The Application Notebook-02-11-2011

The Application Notebook

Rapid, Ultra-High Efficiency Pharmacopeia Assay for Ibuprofen Using Kinetex 2.6 µm XB-C18 Core-Shell HPLC/UHPLC Column

February 11, 2011

Pharmaceutical

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Application of core-shell technology to the USP assay for ibuprofen to reduce analysis time and increase sample throughput and productivity, while improving the sensitivity of the assay for the determination of ibuprofen related compound C, a known degradation product with adverse health effects.

PCDD/F Screening at the Maximum Residue Level for Food Safety Analysis Using Highly Selective Triple Quadrupole GC–MS-MS

February 11, 2011

Food and Beverage

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The method described employs a triple quadrupole mass spectrometer equipped with hyperbolic quadrupole rods for increased selectivity to prerform a trace level screening method for PCDD/Fs and PCBs and follows the well-established United States Environmental Protection Agency (US EPA) Method 1613A.

Analysis of PAHs in Infant Formula Using QuEChERS Extraction and Comprehensive Two-Dimensional Gas Chromatography (GCxGC)

February 11, 2011

Food and Beverage

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The QuEChERS method of food sample preparation was used in conjunction with comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry (GCxGC–TOFMS) to successfully identify PAH contaminants spiked in liquid commercial infant formula.

GPC Clean-up for Pesticide Residue in Fatty Food

February 11, 2011

Food and Beverage

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AGPC column and organic solvents are used to selectively pass large macro molecules such as lipids, resins, waxes, and other compounds from sample extracts while retaining the smaller target analyte molecules in the pores of the gel.

Flexible Fused Silica Capillary: Packaging Considerations

February 11, 2011

General

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Flexible synthetic fused silica capillary is routinely supplied to the market in long continuous lengths on low cost Styrofoam or plastic spools.

Determination of Chelating Agents in Wastewater

February 11, 2011

Environmental

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Aminopolycarboxylate chelating agents form stable complexes with transition metals, thereby increasing metal solubility, preventing metal-catalyzed reactions, and removing heavy metal contamination in soil remediation.

Base Hydrolysis and Accelerated Solvent Extraction (ASE): Determination of Total Fat from Dairy Products

February 11, 2011

Food and Beverage

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This application note demonstrates the extraction of sour cream, cream cheese, coffee creamer, heavy whipping cream, and low fat milk using an ASE 350 Accelerated Solvent Extractor technique developed by Dionex and compares results to the traditional Mojonnier technique.

Determination of Anthelmintic Drug Residues in Milk Using Ultra High Performance Liquid Chromatography–Tandem Mass Spectrometry

February 11, 2011

Food and Beverage

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A modified QuEChERS-type extraction method is used with an additional concentration step to detect 38 anthelmintic (nematicides, flukicides, endectocides) drug residues, consisting of benzimidazoles, avermectins, and flukicides in milk. UHPLC–MS-MS instrumentation detects most analytes at

The Application Notebook: Ten Years Strong

February 11, 2011

From the Publisher

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This February 2011 edition of The Application Notebook is the 10th Anniversary of publishing these supplements and further affirms the valuable service they perform in the chromatography community.