liquid chromatography News
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ASTM D5296 - 11 standard test method for molecular weight averages and molecular weight distribution of polystyrene by high performance size-exclusion chromatography
General Utility—The molecular weight (MW) and molecular weight distribution (MWD) are fundamental characteristics of a polymer sample. They are used for a wide variety of correlations for fundamental studies, processing, or product applications. For example, the observed MWD is compared to one predicted from assumed kinetics or mechanisms for a polymerization reaction. Differences between ...
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ASTM D7645 - 10e1 Standard Test Method for Determination of Aldicarb, Aldicarb Sulfone, Aldicarb Sulfoxide, Carbofuran, Methomyl, Oxamyl and Thiofanox in Water by Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
This test method has been developed by US EPA Region 5 Chicago Regional Laboratory (CRL). The N-methyl carbamate (NMC) pesticides: aldicarb, carbofuran, methomyl, oxamyl, and thiofanox have been identified by EPA as working through a common mechanism. These affect the nervous system by reducing the ability of enzymes. Enzyme inhibition was the primary ...
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ASTM D7598 - 09e1 Standard Test Method for Determination of Thiodiglycol in Water by Single Reaction Monitoring Liquid Chromatography/Tandem Mass Spectrometry
Thiodiglycol is a Schedule 2 compound under the Chemical Weapons Convention (CWC). Schedule 2 chemicals include those that are precursors to chemical weapons, chemical weapons agents or have a number of other commercial uses. They are used as ingredients to produce insecticides, herbicides, lubricants, and some pharmaceutical products. Schedule 2 chemicals can be found in ...
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ASTM D7645 - 10e1 Standard Test Method for Determination of Aldicarb, Aldicarb Sulfone, Aldicarb Sulfoxide, Carbofuran, Methomyl, Oxamyl and Thiofanox in Water by Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
This test method has been developed by US EPA Region 5 Chicago Regional Laboratory (CRL). The N-methyl carbamate (NMC) pesticides: aldicarb, carbofuran, methomyl, oxamyl, and thiofanox have been identified by EPA as working through a common mechanism. These affect the nervous system by reducing the ability of enzymes. Enzyme inhibition was the primary ...
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ASTM D7600 - 09e1 Standard Test Method for Determination of Aldicarb, Carbofuran, Oxamyl and Methomyl by Liquid Chromatography/Tandem Mass Spectrometry
The N-methyl carbamate (NMC) pesticides: aldicarb, carbaryl, carbofuran, formetanate hydrochloride, methiocarb, methomyl, oxamyl, pirimicarb, propoxur, and thiodicarb have been identified by EPA as working through a common mechanism. They affect the nervous system by reducing the ability of the enzyme cholinesterase. Cholinesterase inhibition was the primary ...
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ASTM D7644 - 10e2 Standard Test Method for Determination of Bromadiolone, Brodifacoum, Diphacinone and Warfarin in Water by Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
This test method has been developed by US EPA Region 5 Chicago Regional Laboratory (CRL). Bromadiolone, brodifacoum, diphacinone and warfarin are rodenticides for controlling mice, rats, and other rodents that pose a threat to public health, critical habitats, native plants and animals, crops, food and water supplies. These rodenticides also present human and ...
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New CRMs for benzo[a]pyrene, indeno[1,2,3-c,d]pyrene and 6-methylchrysene released
The JRC released three Certified Reference Materials (CRMs) of pure benzo[a]pyrene, indeno[1,2,3-cd]pyrene and 6-methylchrysene. These materials will ensure the traceability and comparability of measurements of these three carcinogenic substances in food and in the environment. Polycyclic Aromatic Hydrocarbons (PAH) are a group of substances formed by incomplete burning of biological material. As ...
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First ever matrix Reference Material certified for chlorinated paraffins
Chlorinated paraffins (CPs) are industrial chemicals whose global production is unknown but it is believed to largely exceed 1 million tonnes per year with China as the main player. They are typically sub-divided in three groups: short- (SCCPs), medium- (MCCPs) and long-chain (LCCPs), each of these groups containing thousand isomers. They are categorised as priority environmental pollutants, ...
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Agilent Technologies Enhances Sample-Prep Workbench for Consistent Precision and Safety
Agilent Technologies Inc. (NYSE: A) today introduced a collection of new features to the 7696A Sample Prep Workbench chromatography sample-preparation system. These enhancements will enable laboratories to further minimize bottlenecks associated with sample preparation and maximize automation capabilities to prevent errors associated with manual sample-handling procedures, including weighing, ...
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