摘要
目的建立一种测定食盐中硫酸根含量的分光光度方法。方法样品溶液中加入过量铬酸钡悬浊液处理后,滤液中含有被硫酸盐所取代的铬酸盐离子,呈现黄色,进行比色定量。结果方法的相对标准偏差为0.37%~2.34%(n=7),精密度高;回收率在98.9%~101.8%之间,准确度好。结论该方法精密度高、准确度好、操作简便,适合食盐中硫酸根含量的批量检测。
Objective To develop a spectrophotometric method for the determination of sulfate in salt.Methods After excessive of barium chromate suspension was added to the sample solution,the filtrate contained chromate ions replaced by sulfate and appeared yellow,which could be quantified colorimetrically.Results The method had high precision with the RSD of 0.37%-2.34%(n=7).And the recoveries was between 98.9%and 101.8%with good accuracy.Conclusion The method is suitable for the batch determination of sulfate content in salt with high precision,good accuracy and easy operation.
作者
高牡丹
李静
李新玲
杨振东
GAO Mudan;LI Jing;LI Xinling;YANG Zhendong(Shandong Research Center of Engineering and Technology for Quality Control of Food for Special Medical,Shandong Research Center of Engineering and Technology for Safety Inspection of Food and Drug,Shandong Institute for Food and Drug Control,Shandong Ji’nan 250100,China)
出处
《中国食品卫生杂志》
CSCD
北大核心
2023年第1期86-90,共5页
Chinese Journal of Food Hygiene
关键词
硫酸根
食盐
分光光度
铬酸钡
Sulfate
salt
spectrophotometry
barium chromate
