摘要
在硫酸介质中,碘酸钾与桑葚红反应褪色程度与碘酸根量在一定范围内呈线性关系,从而建立了碘的光度测定新方法。结果表明,方法的最大吸收波长在520nm处,碘定量测定的线性范围为0～50mg/25mL,摩尔吸光系数ε=4.3×104 L/mol.cm。研究可直接测定食盐中的碘,结果满意。
A new method has been developed for the determination of trace amount of iodate by Mul- berry red, The complex has a maximum absorption wavelength at 520 nml The liner range is 0 50 mg/25 mL for iodine ε=4.3× 104 L/tool · cm The method has been used for the determination of iodate in table salt with satisfactory results.
出处
《中国调味品》
CAS
北大核心
2012年第10期86-87,共2页
China Condiment
关键词
桑葚红
褪色光度法
食盐
碘
Mulberry red oxidation-decoloration spectrophotometry salt Iodine
