Medical dictionary. 2011.
Nitrite test — A nitrite test is a chemical test used to determine the presence of nitrite ion in solution. A common nitrite test can be performed by adding 4 M sulfuric acid to the sample until acidic, and then adding 0.1 M iron(II) sulfate to the solution. A… … Wikipedia
test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… … Medical dictionary
Nitrate test — For the test to determine the ability of microbes to reduce nitrate to nitrite, see Nitrate reductase test. A nitrate test is a chemical test used to determine the presence of nitrate ion in solution. Testing for the presence of nitrate via wet… … Wikipedia
nitrate reduction test — (for bacteriuria or presence of bacteria in other fluids) a type of nitrite test that identifies the reduction of nitrate to nitrite by a bacterial culture. The fluid under investigation is cultured in a broth containing nitrate and the medium is … Medical dictionary
Griess test — The Griess test is a chemical analysis test which detects the presence of organic nitrite compounds. The Griess diazotization reaction on which the Griess reagent relies was first described in 1858 by Peter Griess. MethodNitrite is detected and… … Wikipedia
Nitrate reductase test — The nitrate reductase test is a test to differentiate between bacteria based on their ability or inability to reduce nitrate (NO3−) to nitrite (NO2−) using anaerobic respiration. Procedure Various assays for detecting nitrate reduction have been… … Wikipedia
Drug test — For other uses, see Drug testing (disambiguation). Drug test Diagnostics To minimize opportunities for tampering, a direct line of sight between the observer and the specimen bottle must be maintained during collection of a urine sample … Wikipedia
Chemical test — In chemistry, a chemical test is a qualitative or quantitative procedure designed to prove the existence of, or to quantify, a chemical compound or chemical group with the aid of a specific reagent. A presumptive test is specifically used in… … Wikipedia
van den Bergh's test — a test to determine whether excess bilirubin in the blood is conjugated or unconjugated, and therefore whether jaundice in a patient is due to haemolysis or to disease of the liver or bile duct. A sample of serum is mixed with sulphanilic acid,… … Medical dictionary
Griess test — 1. (for nitrate reducing bacteria in a fluid) a formerly common test in which sulfuric acid and an indicator were added to a dilute solution and color change was assessed. 2. the same name is now applied to nitrite tests for bacteriuria in which… … Medical dictionary
