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Matrix enhancement effect: A blessing or curse for gas chromatography?
Jae-Han Shim, Md. Musfiqur Rahman, A. M. Abd El-Aty

A sharp, narrow, and sensitive peak is a pre-condition for a sensitive GC analysis. Therefore, a protectant is needed to protect the analyte from any type of distortion for integration and to prevent overestimation. Existing solutions do not overcome these problems completely due to limitations. As the matrix enhancement problem originated from matrix components, its solution should come from similar components.

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CAPILLARY ELECTROPHORESIS OF APIGENIN
Paulina Furmaniak, Pawel Kubalczyk, Rafal Glowacki

* Application of an appropriate mode of extraction allowed to use on-line stacking method for the determination of apigenin in plant extracts,
* The low limit of detection was 5 nmol in 1 mL of plant extract,
* Presented procedure allows approximately 20-fold increase of sensitivity,
* Elaborated assay can be useful for the determination of apigenin in biological samples.

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INTERACTION BETWEEN WHEY PROTEIN NANOPARTICLES AND FATTY ACIDS
Hassan, Z.M.R*, Awad R. A.*, El-Sayed, M. M. **, Mevat I. Foda**, Otzen, D.*** and Heba H. Salama**

Nanocomplexes can be formed from WPI with good cytotoxic effect to tumer cells using cis-vaccenic and linolenic fatty acids comparable to oleic acid. It was a new interesting observation being that the nanocomplexes formed of WPI with fatty acids has a comparable cytotoxcisty to that of a-LA and ß-lg and can be used in tumor therapy.

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Examination of Pesticide Residues in Wine, Beer and Their Constituent Products Using High-Throughput Techniques to Maximize Extraction & Efficiency
Patricia Atkins, Matt Snyder

In this study, commercial red wine and beer samples were examined for their pesticide concentrations.

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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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Showing Results 31 - 40 of 129
Scientific News
Protein The Clue To Solving A Darwinian Mystery
Scientists at the University of York provided the key to solving the evolutionary puzzle surrounding that Charles Darwin called the ‘strangest animals ever discovered’.
High-End Imaging Techniques Blended
Vanderbilt University researchers have achieved the first “image fusion” of mass spectrometry and microscopy — a technical tour de force that could, among other things, dramatically improve the diagnosis and treatment of cancer.
DNA Safeguard May Be Key In Cancer Treatment
Cornell researchers have developed a new technique to understand the actions of key proteins required for cancer cells to proliferate.
Boy or Girl? Lemur Scents Have the Answer
A new study finds that a pregnant lemur’s signature scent depends in part on whether she’s carrying a girl or a boy.
Identification of Fumonisins in Corn
In this study, fumonisin A1, A2, and a3 are identified and quantified by high-resolution liquid chromatography-orbitrap mass spectrometry.
Ground-Breaking Lung Cancer Breath Test In Clinical Trial
University of Leicester and Leicester’s Hospitals to evaluate revolutionary device which detects lung cancer in early stages.
Pittcon Announces Wide Variety of Short Courses
Courses range from beginner and intermediate to advanced levels.
Saliva Test to Diagnose Autism
A spit test may one day be able to diagnose autism according to researchers at Clarkson University and the State University of New York at Plattsburgh.
Improved Accuracy of Pesticide Detection in Food
European Reference Laboratory improves accuracy of pesticide detection in food with AB SCIEX mass spectrometry instrumentation.
A Better Understanding of Earth’s Geological Evolution
New instruments to more precisely measure a uranium element carbon dating ratio of 238U/235U.
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