because the oxidation ability of ammonium cerous sulfate was affected by acidity and concentration of solution, we discuss and select their optimization.
因为硫酸铈铵溶液的氧化能力与溶液的酸度和浓度有较大的关系,故讨论了溶液的酸度和浓度的选择。
methods:the cerous sulfate reducing reaction was used according to the preventive and curative criteria of iodine deficiency drawn up by who and iccidd.