The method is applicable to products having sodium contents greater than 0.01 % (m/m). The principle consists in the dissolution of a test portion, followed by acidification to ph value 1. Atomization of the obtained solution in the burner of a flame spectrophotometer. Measurement of the intensity of the radiation emitted at 589 nm; comparison with the intensity obtained for standard sodium chloride solutions, the acidity and potassium chloride content of which are equivalent to that of the test solution. - Cancels and replaces ISO Recommendation R 1550-1970.
Số hiệu tiêu chuẩn
ISO 1550
Tên tiêu chuẩn
Potassium hydroxide for industrial use - Determination of sodium content - Flame emission spectrophotometric method
Ngày phát hành
1973-12-00
Tiêu chuẩn tương đương
BS 5634 (1978-12-29), NEQ * NF T20-377 (1977-12-01), IDT * TS 4657 (1985-12-24), IDT * NBN T 03-194 (1980), IDT * NP-1496 (1977), IDT
Từ khóa
Chemical analysis and testing * Chemicals * Determination of content * Emission spectrophotometry * Potassium hydroxide * Sodium * Spectrophotometry
ISO 1550
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