Английская Википедия:3,5-Dinitrosalicylic acid

Материал из Онлайн справочника
Перейти к навигацииПерейти к поиску

Шаблон:Chembox

3,5-Dinitrosalicylic acid (DNS or DNSA, IUPAC name 2-hydroxy-3,5-dinitrobenzoic acid) is an aromatic compound that reacts with reducing sugars and other reducing molecules to form 3-amino-5-nitrosalicylic acid, which strongly absorbs light at 540 nm. It was first introduced as a method to detect reducing substances in urine by James B. Sumner[1] and has since been widely used, for example, for quantifying carbohydrate levels in blood.[2] It is mainly used in assay of alpha-amylase. However, enzymatic methods are usually preferred due to DNS's lack of specificity.[3]

Synthesis

3,5-Dinitrosalicylic acid can be prepared by the nitration of salicylic acid.[4]

Файл:3,5-Dinitrosalicylic acid synthesis01.svg

References

Шаблон:Reflist


Шаблон:Aromatic-stub

  1. Sumner, J.B. Dinitrosalicylic acid: a reagent for the estimation of sugar in normal and diabetic urine. Journal of Biological Chemistry 47, 5, 1921.
  2. Шаблон:Cite web
  3. Шаблон:Cite journal
  4. Thiel, W.; Mayer, R.; Jauer, E.-A.; Modrow, H.; Dost, H.: Synthesis and Spectral Characterization of Blue Dyes of the Benzene Series in J. Prakt. Chem. (Leipzig) 328 (1986) 497-514, Шаблон:Doi.