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本文在酸性过氧化氢-碘化钾溶液中,加入抗坏血酸产生Landolt反应。钼(Ⅵ)和铁(Ⅲ)可催化此反应。由诱导期测得钼(Ⅵ)铁(Ⅲ)总量,然后用EDTA掩蔽铁(Ⅲ)测得钼(Ⅵ)量,用差减法测得铁(Ⅲ)量。实验结果满意。
In this paper, acidic hydrogen peroxide - potassium iodide solution, adding ascorbic acid Landolt reaction. Molybdenum (Ⅵ) and iron (Ⅲ) catalyze this reaction. The amount of iron (Ⅲ) was determined from the induction period and the amount of molybdenum (Ⅵ) was determined by masking iron (Ⅲ) with EDTA. The amount of iron (Ⅲ) was determined by subtractive subtraction. Experimental results are satisfactory.