It is mainly used as a reagent for various alkaloids, nitrogenous bases, phenols, proteins, peptones, amino acids, uric acid, urea, blood and carbohydrates. Biological staining.
(1) Catalysts for organic synthesis reactions mainly replace liquid acids with serious environmental pollution, such as sulfuric acid, hydrofluoric acid, aluminum trichloride, etc. at home. s concern;
(2) Biochemical reagents and chromatographic analysis reagents: in the separation and identification of drugs, toxicological research on chemical poisons, forensic identification and analysis of biological materials, they are widely used as precipitants, oxidants and chromogenic agents, such as the analysis of atropine, amino For bilin, quinine, procaine and cocaine, etc., the ethanol solution of phosphotungstic acid is needed to detect steroids by thin-layer chromatography; through the analysis of generated phosphotungstic acid, identify phosphorus in fruits, vegetables, plants and food pesticides.
(3) It is mainly used as a biochemical reagent, and also used to make pigments, etc. Phosphotungstic acid is used to precipitate proteins, plant alkaloids and certain amino acids. Compared with the insolubility of potassium phosphotungstate and ammonium phosphotungstate, sodium phosphotungstate can be used as a reagent in quantitative analysis due to its solubility.
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