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HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY METHOD FOR DETERMINATION OF LIPOIC ACID IN THE FORM OF 2-S-PYRIDINIUM DERIVATIVE
Chwatko G. (1), Krawczyk M. J. (1), Iciek M. (2), Bilska-Wilkosz A. (2), Marcykiewicz B. (3), Glowacki R. (1)

* The method can be used for routine clinical monitoring of LA in human plasma and urine.
* The method was validated for urine and plasma samples.
* The imprecision, expressed as relative standard deviation value, were within range 0.8-7.7% and 0.9-6.2% for plasma and urine samples, respectively.
* The analytical recovery were from 97.3 to 117.0% for plasma and from 96.5% to 111.5% for urine samples.

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MS Data Processing With Full Flexibility Of Universal Processing Software
Frans Schoutsen, Barbara van Cann, Vincent Jespers, Michal Godula

Liquid Chromatography (LC) in combination with triple quadrupole Mass Spectrometry (MS) is more and more a common analysis technique in routine laboratories. Especially when using MS/MS selected reaction monitoring (SRM) for a large number of components data handling can be a bottle neck. This poster will show MS data processing of pesticides in water samples using an already established chromatography data system which is now also capable of processing large quantities of MS data.

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Analysis of Dithiocarbamate Pesticides by GC-MS
Soma Dasgupta1,2, Sumaiyya Mujawar1, Kaushik Banerjee1, Hans-Joachim Huebschmann3, Paul Silcock4

Analysis of dithiocarbamate pesticides (DTCs) using an optimized GC-MS method is described. DTCs are not stable and cannot be extracted or analyzed directly. The purpose of this work was develop a reliable method for identification and quantification of residues.

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Analysis of Multiresidue Pesticides Present in Ayurvedic Churna by GC-MS/MS
Manoj Surwade, Sunil T Kumar, Aarti Karkhanis, Manish Kumar, Soma Dasgupta, Hans-Joachim Huebschmann, Paul Silcock, Thermo Fisher Scientific

Analysis of Herbal powders or ‘churnas’ using an optimized GC-MS/MS method is described. As they have high amount of matrix co-extractives, they pose critical analytical problems. The purpose of this work was overcome the effect of the matrix and develop a reliable method.

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Automated Solid-Phase Extraction of Oraganochlorine Pesticides from Drinking Water
Frans Schoustsen and Pranathi R Perati

A new method was developed to automate the capture and elution of Organochlorine pesticides from drinking water. The concentrated analytes were then analyzed by GC with Electron Capture Detection (ECD).

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GC-MS/MS Analysis of Pesticide Residue in Green Tea Extracted by QuEChERS with Acetonitrile as Final Solvent
Cojocariu C., Morgan P., Silcock P., Godula M

QuEChERS involves an initial step when a few grams of the sample are extracted with acetonitrile followed by a clean-up step (with dispersive-SPE) used to remove, to a certain extent, unwanted matrix compound (such as pigments, sugars, organic acids). With QuEChERS, the final extract ends up with the pesticides in acetonitrile, which, being polar solvent, can be
problematic in GC-MS.

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Increasing Extraction Efficiency of Pesticides and Dioxins from Wet Samples Using a Novel Polymer During Accelerated Solvent Extraction
Katerina Bousova, Pranathi Perati, Rahmat Ullah, Kannan Srinivasan

Thermo Scientific™ Dionex™ ASE™ Prep MAP is a proprietary polymer designed to remove moisture and increase extraction efficiencies from wet samples including soils, tissues and food products. This unique formulation allows moisture removal under a variety of ionic strength conditions and accelerated solvent extraction conditions.

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Utilization of Hydrogen Carrier Gas on a High Resolution GC-TOFMS System: An Application Compendium
Joe Binkley, David Alonso

GC-HRT methods utilizing hydrogen carrier gas were developed for analysis of representative specialty chemical, forensic, and metabolomic markets.

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Integrated platform including automated bligh and dyer extraction and dual-column
Emmanuel Varesio, Guenter Boehm, Sandra Jahn, Renzo Picenoni, Gérard Hopfgartner

• Automated Bligh and Dyer extraction for metabolomic studies.
• Dual-column UHPLC setup for the analysis of the polar and lipidic fractions.
• Alternating acidic and basic mobile phase for the separation of the polar fraction.
• Identification of unknown compounds by SWATH HR MS2 spectra acquisition.

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Showing Results 31 - 40 of 89
Scientific News
The Perfect Partnership: Research & Industry; Software & Instrumentation. It really starts to come together at ASMS 2015
Collaboration and knowledge-sharing were evident everywhere: on the bus, in the hallways and in the bars. This article aims to capture this theme and share with you some of the fruits of this coming together of science and industry.
Researchers Use Nanotubes to Better Understand Diseases
Researchers in UC’s Department of Cancer Biology are collaborating with material scientists from the University of Houston to create and use nanotubes to capture and understand the regulation of proteins involved in a variety of diseases.
3D for Top-Down Proteomics: Extra Dimension for More Proteins
Researchers from the University of Wisconsin- Madison have tested the possible applications of adding a "third dimension" to chromatography.
Scientists Come Up with New Technique to Detect Alien Life on Mars
Researchers have provided evidence that combining chromatography/mass spectroscopy with Raman spectroscopy could improve astrobiological studies.
Why Do Sewers Smell? Chromatography Takes on a Dirty Job
Researchers in Australia have developed a methodology for uncovering exactly what makes sewage stink.
LECO Announces Special Events at ASMS
Company to host a series of events during the conference held at the America’s Center, Saint Louis, MO on May 31-June 4.
Metabolic Link Discovered Between Colon Cancer and Bacterial Biofilms
A research team writes in Cell Metabolism that they have uncovered a clue to how bacteria may promote some colon cancers.
Shale Drilling Chemicals Discovered in Tap Water
Chemicals commonly used for shale drilling were discovered in the tap water of three Pennsylvania homes, according to a new analysis.
Urine Profiles Provide Clues To How Obesity Causes Disease
Scientists have identified chemical markers in urine associated with body mass, providing insights into how obesity causes disease.
Superior Ability To Rapidly Detect Volatile Organic Compounds
Researchers develop a credit-card-sized gas chromatography platform that can analyze volatile compounds within seconds.
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