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国内外有关碘分析的报告很多,除仪器分析外,归纳起来不外乎分下列两大类:一类将无机碘化物用饱和溴水氧化为碘酸盐,除去过量的溴,再加足量的碘化钾;用硫代硫酸钠溶液滴定释出的碘,或加淀粉显色用比色法测定。此法测得结果往往偏高,如果样品中碘含量在50微克(指100克样品而言)以下,误差更显著。另一类为Sandell和Kolthoff提出的接触法,此法经过许多学者不断改进,其灵敏度大为增高,据
There are a lot of reports about iodine analysis both at home and abroad. In addition to the analysis of instruments, it can be summed up in the following two categories: one is the oxidation of inorganic iodide with saturated bromine water to iodate to remove excess bromine, Of potassium iodide; titration with sodium thiosulfate solution titration iodine, or add starch colorimetric determination. The result of this method is often high, with a significant error if the iodine content of the sample is below 50 μg (100 g sample). The other is the contact method proposed by Sandell and Kolthoff. This method has been improved continuously by many scholars and its sensitivity is greatly increased. According to