摘要
在非离子（O／W）型微乳液（0P／正戊醇／正庚烷／H2O）介质中，建立了罗丹明B-硅钼杂多酸显色体系测定钢中硅的方法。在优化的实验条件下，罗丹明B与硅钼杂多酸形成的络合物最大吸收波长为590nm，线性回归方程为y=0．278lx-0．0124，硅含量在0．006～0．07μg／mL范围内符合比尔定律，方法的检出限为2×10^-6g／L，表观摩尔吸光系数为ε=3．89×10^5L·mol^-1·cm^-1，磷、砷的干扰可加入酒石酸消除。方法用于钢样中硅的测定，测定结果与认定值吻合，相对标准偏差在1．6％～2．1％之间。
A method for determination of silicon in steel samples by colour reaction of rhodamine B- hetersilicomolybdic acid in O/W nonionic microemulsion medium （OP/-nC5 Hll OH/n-C7 H16/H2O） was established . In the optimal experimental conditions , the maximum absorption wavelength of the complex formed by rhodamine B and hetersilicomolybdic acid is at 590 nm. Linear regression equation is y = 0. 278 lx--0. 012 4. Beer＇s law is obeyed in 0. 006--0. 07μg/mL for silicon. The detection limit is 2×10^-6 g/L and the apparent molar absorptivity is 3.89×l0^5 L·mol^-1·cm^-1. The interferences from P（V） and As（V） were removed by adding tartaric acid. The method has been applied in the determination of silicon in steels with RSD of 1.6%-- 2.1 %, and the results were consistent with certified values .
出处
《冶金分析》
CAS
CSCD
北大核心
2008年第3期53-55,共3页
Metallurgical Analysis
关键词
微乳液
硅
罗丹明B
钼酸铵
分光光度法
microemulsion
silicon
rhodamine B
ammonium molybdate
spectrophotometry
