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  2. Urine test strip - Wikipedia

    en.wikipedia.org/wiki/Urine_test_strip

    A standard urine test strip may comprise up to 10 different chemical pads or reagents which react (change color) when immersed in, and then removed from, a urine sample.The test can often be read in as little as 60 to 120 seconds after dipping, although certain tests require longer.

  3. Nitrite test - Wikipedia

    en.wikipedia.org/wiki/Nitrite_test

    A nitrite test is a standard component of a urinary test strip. A positive test for nitrites in the urine is called nitrituria. This test is commonly used in diagnosing urinary tract infections (UTIs). A positive nitrite test indicates that the cause of the UTI is a Gram-negative organism, most commonly Escherichia coli. The reason for nitrites ...

  4. Urinalysis - Wikipedia

    en.wikipedia.org/wiki/Urinalysis

    The test pad contains a polyelectrolyte that releases hydrogen ions in proportion to the concentration of ions in the sample. The consequent pH change is measured using a pH indicator. The reading obtained from reagent strips, as opposed to refractometers, is not affected by substances such as glucose, urea and contrast dyes. Falsely low ...

  5. Griess test - Wikipedia

    en.wikipedia.org/wiki/Griess_test

    The Griess test is an analytical chemistry test which detects the presence of nitrite ion in solution. One of its most important uses is the determination of nitrite in drinking water . The Griess diazotization reaction, on which the Griess reagent relies, was first described in 1858 by Peter Griess .

  6. Azobilirubin - Wikipedia

    en.wikipedia.org/wiki/Azobilirubin

    Azobilirubin is a coloured compound formed by the condensation of diazotized sulfanilic acid with bilirubin in the van den Bergh reaction. [1] The quantity of bilirubin in patients with jaundice can be determined by the formation of azobilirubin in the presence of methanol.

  7. Azobenzene - Wikipedia

    en.wikipedia.org/wiki/Azobenzene

    Azobenzene is a photoswitchable chemical compound composed of two phenyl rings linked by a N=N double bond.It is the simplest example of an aryl azo compound.The term 'azobenzene' or simply 'azo' is often used to refer to a wide class of similar compounds.

  8. Test strip - Wikipedia

    en.wikipedia.org/wiki/Test_strip

    A test strip is a band/piece/strip of paper or other material used for biological testing. Specifically, test strip may refer to: Food testing strips; Glucose meter test strip; Lipolysis test strip; Urine test strip; Universal indicator pH test strips; It may also refer to: Teststrip, an art gallery in Auckland, New Zealand

  9. Cannabis drug testing - Wikipedia

    en.wikipedia.org/wiki/Cannabis_drug_testing

    The antibody will then react with the drug-protein conjugate and a visible colored line will show up in the test line region of the specific drug strip. [ citation needed ] Cannabis use is included in the "10-panel urine screen", as well as the "SAMHSA-5", the five drugs tested for in standard NIDA approved drug tests.