Environmental methods for water analysis often specify sampling 1 L of water to provide the sensitivity needed for determination of contaminants at low concentrations for health monitoring. In the past decade sensitivity of the analytical technique (GC/MS) has improved and with split/splitless introduction and large volume injection options a wide range of concentrations can be effectively measured.
Tags: 4790, Application Notes, Disk, English, Environmental, GC-MS, Waste water

The US EPA monitors a variety of chemicals in water that may cause harm to humans or wildlife to minimize exposure. Method 625 was developed by the Office of Science and Technology in the Clean Water program to monitor a large suite of semivolatile chemicals in wastewater for compliance with the National Pollution Discharge Elimination System (NPDES).
Tags: 4790, Application Notes, English, Environmental, GC-MS, US EPA Method 625, Waste water

Dioxins are of great environmental concern due to their teratogenic, mutagenic, and carcinogenic impact. These lipophilic compounds bioaccumulate in humans and wildlife and can have half lives of up to 132 years, making them persistent organic pollutants (POPs). Traditional SPE requires a filtration step to remove particulates when using SPE cartridges, because of clogging issues.
Tags: 4790, Application Notes, English, Environmental, River Water, Water

This work demonstrates the performance of automated solid phase extraction (SPE) for the extraction of PAHs from surface water sampled from a nearby pond containing some particulate. An automated system (Biotage® Horizon 4790) with Atlantic® DVB disks, following the requirements of method EN 16691, was used.
Tags: 4790, Anthracene, Application Notes, Benzo (b) fluoranthene, Benzo (g,h,i) perylene, Benzo (k) Fluoranthene, Benzo(a)pyrene, Disk, EN16691 Analytes, EN16691 Water Quality, English, Environmental, Fluoranthene, GC-MS, Indeno (1,2,3-cd) Pyrene, PAHs, Polyaromatic Hydrocarbons (PAH), Surface water

This application note describes the automated solid phase extraction (SPE) and GC/MS analysis of whole water samples according to EN16691 for PAHs. Method EN 16691 is a recently developed method that uses solid phase extraction to isolate organic compounds from 1 L of water using a divinylbenzene (DVB) solid phase extraction disk.
Tags: 4790, Anthracene, Application Notes, Benzo (a) Pyrene, Benzo (g,h,i) perylene, Benzo(b)fluoranthene, Benzo(k)Fluoranthene, Disk, EN16691 Water Quality, English, Environmental, Fluoranthene, GC-MS, Indeno (1,2,3-cd) Pyrene, PAHs, Polyaromatic Hydrocarbons (PAH), Water

Drinking water is a critical resource important for human health. As water becomes more scarce, quality will become increasingly important and monitoring will be required more frequently and at lower concentration levels. The number of compounds and lower concentrations for monitoring will make extraction and analysis even more challenging.
Tags: Application Notes, Chinese Method SL-392-2007, Disk, Drinking water, English, Environmental, GC-MS

Drinking water is an important resource that can provide significant exposure to humans if it is polluted. Analysis of source water, which may come from surface water, groundwater or treated water must be evaluated for possible contaminants to ensure regulatory compliance.1 Drinking water at the tap is often evaluated for contaminants that may be introduced through leaks in the pipes or pipe materials.
Tags: Application Notes, Disk, Drinking water, English, Environmental, GC-MS

Pesticides, including insecticides, herbicides and fungicides are used extensively to increase agricultural yields. The total world usage of pesticides in 2007 was approximately 5.2 billion pounds with the US consuming approximately 22% of the total.1 The wide use of pesticides yields concern that drinking water sources will become contaminated, exposing the population to hazardous substances that may cause cancer.
Tags: Application Notes, Disk, Drinking water, English, Environmental, GC-MS

This application note highlights a SPE disk which was specifically designed to increase the recoveries of traditionally difficult polar compounds as well as help to increase the diversity of the traditional 525.2 list to include those compounds which are of concern in today’s society.
Tags: 4790, Application Notes, Disk, Drinking water, EPA 525.2 Analytes, English, Environmental, GC-MS, Organic Compounds

This application note describes the use of the Biotage® Horizon 4790 automated extractor system, and the Atlantic® DVB SPE disk for the extraction of water samples, as specified in EPA method 525.3.
Tags: 4790, Application Notes, Disk, Drinking water, EPA 525.3 Analytes, English, Environmental, GC-MS, US EPA Method 525.3

This application note demonstrates the use of automated solid phase extraction for a variety of pharmaceutical compounds in drinking water, wastewater and surface water. The criteria specified in US EPA Method 1694 was met, even at very low concentrations. For lower concentrations a larger sample of water may be processed.
Tags: 4790, Acetaminophen, Albuterol, Albuterol, Application Notes, Atenolol, Caffeine, Carbamazepine, Cotinine, DEET, Dehydronifedipine, Diclofenac, Diltiazem, Diphenhydramine hydrochloride, Disk, Drinking water, English, Environmental, Gemfibrozil, Ground water, Ibuprofen, LC-MS TOF, Lamotrigine, Metoprolol, Naproxen, Pharmaceuticals, Sulfadimethoxine, Sulfamethoxazole, Triclocarban, Trimethoprim, Waste water

This application note was developed to demonstrate the extraction of five organophosphate compounds Monocrotophos, Diazinon, Malathion, EPN, and Methamidophos using one solid phase extraction method with one pre-treatment step of sodium chloride (NaCl). The method uses the Biotage® Horizon 4790 automated SPE extraction system. It will show the efficiency of the extraction while demonstrating excellent recoveries of OPP compounds using methylene chloride and minimal amounts of acetone after sample pre-treatment with sodium chloride. Methods were developed and results are shown using 47 mm Atlantic® HLB-H disks and carbon cartridges.
Tags: 4790, Application Notes, Diazinon, Disk, EPN, English, Environmental, GC-MS, Malathion, Methamidophos, Monocrotophos, Organophosphate Pesticide, US EPA Method 608.3, Water

Although not frequently a problem, recent incidents at sea have led to large amounts of crude oil being released and dispersed throughout the Gulf of Mexico, such as in the Deepwater Horizon Gulf oil spill of 2010. Originally presumed to be Louisiana Sweet Crude, sample testing later revealed a harsher form of crude containing a high amount of asphaltenes was actually being released.
Tags: 4790, Application Notes, Disk, English

One of the most frequently desired quantities in environmental chemistry is the amount of diesel range organics (DROs) contained within a sample. The analysis of DROs is performed in almost every major environmental laboratory under the US EPA Method 80151 or by using the similar ISO 9377-22. This method is commonly used to determine the contamination of alkanes from C10 to C28 caused by leaking underground storage containers.
Tags: 4790, Application Notes, Disk, English, Environmental, Sea Water, US EPA Method 8015

Polybrominated diphenyl ethers (PBDEs) are a worldwide contamination problem. Structurally similar to PCBs, these compounds are long-lived in the environment and can bio-accumulate throughout the food chain. The health hazards of these chemicals have attracted increasing scrutiny and, as such, a great deal of research and regulations have been implemented to manage and control them.
Tags: 4790, 5000, Application Notes, Disk, English, Environmental, River Water

Carbaryl, a commonly used insecticide for the past 20 years, has become a significant environmental concern throughout the world. Also known through its trademarked name Sevin, it is a cholinesterase inhibitor and can be toxic to humans, causing problems in the blood, nervous, and reproductive systems.
Tags: 4790, Application Notes, Disk, Drinking water, English, Environmental

This study shows that the Biotage® 4790 Automated Extractor system, along with the Atlantic™ DVB disk, the DryDisk® separation membrane, and the DryVap® Concentrator System can be successfully used to analyze for Nonyl Phenol and Bisphenyl A in water samples. This sample preparation process is fully automated, requiring minimal human intervention, and allowing for reductions in sample processing costs.
Tags: 5000, Application Notes, Bisphenol A, Disk, Drinking water, Endocrine disrupter, English, Environmental, Environmental contaminants, GC-MS, Nonyl phenol, Water

This application note demonstrates that the Biotage(R) Horizon 4790 using Atlantic C18 disks can effectively extract hormone compounds from 1-L water samples in approx 40 mins.
Tags: 11-ketotestosterone, 17-alpha-estradiol, 17-alpha-ethynylestradiol, 17-beta-estradiol, 4790, Androgens, Androsterone, Application Notes, Diethylstilbestrol, Dihydrotestosterone (DHT), Disk, Endocrine disrupter, English, Environmental, Epitestosterone, Estradiol, Estriol, Estrogens, Estrone, GC-MS, Hormones, Mestranol, Norethindrone, Progesterone, Steroid Hormones, Steroid metabolite, Surface water, Testosterone, Water

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants, naturally occurring in coal, crude oil, gasoline, and their byproducts (e.g. coal tar or creosote). In addition, PAHs are formed in the incomplete combustion processes of all organic materials, such as wood or fossil fuels. Consequently, the EU water framework directive (WFD) lists in its annex X the whole group of PAHs as priority hazardous substances.
Tags: 4790, Application Notes, Aqueous, Disk, English, Environmental

Laboratories which take in a high volume of aqueous samples will know that every sample is different. Samples can contain varying amounts of suspended particulates and/or sediment due to either the source of the water, or the collection technique. Still other samples may form precipitates under elevated pH conditions resulting in emulsions. These types of samples have historically proven very challenging when using solid phase extraction (SPE).
Tags: 4790, Application Notes, Disk, English, Environmental, GC-MS, Semi-Volatile Organics, US EPA Method 3535A, Water

Oftentimes, aqueous samples collected contain varying amounts of suspended solids or sediment strictly due to either the source of the water being sampled or improper sampling techniques. In any circumstance, samples with high amounts of particulates or sediment have proven challenging to extract using EPA Method 3535 Solid Phase Extraction (SPE).
Tags: 4790, Application Notes, Aqueous, Disk, English, Environmental, GC-MS, US EPA Method 3535A

The purpose of this application note is to establish a solid phase extraction (SPE) procedure to streamline the sample preparation process for determining organochlorine pesticides from water.
Tags: 4790, Application Notes, Disk, English, Environmental, GC-MS, Organochlorine pesticides (OCP), US EPA Method 8081, Water

Although not frequently a problem, recent incidents at sea have led to large amounts of crude oil being released and dispersed throughout the Gulf of Mexico. Originally presumed to be Louisiana Sweet Crude, sample testing later revealed a harsher form of crude containing a high amount of asphaltenes was actually being released. The differences are substantial, as Louisiana Sweet degrades more readily in nature than crude oil containing asphaltenes.
Tags: 4790, Application Notes, Disk, English, Environmental, GC-MS, Polyaromatic Hydrocarbons (PAH), Sea Water

Throughout the world, a lack of regulation has been blamed for the detection of pharmaceuticals and personal care products (PPCP) in some bodies of water. While the detected amounts are usually relatively small, the persistence of these compounds means that they can cause untold damage to the ecosystem for years to come.
Tags: Application Notes, Disk, English, Environmental, Pharmaceuticals, UPLC-MS/MS, Water

The purpose of this application note is to demonstrate the capabilities of the automated Horizon Technology solution when used for the analysis of EPA method 8061A phthalate ester compounds in surface and ground water. Method 8061A states gas chromatography/mass spectrometry (GC/MS) can be used as an alternative for compound confirmation for phthalate esters.
Tags: 4790, Application Notes, Disk, English, Environmental, GC-MS, Ground water, Phthalic acid esters, Surface water

At present, pollution of freshwater algae has become aglobal environmental problem. Of all the different pollution types, microcystinLR is the most toxic and the most acute hazard as far as is known presently
Tags: 4790, Application Notes, English, Environmental, HPLC, Mycotoxin, Water

This application note investigates the applicability of automated solid phase extraction using the Biotage(r) Horizon 4790 extractor and DryDisk solvent drying system to extraction of a wide range of different compounds from phenols, to triazines, to organochlorine and organophosphorous pesticides spiked into tap water at a concentration of 1 ug/L.
Tags: 4790, Application Notes, Disk, English, Environmental, GC-MS, Organochlorine pesticides (OCP), Organophosphate Pesticide, Phenols, Triazine Herbicides, Water

EPA Method 8141B describes the performance based procedure to determine low ppb levels of organophosphorous pesticides in ground water. The OP pesticides are extracted using solid phase extraction (SPE) based on the procedure outlined in Method 3535A for OP pesticides by Method 8141. The analysis is performed with capillary GC using a FPD (flame photometric detector). This initial demonstration of capability was conducted using the Biotage® Horizon 4790 Automated Extractor System.
Tags: 4790, Application Notes, Azinphos methyl, Chlorpyrifos, Demeton (O&S), Diazinon, Disk, Disulfoton, EPN, English, Environmental, Ethion, Ethyl parathion, GC-FPD, Ground water, Malathion, Methyl parathion, Organophosphate Pesticide, Organophosphates, US EPA Method 8141

Method 1668A is used for determining the level of chlorinated biphenyl congeners by high resolution gas chromatography with high resolution mass spectrometry (HRGC/HRMS). For aqueous samples (samples containing less than 1% solids) – Stable isotopically labelled analogs of the toxic PCB’s are spiked into a 1L sample, and the sample is extracted using the Biotage® Horizon 4790 Automated Extraction System along with the Atlantic™ C18 solid phase extraction (SPE) disk. Samples are then dried and concentrated using the DryVap® Automated Drying and Concentrating System with DryDisk® technology.
Tags: 4790, Application Notes, EPA 1668A analytes, English, Environmental, GC-MS, PCBs, Water

The City of Fort Worth, Water Department conducted an evaluation of the Atlantic™ solid phase extraction (SPE) C18 disks using EPA Method 608. This application note describes the procedure to determine low ppb levels of organochlorine pesticides and PCBs in wastewater. This procedure used methylene chloride as the primary extraction solvent, followed by a hexane solvent exchange. Extracts were then analyzed by GC/ECD using a pressure pulse injection technique.
Tags: 4,4,DDD, 4790, Aldrin, Application Notes, DDE, Disk, EPA 608 analytes, Endosulfan, Endosulfan sulfate, Endrin, Endrin Aldehyde, Endrin Ketone, English, Environmental, GC/ECD, Heptachlor, Heptachlor epoxide, Methoxychlor, Organochlorine pesticides (OCP), Organochlorines, PCB, PCB1016, PCB1260, PCBs, TCMX, US EPA Method 608.3, Waste water, α-BHC, β-BHC, γ-BHC, δ-BHC

EPA Method 608 describes the procedure to determine low parts per billion levels of organochlorine pesticides, polychlorinated biphenyls, toxaphene and chlordane in wastewater. The laboratory that collected the data presented in this application note uses EPA method 608 ATP3M0222 as the approved SPE technique for waste water extraction. The disks compared in this study are : “Certified for Automation” Atlantic™ C18 (47 mm) and 3M Empore™ High Performance Extraction Disk C18 (47 mm). Comparisons were made using side-by-side extraction and identical calibration parameters.
Tags: 4,4,DDD, 4790, Aldrin, Application Notes, DDE, Dieldrin, EPA 608 analytes, Endosulfan, Endosulfan sulfate, Endrin, Endrin Aldehyde, Endrin Ketone, English, Environmental, GC/ECD, Heptachlor, Heptachlor epoxide, Methoxychlor, Organochlorine pesticides (OCP), PCB, PCB1016, PCB1260, PCBs, TCMX, Waste water, α-BHC, β-BHC, γ-BHC, δ-BHC

Polychlorinated Biphenyls (PCB) are a worldwide contamination problem. They are extremely stable and as such, very long lived in the environment. The end result is that PCBs tend to bioaccumulate throughout the food chain and a great deal of research and regulations have been dedicated to their study.
Tags: 4790, Application Notes, English, Environmental, GC-MS, PCB, US EPA Method 8082, Water

This application note discusses the preliminary findings and steps taken to develop an SPE method used to detect the lower limit of 50 ng/L of Bentazone in influent river water, using the BiotageHorizon 4790
Tags: 4790, Application Notes, Bentazone, Disk, English, Environmental, HPLC, LC-MS/MS, Pesticides, Water

This application note demontrates that the Biotage® fully automated extraction, drying and concentration systems used with the Atlantic™ HLB disk are capable of extracting PAH compounds from sea water. Typical extraction times using the Biotage® Horizon 4790 range from 20 to 25 minutes while drying and concentration on the DryVap® with the DryDisk® took approximately 35 minutes.
Tags: 4790, Application Notes, Disk, English, Environmental, GC-MS, PAHs, Polyaromatic Hydrocarbons (PAH), Sea Water

This application note describes the automated extraction of dispersed oil in water (OIW) using solid phase extraction (Atlantic® DVB disk and Biotage® Horizon 4790) and analysis by GC-FID.
Tags: Application Notes, Disk, English, Environmental, Environmental contaminants, GC-FID, Oil & Grease, Water

The purpose of this application note is to demonstrate the use of a fully automated solid phase extraction (SPE) and concentration system that provides fast extraction while improving the quality and consistency of results for EPA Method 8270D.
Tags: 4790, Application Notes, Disk, English, Environmental, GC-MS, Semi-Volatile Organics, US EPA Method 3535A, Water

In this study, the effectiveness of the Atlantic™ DVB SPE Disk in extracting organochlorine pesticides from water samples was investigated, and an optimized method of extraction developed.
Tags: 4,4,DDD, Aldrin, Alpha-Chlordane, Application Notes, DDD, DDE, DDT, Dieldrin, Disk, EPA 8081 Analytes, Endosulfan, Endosulfan sulfate, Endrin, Endrin Aldehyde, Endrin Ketone, English, Environmental, Heptachlor, Heptachlor epoxide, Methoxychlor, Organochlorine pesticides (OCP), US EPA Method 8081, Water, α-BHC, β-BHC, γ-BHC, δ-BHC

EPA Method 1657 describes the procedure to determine low ppb levels of organophosphorous pesticides in wastewater. The disks compared in this study are: “Certified for Automation” Atlantic™ C18 (47 mm) and 3M Empore™ High Performance Extraction Disk C18 (47 mm).
Tags: 4790, Application Notes, Azinphos methyl, Chlorpyrifos, Demeton (O&S), Diazinon, Disk, Disulfoton, EPA 1657 analytes, EPN, English, Environmental, Ethion, Ethyl parathion, GC-FPD, Malathion, Methyl parathion, Organophosphate Pesticide, Waste water

Method 1657 describes the procedure to determine low ppb levels of organophosphorus pesticides in municipal and industrial wastewater. The City of Fort Worth Water Department implemented Automated SPE for the analysis of organophosphorous pesticides by EPA Method 1657, using the Atlantic™ C18 solid phase extraction disk. The Biotage® Horizon 4790 Automated Extraction System with Envision® Platform controller, and the DryVap® Automated Drying and Concentration System were used in this application note.
Tags: 4790, Application Notes, Azinphos methyl, Chlorpyrifos, Demeton (O&S), Diazinon, Disk, Disulfoton, EPA 1657 analytes, EPN, English, Environmental, Ethion, Ethyl parathion, GC-FPD, Malathion, Methyl parathion, Organophosphate Pesticide, Waste water

The purpose of this application note is to demonstrate the use of a fully automated solid phase extraction (SPE) and concentration system that provides fast sample preparation while improving the quality and consistency of results for the Total Petroleum Hydrocarbon (TPH) compounds from C10 to C40 as dictated by EPA Method 8015.
Tags: 4790, Application Notes, Disk, EPA 8015 Analytes, EPA 8015 analytes, English, Environmental, GC-FID, Ground water, Hexane Extractable Material, Surface water, Total Petroleum Hydrocarbons (TPH, SGT-HEM), US EPA Method 8015

This application note uses the Biotage® Horizon 4790 automated extraction system with a DVB SPE disk to extract an aqueous sample for PAH compounds analysis. The extract is dried using the Horizon Technology DryDisk®.
Tags: 1-methylnaphthalene, 2-methylnaphthalene, 3-methylcholanthrene, Acenaphthene, Acenaphthylene, Acenapthalene, Anthracene, Application Notes, Benzo (a) Anthracene, Benzo (a) Pyrene, Benzo (b) fluoranthene, Benzo (g,h,i) perylene, Benzo (k) Fluoranthene, Benzo(a)anthracene, Benzo(a)pyrene, Benzo(b)fluoranthene, Benzo(k)Fluoranthene, Chrysene, English, Environmental, Fluoranthene, GC-MS, Napthalene, PAHs, Perylene-d12, Phenanthrene, Polyaromatic Hydrocarbons (PAH), Polyaromatic hydrocarbons, Water

EPA Method 552.1 is an ion exchange procedure used for determining haloacetic acids and dalapon in drinking water and drinking water sources. The purpose of this application note is to present data demonstrating the capability of the Horizon Technology SPE-DEX® 4790 Automated Extraction System to perform the sample extraction required for this method.
Tags: 2-Bromopropionic Acid, Application Notes, Bromochloroacetic Acid, Dalapon, Dichloroactic Acid, Disk, Drinking water, English, Environmental, GC/ECD, Haloacetic Acids, Monobromoacetic Acid, Monochloroacetic Acid, Trichloroacetic Acid

Method 549.2 is used to determine diquat and paraquat in drinking water and drinking water sources. The analytes are extracted from the water using a Biotage® Horizon 4790 and 47mm C8 disk.
Tags: Application Notes, Diquat, Disk, Drinking water, EPA 549.2 Analytes, English, Environmental, Paraquat

EPA Method 548.1 details the procedure for the determination of endothall in drinking water by ionexchange solid phase extraction (SPE), acidic methanol methylation, and gas chromatography / mass spectrometry. This note presents data from the State of Idaho Bureau of Labs for the initial demonstration of capability using the Biotage® Horizon T4790 Automated Extractor System.
Tags: Application Notes, Disk, Drinking water, EPA 548.1 Analytes, Endothall, English, Environmental, GC-MS

EPA Method 525.2 describes the procedure to determine low ppb levels of semi-volatile organic material in drinking water using solid phase extraction (SPE) or liquid-solid extraction (LSE) techniques. The extraction solvents are methylene chloride and ethyl acetate. Extracts are analyzed by GC/MS using a splitless injection technique.
Tags: 2,4-D, 245-T, ACIFLUORFEN, Application Notes, BENTAZON, Bentazone, Chlorinated acids, DCPA, MONO ACID, DCPAA-SS, DINOSEB, Dicamba, Disk, Drinking water, English, Environmental, GC/ECD, PCP, PICLORAM, SILVEX

Method 508.1 is used to determine twenty-nine chlorinated pesticides, three herbicides, and four organohalides in ground water, drinking water, and water in any treatment stage. The analytes are extracted from the water using a 47 mm C18 disk. The disk is extracted on the Horizon Technology SPE-DEX® 4790 Automated Extraction System using Ethyl Acetate and Methylene Chloride (DCM). The extract is then dried and concentrated using the Horizon Technology DryVap® with DryDisk® technology. Final analysis is by GC/ECD.
Tags: Application Notes, Chorinated Pesticides, Drinking water, English, Environmental, GC-MS, Ground water, Herbicides, Organohalides, Pesticides, US EPA Method 508.1, Water

EPA Method 506 is used to determine Phthalate and Adipate Esters in drinking water. The analytes are extracted from water using a Horizon Technology 47 mm Atlantic C18 disk. The disk is extracted with Acetonitrile and Methylene Chloride. The extract is then dried and concentrated to a final volume of 1.0 mL using the Horizon Technology DryVap® with DryDisk® technology. Final analysis is by GC/PID.
Tags: Adipate esters, Application Notes, Disk, EPA 506 Analytes, English, Environmental, Phthalates, Phthalic acid esters

This evaluation study was conducted to determine the feasibility of the Biotage SPE-DEXÒ 4790 Automated Extraction System for the extraction of herbicides and pesticides. The preliminary results demonstrate the capability of this method for the automated SPE extraction of organic compounds.
Tags: Acetochlor, Alachlor, Application Notes, Atrazine, Base-neutral herbicides, Chlorothalonil, Chlorpyrifos, Clomazone, Cyanazine, Deethylatrazine,, Demethanamid, Desethyl atrazine, Desisopropyl atrazine, Diazinon, Dimethoate, Disk, EPTC, English, Environmental, Ethafluralin, Fonofos, GC-MS, Malathion, Metazachlor, Methyl parathion, Metolachlor, Metribuzin, Metribuzin DA, Metribuzin DADK, Metribuzin DK, Pendimethalin, Persistant organic pollutants (POP), Pesticides, Phorate, Prometon, Propachlor, Propazine, Simazine, Terbufos, Triallate, Trifluralin, Water

This study shows that the SPE-DEX® 4790 Automated Extractor system can process water samples containing suspended particulate matter, up to 1000 mg, for the analysis of PAH’s. As PAH’s are found in both the dissolved and particulate phase of the water sample, it is important to be able to handle “whole” water samples such that the particulate matter in the water sample is retained and extracted with the SPE disk. This filtration method ensures that the PAH’s found in the dissolved phase, and those adsorbed onto the particulate matter are properly extracted.
Tags: Acenaphthene, Acenapthalene, Anthracene, Application Notes, Benzo (g,h,i) perylene, Benzo(a)anthracene, Benzo(a)pyrene, Benzo(b)fluoranthene, Benzo(k)Fluoranthene, Chrysene, Dibenzo(ah)anthracene, Disk, English, Environmental, Fluoranthene, Fluorene, GC-MS, Indeno(123-cd)pyrene, PAHs, Persistant organic pollutants (POP), Phenanthrene, Polyaromatic Hydrocarbons (PAH), Pyrene

The Horizon Technology SPE-DEX 4790 Automated Extraction System is a programmable, multipurpose SPE system, capable of processing aqueous samples directly from their original containers.
Tags: Brochures

This Technical Tip describes methods for processing samples that contain a high amount of sediment or suspended solids using the Fast Flow Disk Holder.
Tags: Tech Tips

This month’s topic of discussion will be the operation of the sample collect check valve on the SPE-DEX® 4790 extractor.
Tags: Tech Tips

Are you keeping up with your annual six month Hydrophilic Solution treatments for your SPE-DEX 4790 or 1000/3000 SPE-DEX instruments? 1. The water sample will not flow down into the disk holder. 2. My water inlet valve may not be opening 3. My water inlet valve is opening, but my sample is not dispensing into the disk holder. 4. My entire collection vessel is filled with the water sample.
Tags: Tech Tips

Basically, my problem is this: the instrument seems incapable of eluting the solvent into the collection vial.
Tags: Tech Tips

The focuses of this month’s discussion are the: Luer fitting (02-0592) on the bottom of any 4790 Disk Holder. Cap Adapters (150-0001, 150-0008-01) 40 mL VOA vial adapter (160-0001-02).
Tags: Tech Tips

It’s important to replace these filters to ensure proper operation and protection of the internal solvent delivery valves. This filter not only traps particulates, but also protects the valves as particulates may get trapped within and could lead to improper solvent dispensing even when the extractors are at idle.
Tags: Tech Tips

On the 4790, the thermistors, hereafter referred to as the “sensors”, are used to monitor the presence, or absence of liquid, be it solvents or the water sample.
Tags: Tech Tips

When not in use, the check valve ball can stick, preventing the elution of solvents into the collection vessel. Prior to beginning an extraction, free the Check Valve by using the Check Valve Tool (PN: 02-0725 for the 1000/3000XL Extractors, or PN: 02-0727 for the 4790 Extractors).
Tags: Tech Tips

The Thermistors are liquid sensors that provide signals to the Extractor during several extraction steps.
Tags: Tech Tips

To prevent this, the valve is conditioned with the ST-100 hydrophilic solution. This solution will increase the “wettability” of the surfaces of the valve, thus preventing a Vapor Lock.
Tags: Tech Tips