摘要
丁基黄原酸是饮用水的测定指标,通常采用铜试剂亚铜分光光度法测定,测定时灵敏度低、重现性差,是水质监测难点之一。文章对测定时影响较大的因素和未明确的技术点进行了优化,推荐调整盐酸羟胺投加量为2.00 g、振摇萃取时间5 min,确定DDTC投加量0.1-0.2 g、显色反应时间10 min。优化后方法检出限0.50μg,低于国标方法的检出限1μg,方法灵敏度明显提升,解决了操作中的一些技术问题,以便更好地应用。
Butyl xanthic acid is one of monitoring index of drinking water, which is usually detected by the method of sodium diethyldithiocarbamate cuprous spectrophotometry. The method is less sensitive and poor reproducibility, which is one of the difficulties in water quality monitoring. In this paper, the factors that have great influence and the undetermined technology points are optimized, it recommended adjust the hydroxylamine hydrochloride dosage to 2.00 g, add the vibration shaking extraction time to 5 min, determine the DDTC amount of 0.1-0.2 g and coloration time of 10 min. After optimization, the detection limit is 0.50 μg, lower than the national standard method of detection limit of 1 μg. The sensitivity of the method is obviously improved, and some technical problems in operation are solved so as to apply the method.
作者
罗劼
朱源
陈云
Luo Jie Zhu Yuan Chen Yun(Department of Food Engineering, Wuchang Institute of Technology, Wuhan 430065, China Suzhou Centre Testing International Co., Ltd., Suzhou 215100, China Wuhan Institute of Technology, Wuhan 430205, China)
出处
《江苏科技信息》
2016年第27期38-40,43,共4页
Jiangsu Science and Technology Information
关键词
丁基黄原酸
铜试剂亚铜
分光光度法
butyl xanthate
cuprous copper reagent
spectrophotometric method
