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Comprehensive Pesticide Residue Analysis by LC/MS/MS

Restek Corp.
12 Mar 2018

With recent contamination issues in a wide range of commodities, ensuring the quality of our food supply is becoming increasingly important. Pesticide residue content is one area of concern. LC/MS/MS can be used to simultaneously monitor hundreds of potential contaminants—including those difficult to detect by GC. Using both LC/MS/MS and GC approaches allows for a faster, more complete picture of pesticide residues.

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Ultra Aqueous C18 Columns

Restek Corp.

The Ultra line represents Restek’s broadest selection of stationary phases on a single silica support. Made of high-purity, type-B silica that minimizes activity and creates high-density bonding, these columns are designed for selective and reliable HPLC applications.The Ultra Aqueous C18 HPLC column provides reproducible retention times and can be used with highly aqueous mobile phases, which may eliminate the need for sample derivitization or ion pairing reagents. This column features a true C18 alkyl bonded phase, meeting the requirements of a US Pharmacopoeia (USP) L1 stationary phase.The Ultra Aqueous C18 column uses a novel bonding chemistry that results in polar groups at the silica surface. These surface polar groups keep the alkyl stationary phase extended, and thus wetted by the mobile phase—even when using up to 100% aqueous mobile phases.Additionally, although the Ultra Aqueous C18 column behaves similarly to a traditional base-deactivated C18 column when analyzing neutral hydrophobic compounds, it has enhanced retention and unique selectivity for polar and basic compounds.Ultra Aqueous C18 Columns Features: Analyzes polar compounds by reversed phase. Retains compounds such as amino acids and water soluble vitamins using simple mobile phases and without derivitization. Analyzes polar, hydrophillic materials without retention time loss. Stable retention in 100% aqueous mobile phases. Can analyze compounds that are sparingly soluble in organic solvents. True C18 alkyl bonded phase. High-density C18 ligand coverage. Similar selectivity as traditional C18 phases for neutral hydrophobic compounds. Unique secondary polar characteristics. End-capping diminishes peak tailing observed from exposed silanol sites on the silica surface. Column Characteristics: Phase: C18 particle Size: 3, 5 μm Pore Size: 100 Å Length: 30, 50, 100, 150, 200, 250 mm ID: 0.3, 1.0, 2.1, 3.0, 3.2, 4.6 mm

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LC-MSLC-MS (liquid chromatography-mass spectrometry) systems and equipment are used for separation and quantitative analysis of complex mixtures, combining liquid chromatography and mass spectrometry. Quantify proteins, contaminants, pesticides or screen for drug metabolites with a high level of sensitivity. LC-MS systems and equipment include reverse phase, normal phase and specialized columns integrated with various MS detectors such as time-of-flight (TOF), quadrupole, orbitrap or ion trap mass analyzers. LC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzer give greater sensitivity and resolving power to your analysis. Find the best LC-MS equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Environmental Monitoring and TestingEnvironmental monitoring and testing uses handheld portable analyzers, kits, spectrometers or chromatography systems for air, water, soil, food and other sample testing. Useful features of analyzers such as BOD and COD include portability, easy calibration, automation and sensitivity.  Environmental test kits for pH, water, moisture, etc, should be accurate, sensitive, reliable, fast and easy to use.GC-MS GC-MS (gas chromatography-mass spectrometry) instruments and equipment are used to separate, quantify and identify mixtures of small and volatile compounds, such as polycyclic aromatics, fatty acids and alcohols. Often used in drug detection, forensic investigation and environmental analysis for pesticides and contaminants, GC-MS is a powerful addition to your lab’s analytical capabilities. GC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzers can give greater sensitivity and resolution to your analysis. Find the best GC-MS instruments and equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.PesticidesPesticides are used to protect crops from diseases, pests and unwanted plants. They are classed as persistent organic pollutants (POPs) and can be harmful to humans. The Environmental Protection Agency (EPA) currently regulates the use of pesticides in the USA. Food SafetyFood safety describes the prevention of food-borne illnesses. Contamination with a variety of pathogens can be prevented with adequate temperature control, hygiene and labeling. Food samples can be tested using GC/MS, HPLC, SPE, and qPCR to ensure their adherence to regulations.GC-MSGas Chromatography-Mass Spectrometry (GC-MS) combines the separation power of gas chromatography with the detection capabilities of mass spectrometry, allowing for the analysis of complex mixtures. It is widely used in environmental, forensic, and pharmaceutical analysis. Explore GC-MS systems in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.

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