Кислота серная и олеум технические. Определение содержания окислов азота. Спектрофотометрический метод с применением 2,4-ксиленола
Название (англ.):
Sulphuric acid and oleums for industrial use; Determination of oxides of nitrogen; 2,4- Xylenol spectrophotometric method
Описание (англ.):
The method ia applicable of oxide of nitrogen contents equal to or greater than 0,00002 % (m/m). The principle is based on oxidation of nitrous nitrogen to nitric nitrogen by potassium permanganate. Reaction of nitric nitrogen with 2,4-xylenol under specified conditions to form a nitrate derivate. Distillation of the nitrate derivate and absorption in sodium hydroxide solution. Spectrophotometric measurement of the yellow coloured nitrophenol at a wavelength of about 445 nm.
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT NITROGEN NITROGEN OXIDES OLEUM SPECTROPHOTOMETRY SULPHURIC ACID XYLENOL CHEMICAL ANALYSIS AND TESTIN