Search results
Results from the WOW.Com Content Network
A methylene blue active substances assay, or MBAS assay, is a colorimetric analysis test method that uses methylene blue to detect the presence of anionic surfactants (such as a detergent or foaming agent) in a sample of water. An anionic surfactant detected by the color reaction is called a methylene blue active substance (MBAS). [1]
The Carius halogen method measures halides quantitatively. [1] Chemical tests for cyanide test for the presence of cyanide, CN −; Copper sulfate tests for the presence of water; Flame tests test for metals; The Gilman test tests for the presence of a Grignard reagent; The Kjeldahl method quantitatively determines the presence of nitrogen
In education, "alternative assessment" is in direct contrast to what is known as "traditional testing" "traditional assessment," or "standardized assessment." Instead of traditional selected-response or constructed-response tests that look for discrete facts or knowledge students recall in a standard way, students can apply knowledge in ...
A list of chemical analysis methods with acronyms. A. Atomic absorption ... High performance liquid chromatography-IR spectroscopy ... Analytical chemistry;
The Interagency Coordinating Committee on the Validation of Alternative Methods (ICCVAM) coordinates U.S. federal government evaluation of new, revised, and alternative test methods. Alternative methods are methods for safety testing of chemicals and chemical products that use fewer or no animals or that minimize or prevent animal pain and ...
Spoilers ahead! We've warned you. We mean it. Read no further until you really want some clues or you've completely given up and want the answers ASAP. Get ready for all of today's NYT ...
The sodium fusion test, or Lassaigne's test, is used in elemental analysis for the qualitative determination of the presence of foreign elements, namely halogens, nitrogen, and sulfur, in an organic compound. It was developed by J. L. Lassaigne. [1] The test involves heating the sample with sodium metal, "fusing" it with the sample. A variety ...
Placement testing is a practice that many colleges and universities use to assess college readiness and determine which classes a student should initially take. Since most two-year colleges have open, non-competitive admissions policies, many students are admitted without college-level academic qualifications.