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Test and measurement instrumentation for electromagnetic compatibility (EMC) testing Feb 10, 2014 VTI Instruments [63] High precision test and measurement instrumentation June 20, 2014 Zygo Corporation [64] Non-contact optical metrology Aug. 5, 2014 AMPTEK, Inc. [65] X-ray detectors using x-ray fluorescence (XRF) Aug. 5, 2014 Luphos GmbH [66]
All analytical procedures should be validated. Identification tests are conducted to ensure the identity of an analyte in a sample through comparison of the sample to a reference standard through methods such as spectrum, chromatographic behavior, and chemical reactivity. [5] Impurity testing can either be a quantitative test or a limit test.
English: European Inventory of Existing Commercial Chemical Substances (EINECS) Commission communication pursuant to Article 13 of Council Directive 67/548/EEC of 27 June 1967 on the approximation of the laws, regulations and administrative provisions relating to the classification, packaging and labelling cf dangerous substances, as amended by Directive 79/831/EEC
Pure standards are most likely to be prepared by chemical synthesis and purification and characterized by determination of remaining impurities. [1] This is often done by commercial producers. Natural matrix CRMs (often shortened to 'matrix CRMs') contain an analyte or analytes in a natural sample (for, example, lead in fish tissue).
The ZINC database (recursive acronym: ZINC is not commercial) is a curated collection of commercially available chemical compounds prepared especially for virtual screening. ZINC is used by investigators (generally people with training as biologists or chemists ) in pharmaceutical companies , biotechnology companies , and research universities .
SDF is one of a family of chemical-data file formats developed by MDL; it is intended especially for structural information. "SDF" stands for structure-data format, and SDF files actually wrap the molfile (MDL Molfile) format. Multiple records are delimited by lines consisting of four dollar signs ($$$$). A key feature of this format is its ...
ACS grade is the highest level of purity, and meets the standards set by the American Chemical Society (ACS). The official descriptions of the ACS levels of purity is documented in the Reagent Chemicals publication, issued by the ACS. [3] [4] It is suitable for food and laboratory uses. Reagent grade is almost as stringent as the ACS grade.
Polyquaternium-7 is applied in waste treatment for laundry, emulsion breaking, sludge dewatering and drainage and retention aid. It is a cationic polyelectrolyte. [3] Polyquaternium-7 is used as modifier, for example in shampoo, hair conditioner, hair spray, mousse, soap, gel, styling agent, shaving product, deodorant and antiperspirant. [4]