分光光度法测定碘酸钾碘盐中的碘
Journal of Taizhou Polytechnical Institute（2006）
Abstract
根据碘酸钾、碘化钾在酸性介质中与结晶紫形成稳定的离子缔合物,用四氯化碳萃取后,以分光光度法测定出食盐中碘酸钾的含量,再换算出碘的含量.实验表明:碘酸钾在0～10μg·ml-1范围内呈良好的线性关系,回归方程为A=0.08210C+0.0046,r=0.9999(n=5),ε=1.77×104L·mol-1·cm-1.本法与食品卫生标准检验方法测得的结果基本一致,方法简便、灵敏、准确,可用于食盐中碘的测定.
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Key words
spectro-photometry,crystal purple,kali-iodidum,salt
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