Food and Beverage Analysis

The continual increase in sample numbers in busy labs means that it is often difficult for quality control or contract analysis labs to maintain short turnaround times, particularly when instruments are already running at full capacity. To address the need for faster analysis while retaining the quality of separation offered by dedicated amino acid analysers, an improved formulation of sodium citrate based buffers has been developed by Biochrom.

Brian De Borba and Jeffrey S. Rohrer, Dionex Corporation

Brian De Borba and Jeffrey S. Rohrer, Dionex Corporation

William Goodman and Thomas Meaker, PerkinElmer Life and Analytical Sciences

Users need to understand not only the operation of the computer system as required by their access privileges, but also the ethics and integrity required operating under any of the GMP or GLP quality systems.

Gas chromatography (GC) coupled to time-of-flight mass spectrometry (TOF-MS) offers unique solutions for various analytical applications including the analysis of food quality, authenticity and safety markers. This article provides a general overview of TOF-MS basic features, highlighting its advantages and limitations compared with GC using conventional mass analyzers. Examples of recent results obtained for selected food contaminants and flavor components are described to illustrate the potential of this recently introduced technique.

Gas chromatography (GC) coupled to time-of-flight mass spectrometry (TOF-MS) offers unique solutions for various analytical applications including the analysis of food quality, authenticity and safety markers. This article provides a general overview of TOF-MS basic features, highlighting its advantages and limitations compared with GC conventional mass analyzers. Examples of recent results obtained selected food contaminants and flavor components are described illustrate the potential of this recently introduced technique.

Gas chromatography (GC) coupled to time-of-flight mass spectrometry (TOF-MS) offers unique solutions for various analytical applications including the analysis of food quality, authenticity and safety markers. This article provides a general overview of TOF-MS basic features, highlighting its advantages and limitations compared with GC using conventional mass analysers. Examples of recent results obtained for selected food contaminants and flavour components are described to illustrate the potential of this recently introduced technique.

The analysis of peptides and additives using a new HPLC innovative column technology, Pathfinder, was shown. For the analysis of flavours in lemon juice GC–MS with a new MS library, FFNSC, with linear retention indices was used.

Soft drink formulas often include preservatives, artificial sweeteners, flavours or caffeine in their list of ingredients. Using the Acclaim OA column, as many as eight common additives may be determined in a single run. Many of these additives are hydrophilic organic acids for which this column was designed. Notably, benzoate and sorbate, which do not resolve on C18 columns at low pH, are fully separated.

Ultrahigh performance liquid chromatography (LC)–time-of-flight mass spectrometry –(TOF-MS) and gas chromatography (GC)–TOF-MS are powerful approaches for screening target compounds and identifying or characterizing nontarget compounds in complex mixtures. The combination of accurate mass data and newly developed software enables truly generic screening methods with TOF-MS, and the confident detection, identification, and confirmation of small molecules in a range of application areas.

Any wine can suffer from that corked wine taint. This spoilage, recognized by a distinct aroma of damp musty leaves and a damp cardboard taste, makes a wine undrinkable.

VICAM, the food safety technology business, headquartered in Watertown, Massachusetts, USA, has been acquired by Waters. The deal also included the associated net assets of VICAM and has proceeded under undisclosed terms.

To utilize the power of the Waters® UltraPerformance Liquid Chromatography (UPLC®) System combined with the fast MS acquisition rates of the Xevo™ TQ Mass Spectrometer for rapid determination and confirmation of pesticide residues in baby food.

As the global sourcing of foodstuffs becomes more common, the number of pesticide analyses performed continues to increase to test these sources for compliance with various regulations. The sheer number of analyses dictates that utilized methods must be reliable, robust and inexpensive.

Restek Corporation. For more information, visit the company's website at www.restekcorp.com.

Co-occurrence of several mycotoxins (deoxynivalenol, zearalenone, T-2-toxin, HT-2 toxin) produced by field fungi, such as Fusarium graminearum and Fusarium culmorum, requires several analysis methods for their characterization. A reliable method for the determination of type A- and B-trichothecenes and zearalenone in cereal-based samples is presented. To achieve optimal mass spectrometric detection, electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) were compared. Best results were obtained with ESI by implementing a two-period switching for the ionization polarity. The limit of quantification differs for each individual substance within the range 1–10 ppb. Mean recoveries using a standardized clean-up procedure were in the 54–93% range.

Maltodextrin is an easily digested carbohydrate made from corn starch...

The number of pesticides used in agriculture world-wide is approx. 700...

A positive chemical ionization GC?MS method for the analysis of acrylamide monomer in foods will be described . . .

The authors report the use of LC–MS for monitoring triterpenes in oak heartwoods, wines, and spirits.

Tivadar Farkas and Jafar Toulouee, Phenomenex Inc.

This article reports the application of the SPE-chiral ligand-exchange chromatography technique to monitor D-lactic acid formation during the alcoholic fermentation of white grape must.

The current concern over acrylamide levels in food has unexpectedly brought amino acid analysis to the forefront . . .

This column describes the principles of stir-bar sorptive extraction and presents some typical applications.

HPLC analysis of glycerol in wine using evaporative light-scattering detection. (Shimadzu Scientific Instruments, Inc.)

Capillary GC analysis of a wine sample.

The authors determined the presence of 26 organophosphorus pesticides in apple and carrot samples using accelerated solvent extraction.