Food and Beverage Analysis

AB Sciex Application Note

Metrohm Application Note

PerkinElmer Application Note

Agilent Technologies Application Note

A robust, selective and sensitive separation method for the determination of four steviol glycosides in stevia plant matrix is demonstrated. In addition to the two calibrated substances two more glycosides could be found in stevia plant extracts by LC–MS. Using a popular Eurospher NH2 phase and applying moderate separation conditions results in an inexpensive and precise analysis method.

PerkinElmer Application Note

Using narrow-bore column fast GC combined with rapid scanning qMS to analyse flavours and fragrances is described.

Practical HPLC, HILIC and RP-LC methods of analysing common food and beverages containing polyphenols are presented.

Phenomenex Application Note

We spoke to Waters about the development of an international food safety training laboratory set to open next year and how this will help specialists meet global standards.

Furan is naturally occurring at low levels in many foods and drinks (1).

An overview of current chromatography-based food toxicant screening is presented.

Agilent Poroshell 120, a superficially porous particle column, offers resolution and speed similar to columns packed with 1.8-µm totally porous particles, without generating high back pressure.

AB SCIEX Application Note

This paper describes the use of the AB SCIEX TripleTOFTM 5600 LC–MS-MS system for targeted and nontargeted screening for pesticide residue in food samples.

Participants in this Technology Forum are Deanna Hurum of Dionex Corporation, Sue Steinike of Shimadzu Scientific Instruments, and Gerry Broski and Eric Phillips of Thermo Fisher Scientific.

Thermo Fisher Scientific has announced that its global Food Safety Response Centre in Dreieich, Germany, has developed two new analytical screening methods in response to the oil spill in the Gulf of Mexico.

Participants in this Technology Forum are Deanna Hurum of Dionex Corporation, Sue Steinike of Shimadzu Scientific Instruments, and Gerry Broski and Eric Phillips of Thermo Fisher Scientific.

Michal Godula, Food Safety Specialist from Thermo Fisher Scientific answers questions on food safety testing.

The safety of the food that our children eat is a global concern. Regulations are in place that limit the maximum level of pesticides that can be present in food meant for children, and methods to detect levels well below those limits are needed to ensure the safety of the food supply. Combining the speed and separation efficiency of ultrahigh-pressure liquid hromatography (UHPLC) with the sensitivity and selectivity of triple-quadrupole mass spectrometry (MS)-MS results in a method that can deliver ultralow quantification of pesticides in baby food, with limits of detection more than an order of magnitude below the allowed maximum levels.

Peas, beans and some other plant seeds contain proteins, called globulins, which have been shown to act as a defence against insects and other herbivores. Coffee beans contain large amounts of globulins, so scientists in Brazil studied the beans to assess their potential for warding off insects.

A method is presented for the analysis of epicatechin (EC), epigallocatechin (EGC), epigallocatechingallate (EGCG), myricetin, quercetin, keampferol and cis and trans resveratrol. An ALEXYS Analyzer is used with a binary gradient. Detection limits of 2-5 nmole/L have been obtained.

Coelutions using one dimensional chromatography are often observed in flavour and fragrance analysis.

Generic methods based upon chromatography with full-scan mass spectrometry (MS) detection are maturing.

Some of the threats to food safety and the measures in place for protection are discussed

Two-dimensional polyacrylamide gel electrophoresis reveals regulatory effects of dietary polyunsaturated fatty acid supply on protein expression in early development.

The authors use headspace SIFT-MS to target and identify volatiles in various malt aldehydes. The specificity and speed are compared to current methodology.

Large-volume Injection Coupled to Comprehensive Gas Chromatography – Time-of-Flight Mass Spectrometry for the Analysis of 3-MCPD Esters in Edible Oils

An overview of current chromatography-based food toxicant screening is presented.

Polychlorinated biphenyls (PCBs) are a class of extremely persistent industrial chemicals manufactured for use in electrical transformers, capacitors, inks, paints, pesticides, dust control or insulating fluids. Estimates have put the total global production of PCBs on the order of 1.5 million tons.