METHOD DETERMINING ISOPROPYLNITRATE IN SEWAGE Russian patent published in 1997 - IPC

FIELD: analytical chemistry, spectrophotometric methods of detection of isopropylnitrate in sewage of working zone of enterprises of chemical industry. SUBSTANCE: method consists in that sample is treated with color reagent - aqueous solution of mixture of salicylic acid and sodium salicylate taken in mass proportion 1.0:(10.0-11.0). Then solution is evaporated to dryness, residue is dissolved in concentrated sulfuric acid, water is added as well as ammonia solution. Obtained solution is scanned photometrically in region of absorption band with maximum on 360 nm. EFFECT: decreased time of analysis and relative cheapness of method. 1 dwg, 1 tbl