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Rapid Detection of Chemicals Emitted From Museum Display Cases
C. Widdowson, D. Barden, and W. Horn, Markes International
A collaboration between Markes and the German Federal Institute for Materials Research and Testing (BAM) has resulted in a new test scheme, featuring TD–GC–MS sampling and analytical instrumentation, for assessing emissions of artefact-damaging chemicals from the materials used in museum display cases. Read More |
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Saccharide Tracers in Aerosols
Dr. Markus Läubli, Metrohm AG
As a result of the private burning of wood, concentrations of levoglucosan, mannosan, and galactosan in the air are usually increased. An optimum separation and sensitivity of the saccharide markers that accumulate on air filters is achieved on our carbohydrate columns with pulsed amperometric detection. Sample preparation merely requires a simple water extraction. Read More |
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SEC-MALS of Transient Proteins
M. Burman and O. Schon, Wyatt Technology Corporation
While AUC may be the gold standard for the determination of self-association in solution, scientists are looking for alternatives due to AUC’s high costs, low through-put and expertise requirements. Here, SEC-MALS has shown excellent agreement with AUC results and can be used as a cheaper, easier, and quicker alternative. Read More |
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Characterization of Protein-Protein Interactions by Size Exclusion Chromatography
Bertrand Raynal, Patrick England, Nadia Benaroudj, and Alex Chenal, Institut Pasteur, Paris, France
In this application note, triple detection size exclusion chromatography (SEC-TD) is used to understand the ability of proteins to form ordered, structured complexes. The controlling mechanism behind these protein complexes is fundamental to our knowledge of protein signaling pathways and the physiological responses they control. Read More |
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Automated SPE and Cleanup for PCBs in Human Serum
Philip Bassignani, FMS,Inc.
The extraction of PCBs from human serum using solid-phase extraction (SPE) coupled with multi-column silica gel clean-up procedures is a well documented procedure. It offers a rapid sample prep protocol, while utilizing minimal organic solvent. Using this template, a rapid screening method has been established for 40 PCBs and their labeled analogs using FMS automated solid-phase extraction and clean-up systems. Read More |
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Extraction of Multiple Mycotoxins From Cereal Based Infant Food Using ISOLUTE® Myco
Adam Senior, Biotage AB, Sweden
This application note describes a solid phase extraction (SPE) protocol appropriate for LC–MS–MS analysis of a range of mycotoxins found in cereal based infant food. The method described in this application note achieves high recoveries of relevant mycotoxins from a cereal based infant food with low %RSDs and LOQs. Read More |
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Multiresidue Analysis of Pesticides in Olive Samples Using GC–MS–MS
A. Moreno López, L. Moreno López, J.L. Pineda Lucas, and J. Stevens, Agilent Technologies
This application note describes a modified QuEChERS technique for the extraction and analysis of 27 pesticide residues in olives by GC–MS–MS multiple reaction monitoring method. Read More |
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Free Opiates and Glucuronides in Urine Extracted by Clean Screen® DAU and Analyzed by LC–MS–MS
Jody Searfoss, UCT, Inc.
Opiates act as narcotic analgesics that depress the central nervous system. Positively- screened specimens usually contain opiate glucuronide conjugates in addition to free opiates. Typical confirmation includes direct opiate analysis without a hydrolysis protocol being conducted. This allows for the determination of parent opiates, metabolites, and glucuronide metabolites. This method uses mixed-mode solid-phase extraction and LC–MS–MS for the extraction of both free opiates and glucuronides in urine. Read More |
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