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用丁酮为衍生试剂，采用萃取气相色谱法测定饮用水中微量无机碘。结果表明：方法的检测限为０．２３μｇ／Ｌ变异系数在４．５－８．２％，回收率在８１．１－１１４％之间。用本法测定不同水样中微量无机碘，取得满意结果。
Butanone was used as a derivatization reagent, and trace inorganic iodine in drinking water was determined by extraction gas chromatography. The results showed that the detection limit of the method was 0.23μg / L, the coefficient of variation was 4.5-8.2% and the recovery was between 81.1-114%. Determination of trace inorganic iodine in different water samples by this method and obtain satisfactory results.