Nessler reagent

Ness·ler re·a·gent

(nes'lĕr),
a solution of potassium hydroxide, mercuric iodide, and potassium iodide; it yields a yellow color with ammonia (a brown precipitate with larger amounts) that can be used for quantitative assay.

Nessler,

A., German chemist, 1827-1905.
Nessler reagent - a solution of potassium hydroxide, mercuric iodide, and potassium iodide.
References in periodicals archive ?
Nessler reagent is aliphatic amide detection and provides an orange-brown colloid when paracetamol is added.
Examples of these tests are chemical oxygen demand (COD), a measurement of oxidizable material in a sample by forced oxidation with potassium dichromate ([K.sub.2][Cr.sub.2][O.sub.7]), in sulfuric acid, biochemical oxygen demand (BOD), all estimate of the availability of food in a sample expressed in terms of microbial oxygen use over a five-day incubation period and ammonia-nitrogen (N[H.sub.3]-N), a ammonia nitrogen determination by sample reaction in alkaline conditions with Nessler reagent, potassium tetraiodomercurate ([K.sub.2]Hg[I.sub.4]).