硅钼黄和硅钼蓝测定水中偏硅酸方法比较
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摘要
利用硅钼黄和硅钼蓝两种方法对水中偏硅酸的进行检测,两种方法在所测范围内线性良好,硅钼黄光谱法定量限为1mg·L~(-1),加标回收率在95.0%～103%,精密度为1.0%～3.8%;硅钼蓝法为定量限0.1 mg·L~(-1),加标回收率在95.0%～103%,精密度为1.0%～1.9%,两种分析方法结果差异不显著。结果表明,两种方法均满足日常检验要求,检验员可以根据自身情况进行选择。
Molybdenum yellowand molybdenum blue two methods are used to test the water of metasilicate,which show good linear relationship in their measuring scope. The molybdenum yellow spectroscopy quantitative limit is 1 mg·L~(-1), the recovery of standard addition is 95.0%～103% with precision of 1.0%～3.8%, while the molybdenum blue spectroscopy the quantitative limit is 0.1 mg·L~(-1), the recovery of standard addition is 95.0%～103% with precision of 1.0%～1.9%. There are no significant difference between two methods of analysis inthe results. The results show that both methods meet the requirements of daily inspection and inspectors can choose one according to their condition.
Molybdenum yellowand molybdenum blue two methods are used to test the water of metasilicate,which show good linear relationship in their measuring scope. The molybdenum yellow spectroscopy quantitative limit is 1 mg·L~(-1), the recovery of standard addition is 95.0%～103% with precision of 1.0%～3.8%, while the molybdenum blue spectroscopy the quantitative limit is 0.1 mg·L~(-1), the recovery of standard addition is 95.0%～103% with precision of 1.0%～1.9%. There are no significant difference between two methods of analysis inthe results. The results show that both methods meet the requirements of daily inspection and inspectors can choose one according to their condition.
引文
[1]国家卫生和计划生育委员会,国家食品药品监督管理总局.GB 8538-2016食品安全国家标准饮用天然矿泉水检验方法[S].北京:中国标准出版社,2017.
[2]崔真真,庄红,朱媛媛,等.矿泉水中偏硅酸含量检测方法研究[J].食品安全与检测,2010,35(6):293-296.
[3]陈爽,徐接胜.关于检出限的定义、分类及估算方法的探讨[J].广州化工,2014(18):137-139.
[2]崔真真,庄红,朱媛媛,等.矿泉水中偏硅酸含量检测方法研究[J].食品安全与检测,2010,35(6):293-296.
[3]陈爽,徐接胜.关于检出限的定义、分类及估算方法的探讨[J].广州化工,2014(18):137-139.