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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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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.

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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).

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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.

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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.

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Exploring The Benefits Of Automated Unattended Sample Derivatization Prior To Gas Chromatography Analysis
A. Caruso, M. Santoro, P. Magni, S. Pelagatti, R. Facchetti

Purpose: Exploring the possibility to perform the sample preparation steps necessary for the derivatization of analytes in a fully automated and reliable way by means of the same robotic sampler used for sample injection into the gas chromatograph.
Methods: As an example of application we screened dairy products for melamine and its derivates presence via GC-MS/MS.
Results: The outcome are good and precise results that show how it is possible to reliably automate sample preparation opera

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Determination of Veterinary Drug Residues in Milk by GC/MS and GC/ECD
Yu Chongtian, Lv Jianxia

Purpose: Develop a rapid, sensitive method for determining amitraz and its metabolites in milk.
Methods: Samples were hydrolyzed in acidic condition and extracted with hexane. After derivativation, the samples were analyzed by GC-ECD or directly by GC-MS.
Results: The results show that GC-MS determination of amitraz and its metabolites is rapid and sensitive.

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Automated, Rapid And Reliable Determination Of Dissolved Gases In Water By Static Headspace – Gas Chromatography
A. Caruso, M. Santoro, F. Bedini, P. Magni, S. Pelagatti

Purpose: Exploring the possibility to perform a quantitative determination of dissolved gases in water in a reliable and accurate way. Methods: The quantification of dissolved gases is performed by building a calibration curve spiking blank water samples with increasing quantities of saturated water followed by headspace sampling and GC/ FID analysis. Results: The results show good correlation factors and limit of quantification lower than 10ppb for the four gas analyzed.

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Showing Results 11 - 20 of 58
Scientific News
Study Aims to Develop Breath Test for COPD
A new clinical iniative, lead by NYU Langone Medical Center, aims to determine a breath test’s effectiveness to identify volatile organic compounds (VOCs) in human breath that are biomarkers of chronic obstructive pulmonary disease (COPD).
Salamander Skin Peptide Promotes Wound Healing in Mice
New research suggests that the peptide tylotoin exerts the promotion of wound healing with epidermal growth factor in a murine model of a full thickness dermal wound.
Comparison of Caffeinated and Decaffeinated Coffee - Implications for Alzheimer's Disease
Researchers from the National University of Singapore successfully demonstrated the viability of GC-TOF-MS as an analytical platform for metabolomics analysis of coffee samples.
High Capacity Antibody Purification
Researchers from the A*Star Bioprocessing Technology Institute have used magnetic nanoparticles to break the capacity barrier for antibody purification.
Embalming Study ‘Rewrites’ Key Chapter in Egyptian History
New evidence to suggest that the origins of mummification started in ancient Egypt 1,500 years earlier than previously thought.
RP HPLC Retention Behaviours in Carotenoids Analysis
The efficiency of the separation process in reversed-phase HPLC is highly dependent on the binary hydro-organic mobile phase composition and surface properties of the packing material.
Identification of Psoriatic Arthritis Mediators in Synovial Fluid
This study represents the most comprehensive proteomic analysis of psoriatic arthritis synovial fluid, to date.
Simultaneous Determination of Six Flame Retardants in Water
The work aimed to develop an analytical procedure for the extraction and simultaneous determination of selected flame retardants.
Using LC-MS to Analyse Sulfonamides in Food Grade Honey
Sulfonamides are one of a number of groups of chemicals whose presence in honey is limited by international regulations.
Assessing Anticancer Drugs Efficacy by Amino Acid Metabolomics
Researchers aimed to develop a method that determines the therapeutic efficacy of anticancer drugs based on the changes in amino acid metabolism at the cellular level.
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