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Thursday, July 31, 2014
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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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Characterization of Antibody-Drug Conjugates by SEC with Combined Light Scattering
Chris C. Broomell

Drug Antibody Ratio (DAR) is a critical factor to the effective design of antibody-drug conjugates (ADC). This poster presents a method for DAR determination based on SEC-MALS in conjunction with UV absorption and differential refractive index detection.

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GC-MS Comparison of Lavindin Grosso Oil Obtained by Steam Distillation and SFE
Claudia Worley, Lisa Zona, Susan Sonchik Marine

Oil was extracted from Lavindin Grosso using steam distillation and using supercritical fluid extraction (SFE). Multiple analyses of the same extract demonstrated repeatability of the analytical method. The variability between batches of distillate bracketed the composition obtained by SFE. The differences among the oils could be attributed more to where the lavender was grown than to the extraction method.

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Trace Level Analysis of Perchlorate and Bromate in Various Water Matrices using Suppressed Ion Chromatography
Dr. Jay Gandhi, DR. Stuart Procter

Bromate and Perchlorate are ubiquitous analytes in various water matrices and analysis in trace level is a challenge

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Showing Results 1 - 10 of 46
Scientific News
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.
Reimagining UHPLC
To learn more about the new Vanquish UHPLC system from Thermo Fisher Scientific we spoke to Wulff Niedner, Director of HPLC Product Marketing.
UHPLC: The Greening Face of Liquid Chromatography
Greening pathways for liquid chromatography is especially significant for drug analysis in the pharmaceutical matrix.
Evaluating Acute Hydrogen Sulfide Poisoning in Rats through Serum Metabolomics
Through the use of GC/MS-based metabolomics, researchers have evaluated the effect of acute hydrogen sulfide poisoning on the metabolic profiles of rats.
Separation of mAbs Molecular Variants by Analytical HIC-HPLC
HIC-HPLC is a less widely used analytical technique compared with standard methods for separating variants based on size, charge or electrophoretic mobility.
Simultaneous Determination of Free Urinary Steroids
Researchers have described an LC–MS/MS method that accurate, precise and is in accordance with FDA guidelines.
Moment Analysis of Chromatographic Behavior of Separation Media for Fast HPLC
Chromatographic behavior in RPLC using the C18-silica monolith and C18-core-shell particles was analyzed by the two equations from the kinetic points of view.
Human Proteome Project Uncovers 193 Proteins Not Known to Exist
The team of international researchers reports the identification of 193 novel proteins that came from regions of the genome not predicted to code for proteins.
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