n.（用硫代硫酸钠为滴定剂的）滴定碘法，碘定量法
Compared with the iodometry, spectrophotometry needs less reagents andstabile and safe.
与碘量法相比, 分光光度法试剂用量少、人为因素影响小,对环境和操作者危害小.
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