|Determination of Metabolically Unstable Drugs in Blood by Heat-Stabilized DBS and LC-MS/MS|
Charlotta Göransson; Karl Sköld; David Zeeberg; Gunnar Hägglund; Eskil Hermansson; Peter Abrahamsson and Martin Ahnoff
The aims of this work were to investigate drug stability prior to, during and after blood spot sampling, using procaine, prulofloxacine, esmolol, and acetylsalisylic acid as examples of drug compounds with limited stability and to compare conventional DBS sampling procedure with DBS sampling including heat stabilization.
|LC/MS/MS Quantitation of Eicosapentaenoic Acid in Rat Plasma|
Rachel Sun, Jordan Nally, Tim Shoaf
Eicosapentaenoic acid (EPA) is an omega-3 fatty acid, which has been documented to be important in biochemical and physiological processes including inflammatory response, blood clotting and the immune system. Eicosapentaenoic acid (EPA) appears in different forms in the blood including triglyceride, ethyl ester, or free acid. In this work we presented an LC/MS/MS method to quantitate the total eicosapentaenoic acid in rat plasma with a 96-well plate format.
|Ion Chromatography ICP-Q-MS for the Detection of Arsenic Species in Apple Juice|
Daniel Kutscher, Shona McSheehy-Ducos, Julian Wills and Detlef Jensen
Interest in the determination of Arsenic species in fruit juices has been triggered by recent media reports in the United States claiming that some apple juices may contain high amounts of Arsenic. Inorganic forms of Arsenic (As3+ and As5+) are highly toxic, whereas the organic forms (e.g. arsenobetaine) are not considered toxic. A robust IC-ICP-MS system was developed and shown to be a highly selective and sensitive technique for determination of trace element species.
|Streamlined QbD HPLC Method Development with Automated Data Processing|
Gang Xue1, Jeff Harwood1, Charles Cheng1, David Fortin1, Jian Wang1, George Reid1, Mike McBrien2, and Andrey Vazhentsev2
Quality by Design (QbD) has been widely applied to pharmaceutical manufacturing to enhance process robustness, and improve product quality and manufacturing productivity. Recently, there arose tremendous interests from both the pharmaceutical industry and regulatory agents to expand it to analytical methodology.
|Characterizing Small Molecules in Biological Extracts using IntelliXtract Data Processing on High Resolution Accurate Mass Time-of-Flight Data|
Margaret Antler, Graham A. McGibbon, Vitaly Lashin, Jeffrey S. Patick and Kevin Siek
To detect small molecules in biological extracts, LC/MS performed using high resolution time of flight with accurate mass analysis is a powerful technology. Together with advanced data processing algorithms, accurate mass and relative isotope abundance measurements, molecular formulae can be determined and compounds identified.
Dr Brian Everatt1 C.Chem., FRSC, Simon Tullett2
Lab2Lab is a novel approach to submitting and transporting samples for analysis across an entire site. Sample tubes are registered and methods selected, an ELN reference is assigned and the sample tube is placed into the “Sender”. The system transports the samples using low pressure compressed air and directs them to the most appropriate analytical instrumentation available. The analytical results are then automatically returned to the originators ELN.
|Qualitative Comparison of Wine Process Samples with UHPLC and Ultra-High Resolution TOFMS|
Jeffrey S. Patrick, Joe Binkley, Matthew Giardina and Kevin Siek
The evaluation, identification, and quantitation of flavones, antioxidants and related nutrients, biogenic amines, and potential contaminants in wine and other foodstuffs provides valuable information on their nutritional and health values.
|Analysis of Pesticide Residues in JonaGold Apples Using QuEChERS Approach and Comprehensive Two-Dimensional Gas Chromatography Time-of-Flight Mass Spectrometry (GCxGC-TOFMS)|
Joe Binkley, John R Heim and Doug Staples
Screening and quantitation of pesticide residues in fruits and vegetables is of utmost importance for public health and safety concerns. These commodities can contain hundreds-to-thousands of analytes, making them extremely difficult for the screening and accurate quantitation of pesticide residues.
|Analysis of Fruit Commodities by GC-TOFMS and GCxGC-TOFMS Using QuEChERS Approach|
Doug Staples, Joe Binkley and John Heim
The availability of fruit commodities from a wide variety of sources has increased the need for rapid and accurate screening for pesticides in fruit. Not all fruit commodities are brought to market under the strict guidelines of the United States Department of Agriculture. Determining whether or not the Environmental Protection Agency tolerances for various pesticides have been violated is important in the risk assessment for consumers in the United States.