摘要
文章通过与国家标准《制盐工业通用试验方法碘的测定》中直接滴定法的比较试验,研究了酒石酸在直接滴定法测定食用盐中碘酸钾含量中的应用。发现酒石酸溶液可以替代磷酸溶液。用酒石酸代替磷酸可以减少分析工作废液中磷的排放,减少环境污染。酒石酸可以通过微生物代谢分解,符合绿色化学的要求。数据分析显示,采用F检验(单边)、统计推断置信度P=95%,酒石酸溶液的检测方法与采用磷酸溶液的方法在测定结果的精密度间无显著性差异;采用t检验,置信度P=95%,酒石酸溶液的检测方法在统计上不存在系统误差,方法可靠。文章还给出了采用酒石酸方法滴定一种粉碎洗涤盐样品中碘酸钾含量的标准添加回收率为99.6%。
In this article,the application of tartaric acid in the determination of potassium iodate in edible salt by direct titration was studied by comparing with the direct titration method in the national standard " General test method in salt industry-Determination of iodine ".It is found that tartaric acid solution can replace phosphoric acid solution.The use of tartaric acid instead of phosphoric acid can reduce the discharge of phosphorus in the analysis waste liquid and reduce environmental pollution.Tartaric acid can be metabolized by microorganisms,which meets the requirements of green chemistry.Data analysis showed that there was no significant difference in precision between tartaric acid solution method and phosphoric acid solution method using F test(unilateral) and statistical inference confidence(P=95%);Using t test,the confidence P=95%,the detection method of tartaric acid solution has no statistical systematic error,and the method is reliable.The standard addition rate of potassium iodate in a smashed washing salt by tartaric acid titration is 99.6%.
作者
周洋
ZHOU Yang(Engineering Technology Institute Co.Ltd of CNSIG,Tianjin 300450,China)
出处
《盐科学与化工》
2021年第11期23-25,共3页
Journal of Salt Science and Chemical Industry
关键词
直接滴定法
碘酸钾
磷酸
酒石酸
食用盐
Direct titration
Potassium iodate
Phosphoric acid
Tartaric acid
Edible salt
