简介:Determination of the chemical oxygen demand above concentration of 15 mg/l. In the case of undiluted samples the procedure can be used up to 300 mg/l. The chloride contents of the undiluted sample must not exceed 1 g/l. 简介:Determination of the chemical oxygen demand above concentration of 15 mg/l. In the case of undiluted samples the procedure can be used up to 300 mg/l. The chloride contents of the undiluted sample must not exceed 1 g/l. Apart from that, the work should be performed according to the procedure laid down in Part 41-2.详细>