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.

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Nessler reagent is aliphatic amide detection and provides an orange-brown colloid when paracetamol is added.

Design of Optical Sensor Membrane Based on Polymer Poly(methyl methacrylate) for Paracetamol Detection in Traditional Herbal Medicine

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]).