【摘要】 应用NCP-Cu（Ⅱ）-I^-反应体系,采用火焰原子吸收测定与碘定量反应的铜,从而间接测定碘。对反应体系的显色剂和还原剂用量、pH、稳定时间做了选择试验。方法相对标准偏差<3％,回收率93％～110％。线性范围0～5.0μg·ml^-1,用于生物试样（海带、紫菜）和药品（西地碘片）中碘的测定,结果满意。更多还原

【Abstract】 In a buffered solution of pH 4.5,iodide is made to react with NCP-Cu（ I ） complex in the presence of thiourea as reducing agent. A ternary complex NCP-Cu（ I ）-I^- is thus formed and is extracted in to chlorobenzene. The amount of Cu（ I ） in the complex is determined by FAAS and is calculated to iodide content. The optimum conditions （e. g. pH,organic extractam. suitable amounts of various reagents added,etc）were critically studied and selected. Betr’ s law is obeyed in the concentration range of 0⁵. Oμg ·nil^-1. The recovery of iodide is 93 %¹10% and the relative standard deviation is 3%. The proposed method has been applied to the determination of iodide in some biological samples and medicines with satisfactory results.更多还原