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Wednesday, November 26, 2014
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METHOD DEVELOPMENT FOR THE SIMULTANEOUS DETERMINATION OF METHYLMERCURY AND INORGANIC MERCURY IN SEAFOOD
Sergio Carneado, Ariane V. Zmozinski, Carmen Ibáñez-Palomino, Àngels Sahuquillo, José Fermín López-Sánchez, Márcia M. da Silva

This work reports the method development for the simultaneous determination of methylmercury (MeHg+) and inorganic mercury (iHg) species in seafood. The study focused on the extraction and quantification of MeHg+ by liquid chromatography coupled to on-line UV irradiation and cold vapour atomic fluorescence spectroscopy (LC-UV-HG-AFS), using HCl 4 mol L-1 as extractant agent.

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Microextraction techniques combined with X-ray fluorescence spectrometry for determination of different metal ions in water
Karina Kocot (a), Beata Zawisza (a), Eva Marguí (b), Ignasi Queralt (c), Rafal Sitko (a)

In present work new preconcentration procedures combining microextraction techniques and X-ray fluorescence spectroscopy were developed. Proposed methodologies are promising tools for multielemental analysis enabling detection of natural pollutants in different water samples.

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Application of Central Composite Design (CCD) for the Optimization of Ultrasound-assisted Extraction (UAE) of Phenolics from Corn (Zea mays)
Widiastuti Setyaningsih, 1,2 Erwan Duros, 3 Ceferino Carrera, 4 Miguel Palma, 2 Carmelo G. Barroso 2

A new Ultrasound-assisted Extraction (UAE) of phenolic compounds from corn (Zea mays) has been optimized by means of chemometrics tool. The proposed method was validated and successfully applied to the analysis of phenolics content in several corn cultivars.

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MsCompare: An Untargeted LC & GC/MS Metabolomics Platform for Quality Control, Precise Deconvolution and Data Analysis
Marco Ruijken

A GC/MS or LC/MS workflow for Metabolomics applications includes a number of distinct steps: experimental design, sampling, sample preparation, data acquisition, data processing, deconvolution, identification and data interpretation.

The MsXelerator software includes Quality Control procedures and Analysis of Variance (ANOVA) to properly control each step in this workflow and to obtain reliable results for both quantitation and identification.

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Searching for Urinary Biomarkers of Exposure to Heterocyclic Amines (HCAs)
Rosa Busquets, Henrik L. Frandsen, Kerstin Skog

Heterocyclic amines (HCAs) are foodborne carcinogens present in cooked meat and fish, mainly. Metabolites of HCAs have been determined in urine from volunteers following a controlled meal.

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Mixtures Analysis of Complex Mixtures
Michael Bernstein; Carlos Cobas; Santi Domínguez; Manuel Pérez; Agustín Barba

We describe an NMR method to quantify mixture components in wine, edible oils, etc. The method is fully customizable, and amenable to high throughput operation.

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A Complete Wine Analysis Using Multiplets Detection
Dr Michael Bernstein1; Agustín Barba1; Dr Susanne Klein2; Dr Andrea Dreiseitel2; Daniel Heidger2 and Volker Heidger2

NMR mixtures analysis can be used to determine the concentration of key components in wine. Here we show the analysis using SMA from Mestrelab.

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DPPH scavenging activities of selected flavonoids and their mixtures
Brachos D.(1)

The aim is to identify the ati-oxidant activity of selected flavonoids (quercetin, luteolin and galangin) and their mixtures using DPPH method including their synergistic or antagonistic interactions.

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Correlation between plasma levels of lutein and oxidized low density lipoproteins: a short human intervention study
Tiziana Bacchetti, Gianna Ferretti

The increase of plasma carotenoids, in particular lutein, after dietary treatment for two weeks is associated with a significant protective effect against lipid peroxidation of plasma lipoproteins.

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Analysis of 10 systemic pesticide residues in various baby foods using liquid chromatography-tandem mass spectrometry
Jae-Han Shim, Angel Yang, A. M. Abd El-Aty, Jong-Hyouk Park, Ayman Goudah, Md. Musfiqur Rahman, Jung-Ah Do

The method developed was sensitive and selective, and detected the analytes below the MRL established by the European Commission and the Korea Food and Drug Administration. The combination of QuEChERS sample preparation and LC-MS/MS analysis provided acceptable quantitative and qualitative results in baby food.

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Showing Results 1 - 10 of 47
Scientific News
Electronic ‘Tongue’ to Ensure Food Quality
The device could one day sample food and drinks as a quality check before they hit store shelves.
Altered Milk Protein Can Deliver AIDS Drug to Infants
Binding with an antiretroviral drug promises to greatly improve treatment for infants and young children suffering from HIV/AIDS.
Could Non-gluten Proteins Play a Role in Celiac Disease?
Scientists are reporting in ACS’ Journal of Proteome Research that people with the disease also have reactions to non-gluten wheat proteins.
Mass Spec Sample Prep Cut From Days to Minutes
The method, developed by Livermore scientists, accommodates liquid samples and bypasses the graphitization process, enabling sample preparation and analysis in minutes.
Cracking the Mysteries of Walnut Research
Researchers with North Carolina State University’s Plants for Human Health Institute have developed a unique methodology for exploring walnut phytochemicals.
BPA Exposure by Infants May Increase Risk of Food Intolerance
Exposure to Bisphenol A at a dose significantly below the current FDA Tolerable Daily Intake predisposes offspring to food intolerance at adulthood.
Tea and Citrus Products Could Lower Ovarian Cancer Risk
New UEA research finds that women who consume foods containing flavonols and flavanones significantly decrease their risk of developing epithelial ovarian cancer.
Novel Solutions to Fight the Obesity Gene
Potent inhibitors a potential new class of anti-obesity drugs that target one of the most common genetic causes of obesity.
Magnesium Cuts Diabetes Risk
Only about half of Americans get the recommended daily amount in their diet.
Why Fruit Flies Love Beer
Yeast cells in beer hitch ride with fruit flies to find new food sources.
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