Part No: P159Issued year: 2017File size: 0.25mbFile type: pdf
When it comes to polar organic compound purification,
many chemists turn to normal-phase flash
chromatography often utilizing dichloromethane and
methanol as the eluting solvents. While this can work, it
often can be challenging to optimize due to methanol’s
high polarity and protic chemistry.
Part No: PPS510Issued year: 2019File size: 1.24mbFile type: pdf
Peptide purification via flash
chromatography has recently been demonstrated as a viable
alternative to the more standard HPLC methods currently
utilized. Flash chromatography offers peptide chemists the
advantage of significantly greater loading capacity reducing the
overall purification time but with a compromise of decreased
peak resolution. Herein we present several strategies that,
when implemented, allow for very high purity peptide samples
purified by flash chromatography.
Part No: MSACL US 2018 Breakfast SeminarIssued year: 2018File size: 3.24mbFile type: pdf
The use of LC/MS analysis in the clinical lab has increased exponentially over the last 10 years. Modern mass spectrometers are extremely sensitive allowing low level detection of many target analytes. However, this sensitivity can come at a price, in that levels of contamination not previously detected with less sensitive instruments can now have larger impact on analysis. The complexity of common matrices such as plasma/serum and urine while presenting different challenges can have a marked influence on method performance.
As a result sample preparation is an extremely important part of the process in order to provide robust methods. This seminar focuses on some of the method development challenges our lab faced when looking at two clinical assays:
Endogenous steroid hormone extraction from serum, and catecholamine extraction from plasma and urine.
Particular emphasis is placed on the various sample preparation options we looked at for the extraction of these analytes. During optimization of the extraction process we investigated analyte recovery, co-extractable matrix components, HPLC column degradation, calibration curve performance and limits of quantitation.
MSACL US 2018 Breakfast Seminar
Part No: TN-0022.0207Issued year: 2007File size: 0.08mbFile type: pdf
ACTU Preparation of PS-HOBt(HL). 2-Chloro-1,1,3,3 tetramethyluronium hexachloroantimonate (ACTU) is a reagent which allows polymer-supported active esters of PS-HOBt(HL) to be prepared in pure DMF. ACTU addresses the problem that many carboxylic acids are not soluble in DCM.
Part No: PPS457Issued year: 2017File size: 0.02mbFile type: xlsx
Use this simple tool to look up possible adducts and fragments which may occur with Isolera™ Dalton or Biotage® Dalton 2000 mass detectors.
Enter the target compound weight and use the mass lookup cell to highlight resulting m/z values.
Part No: Issued year: 2008File size: 0.2mbFile type: pdf
Advancer Kilobatch provides up to 12 hours unattended processing of homogenous reaction mixtures delivering kilogram quantities of your target compound. In addition, the system
will accommodate heterogeneous reactions by processing four sequential cycles (250 mL) to yield a 1 L batch. Through simple solid loading replenishment, kilogram quantities of
complex heterogeneous reactions are easily achieved.