Chemical test 1596221 210291348 2008-05-05T10:07:28Z Dust429 6765108 test for fat In [[chemistry]], a '''chemical test''' is [[qualitative]] or [[quantitative]] procedure designed to prove the existence of, or to quantify, a [[chemical compound]] or [[substituent|chemical group]] with the aid of a specific [[reagent]]. A [[presumptive test]] is specifically used in medical science. ==Biochemical tests== * [[Clinistrip]]s quantitatively test for [[sugar]] in [[urine]] * The [[Kastle-Meyer test]] tests for the presence of [[blood]] * [[Salicylate testing]] is a category of drug testing that is focused on detecting salicylates such as acetysalicylic acid for either biochemical or medical purposes. * [[Tincture of iodine|Iodine solution]] tests for [[starch]] * The [[Van Slyke determination]] tests for specific [[amino acid]]s * The [[Zimmermann test]] for Ketosteroids * [[Seliwanoff's_test]] for differentiating between aldose and ketose sugars * Test for [[fat]]: add [[ethanol]] to sample, then shake; add water to the solution, and shake again. If fat is present, the product turns MILKY WHITE. ===Reducing sugars=== * [[Barfoed's test]] tests for reducing [[monosaccharide]]s or [[disaccharide]]s * [[Benedict's reagent]] tests for [[reducing sugar]]s or [[aldehyde]]s * [[Fehling's solution]] tests for [[reducing sugar]]s or [[aldehyde]]s, similar to [[Benedict's reagent]] * [[Molisch's test]] for carbohydrates ===Proteins and polypeptides=== * The [[Bicinchoninic acid assay]] tests for [[protein]]s * [[Biuret reagent]] tests for [[protein]]s and [[polypeptide]]s * [[Bradford protein assay]] measures [[protein]] quantitatively ==Organic tests== * The [[Carbylamine reaction]] tests for primary [[amine]]s * The [[Griess test]] tests for organic nitrite compounds * The [[Iodoform reaction]] tests for the presence of methyl [[ketone]]s, or compounds which can be oxidized to methyl ketones * The [[Schiff test]] detects [[aldehyde]]s * [[Tollens' reagent]] (Silver Mirror) tests for [[aldehydes]] * The [[Zeisel determination]] tests for the presence of [[ester]]s or [[ether]]s *[[Lucas' reagent]] is used to determine mainly between [[primary alcohol|primary]], [[secondary alcohol|secondary]] and [[tertiary alcohol|teriary]] alcohols. ==Inorganic tests== * [[Barium chloride]] tests for [[sulfate]]s * The [[Beilstein test]] tests for [[halide]]s qualitatively * [[Borax bead test]] tests for certain [[metal]]s * The [[Carius halogen method]] measures [[halide]]s quantitatively * [[Chemical test for cyanide]] tests for the presence of [[cyanide]], CN<sup>-</sup> * [[Copper sulfate]] tests for presence of water * [[Flame test]]s test for [[metal]]s * The [[Gilman test]] tests for the presence of a [[Grignard reagent]] * The [[Kjeldahl method]] quantitatively determines the presence of [[nitrogen]] * [[Nessler's reagent]] tests for the presence of [[ammonia]] * [[Ninhydrin]] tests for [[ammonia]] or primary [[amine]]s * The [[sodium fusion test]] tests for the presence of [[nitrogen]], [[sulfur]], and [[halide]]s in a sample * The [[Zerewitinoff determination]] tests for any acidic hydrogen ==References== <references/> [[Category:Chemical tests]] [[Category:Analytical chemistry]]