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以亚硫酸盐与光化学反应产生碘的反应， 用于某些食品中痕量亚硫酸盐的测定． 标准加入回收率在 ９８％ ～１０５％ 之间， 相对标准偏差低于 ４％
The reaction of sulfite with photochemical reaction of iodine, used in the determination of trace sulfite in some foods. The standard recovery rate was between 98% ~ 105%, the relative standard deviation was less than 4%