Using potassiumpermanganatemethod the total amount of chrome in boiled water heated by speedy heater was determined.
用酸性高锰酸钾氧化法对用“热得快”烧的开水进行了总铬的测定。
2
Sodium formate from waste alkali liquor was analyzed by perchloric acid nonaqueous titration instead of potassiumpermanganatemethod, which caused larger deviation.
采用高氯酸非水滴定法分析废碱液中的甲酸钠，代替了误差较大的高锰酸钾法。
3
The uncertainty of measurement was evaluated for the determination of permanganate index of water by the method of GB 11892-1989, the acidic potassiumpermanganatemethod.