Part No: IST1086SIssued year: 2006File size: 0.03mbFile type: pdf
The following method describes the extraction and separation of non-conjugated parent, glucuronide conjugates and sulfate conjugates of a proprietary pharmaceutical from urine and bile using non-polar and anion exchange mechanisms.
Part No: IST1072SIssued year: 2006File size: 0.03mbFile type: pdf
This method describes the extraction of quaternary amines, strongly basic amines and amines that are unstable at high pH levels, from biological fluids. The mechanism is mixedmode
hydrophobic and weak cation exchange, allowing acidic elution conditions.
Part No: AN-IST1004SIssued year: 2008File size: 0.04mbFile type: pdf
This method describes a procedure for the determination of Total Oil and Grease using IR as the technique for final analysis. This represents recommendations for SPE method development. The proposed steps are based on experience with similar analytes and matrices, but have not been verified in Biotage laboratories. Please refer to section below for the analyte and matrix considerations that were made in developing this method. As for all method development, this procedure should first be developed using pure solvent spiked with analyte. Only after the chemistry is established should spiked matrix samples be tested.
Part No: AN-IST1009SIssued year: 2008File size: 0.04mbFile type: pdf
This method describes the use of a strong cation exchange SPE column for the extraction of pyridoxine, riboflavin and thiamine from biological fluid samples. This represents recommendations for SPE method development. The proposed steps are based on experience with similar analytes and matrices, but have not been verified in Biotage laboratories. Please refer to section below for the analyte and matrix considerations that were made in developing this method. As for all method development, this procedure should first be developed using pure solvent spiked with analyte. Only after the chemistry is established should spiked matrix samples be tested.
Part No: PPS347Issued year: 2014File size: 0.49mbFile type: pdf
Trends on chemical synthesis have changed over recent years, with a more targeted approach to molecular design becoming more prevalent. As a result, the speed with which a new compound can be synthesized is key to an efficient laboratory.
Part No: TN522Issued year: 2004File size: 0.03mbFile type: pdf
Microwave assisted organic synthesis has become an important tool to medicinal chemists for rapid organic synthesis. Thousands of research papers have appeared over the last decades on the application of microwave technology in organic synthesis.1 Some of the major advantages include a spectacular decrease in reaction time, improved conversions, clean product formation and wide scope for the development of new reaction conditions.
Part No: Issued year: 2002File size: 0.36mbFile type: pdf
The first decision that needs to be made is what the final analysis will be for the analyte. This will have an impact on the sample and cartridge size, as well as the final elution solvent. Gas chromatography offers higher sensitivity than HPLC, while HPLC is better suited for ionisable species and very high molecular weights. If LC-MS is available, minimal sample clean-up may be required.
Part No: P021Issued year: 2008File size: 1.87mbFile type: pdf
It is well known that traditional liquid-liquid extraction (LLE) provides very clean extracts prior to LC/MS analysis. Supported liquid extraction is analogous to traditional LLE, however, analyte partitioning takes place using an inert support material, rather than two immiscible liquids. This provides excellent extraction efficiencies while alleviating
many of the tedious liquid handling issues associated with LLE.
1) Remember to add stir bar for efficient mixing. Catalysts, salts, or visible precipitate should be washed clear of head space and into solution. Particles adhering to glass head space could cause excessive heating increasing possibility of failure of vial. Stay within specified vial volume range (see diagram for proper filling).
Part No: P080Issued year: 2014File size: 0.88mbFile type: pdf
This poster describes the benefits of supported liquid extraction and highlights its use in removal of endogenous matrix components that cause ion suppression/enhancement (matrix effects) in LC-MS/MS analyses.
Part No: P118Issued year: 2015File size: 0.48mbFile type: pdf
This poster examines the use of ISOLUTE SLE+ columns as an alternative to SPE for the extraction and clean up of hair samples containing drugs of abuse. SLE was found to be a simple, faster alternative to SPE for this type of analysis.
Part No: P089Issued year: 2014File size: 0.79mbFile type: pdf
This poster presents a novel method for the simultaneous extraction, derivatization and subsequent detection of both the traditional 25-hydroxy and the biologically active 1α,25-dihydroxy vitamin D metabolites in serum.