基于Ｉ－能被氧化生成ＩＯ－３的特性，以铂球电极为工作电极，研究了微分脉冲阳极溶出伏安法（ＤＰＡＳ）测定碘离子．由于产物ＩＯ－３在电极上有吸附，因而在＋１３Ｖ电清洗１２０ｓ．在ｐＨ＝４的０１ｍｏｌ／ＬＫＨ２ＰＯ４Ｋ２ＨＰＯ４缓冲溶液底液中，能检测出５００×１０－７ｍｏｌ／Ｌ的Ｉ－，在５００×１０－７１５０×１０－５ｍｏｌ／Ｌ范围内Ｉ－的浓度与峰电流有良好的线性关系．该方法用于海带、食用碘盐中碘的测定，取得了较好的结果 Based on the characteristic of I- being able to be oxidized to form IO-3, the differential pulse anodic stripping voltammetry (DPAS) was used to measure iodide with platinum sphere electrode as the working electrode. Since product IO-3 is adsorbed on the electrode, it is cleaned for 120s at +1.3V. In pH = 4 0  1mol / LKH2PO4  K2HPO4 buffer solution at the bottom, 5  10 × 10-7mol / L of I- can be detected at 5  10 × 10-71  50 × 10-5mol / L I- concentration within the range of peak current has a good linear relationship. The method is applied to the determination of iodine in kelp and iodized salt, and obtains good results