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锰离子在酸性或碱性介质中,催化高碘酸钾氧化孔雀绿产生褪色反应。经试验表明,提高溶液的酸度与温度,可使反应速度加快。本法选用pH3.8、显色温度33℃、显色时间1—1.5小时为反应条件,以氟化钠消除铝、铁离子的干扰。对50纳克锰,其它离子共允量(毫克)为:钙、镁、钠(2),钾(1),钡、锶、钛(Ⅳ)(0.5),锌、铬(Ⅳ)、镍(0.25),钒(Ⅴ)、锡(Ⅳ)、钼(Ⅵ)、钨(Ⅵ)、钴(Ⅱ)、
Manganese ions catalyze the oxidation of malachite green by potassium periodate in an acidic or alkaline medium to produce a discoloring reaction. The tests show that increasing the acidity and temperature of the solution can make the reaction faster. The method selected pH3.8, the color temperature of 33 ° C, the color time of 1-1.5 hours as the reaction conditions to eliminate the interference of aluminum and iron fluoride sodium fluoride. For 50 nanograms of manganese, the total amount of other ions (milligrams) is: Calcium, Magnesium, Sodium (2), Potassium (1), Barium, Strontium, Titanium (Ⅳ) (0.25), vanadium (V), tin (Ⅳ), molybdenum (Ⅵ), tungsten (Ⅵ), cobalt