|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.
|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.
|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).
|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.
|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.
|Intact Protein LC-MS: How to Overcome the Challenges?|
Robert van Ling, Evert-Jan Sneekes, Sebastiaan Dolman, Laurent Rieux, Mauro DePra, Christian Ravnsborg, Dafydd Milton, Remco Swart
Purpose: Facilitate intact protein LC-MS without compromising performance.
Methods: Construct prototypes of integrated column and sprayer dedicated for intact protein separations and compare performance.
Results: Three prototypes have been directly compared and all showed good protein separations, each with their unique area of strength.
|Instant Connect Gas Sampling Valve Module Introducing a New Flexibility in Gas Sampling for GC and GCMS|
Stefano Pelagatti, Paolo Magni, Fausto Pigozzo
Purpose: We present a newly developed gas sampling valve module for the Thermo Scientific™ TRACE™ 1300 Series Gas Chromatograph (GC).
|GC-MS/MS ANALYSIS OF BENZODIAZEPINES USING ANALYTE PROTECTANTS|
Jeremy Matthews, Alex Chen, Flavio Bedini
Purpose: Assess the feasibility of using analyte protectants to improve the analysis of benzodiazepines.
|GC-MS/MS Analysis of Pesticide Residues in Green Tea Extracted by QuEChERS with Acetonitrile as Final Solvent|
Cojocariu C., Morgan P., Silcock P., Pelagatti S., Magni P. and Pigozzo F.
This poster describes the analysis of several challenging pesticides from green tea samples using GC-MS/MS and acetonitrile as final extraction solvent. The compounds analysed are representatives of various classes of pesticides, such as carboxamids, OC, OP, pyrethriods, aromatic, phenylamides.