Covers a method applicable to liquid or solid products having mercury contents greater than 0,05 mg/kg. The principle of determination is based on oxidation of the mercury contained in a test portion to mercury(II) ions by potassium permanganate in the presence of sulphuric acid, reduction of the excess oxidant, extraction in chloroform of the complex formed, and photometric measurement of the complex at a wavelength of about 490 nm.
Số hiệu tiêu chuẩn
ISO 5992
Tên tiêu chuẩn
Sodium hydroxide for industrial use - Determination of mercury content - Dithizone photometric method
Ngày phát hành
1979-09-00
Tiêu chuẩn tương đương
BS 6075-10 (1981-02-27), IDT * NF T20-434 (1980-06-01), IDT * UNE 55613 (1984-04-15), NEQ * TS 4678 (1986-01-21), IDT * NBN T 03-134 (1980), IDT * NS 9050 (1981), MOD
Từ khóa
Chemical analysis and testing * Determination of content * Dithizone * Mercury * Photometry (chemical analysis) * Sodium hydroxide * Spectrophotometry
ISO 5992
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