有色冶金设计与研究
有色冶金設計與研究
유색야금설계여연구
Nonferrous Metals Engineering & Research
2015年
5期
31-33
,共3页
硅%锌及锌合金%基体匹配%分光光度法%校准工作曲线
硅%鋅及鋅閤金%基體匹配%分光光度法%校準工作麯線
규%자급자합금%기체필배%분광광도법%교준공작곡선
silicon%zinc and zinc alloy%matrix matching%spectrophotometric method%calibration of work curve
对国标中用于测定锌及锌合金中硅含量的钼蓝光度法进行了分析,研究了其中的不足,并作出了几点补充和建议.新方法采用基体匹配方式校正标准曲线及空白,消除基体干扰;使用变色范围pH5.6~7.6的对硝基苯酚调pH.实验表明:在硫酸介质中,硅与钼酸铵生成硅钼杂多酸,用抗坏血酸作还原剂,硅标准溶液浓度在0~1.0 μg/mL范围内符合比尔定律,标准回收率为98%~101%,较国标方法更理想,拓宽了硅量测定范围.
對國標中用于測定鋅及鋅閤金中硅含量的鉬藍光度法進行瞭分析,研究瞭其中的不足,併作齣瞭幾點補充和建議.新方法採用基體匹配方式校正標準麯線及空白,消除基體榦擾;使用變色範圍pH5.6~7.6的對硝基苯酚調pH.實驗錶明:在硫痠介質中,硅與鉬痠銨生成硅鉬雜多痠,用抗壞血痠作還原劑,硅標準溶液濃度在0~1.0 μg/mL範圍內符閤比爾定律,標準迴收率為98%~101%,較國標方法更理想,拓寬瞭硅量測定範圍.
대국표중용우측정자급자합금중규함량적목람광도법진행료분석,연구료기중적불족,병작출료궤점보충화건의.신방법채용기체필배방식교정표준곡선급공백,소제기체간우;사용변색범위pH5.6~7.6적대초기분분조pH.실험표명:재류산개질중,규여목산안생성규목잡다산,용항배혈산작환원제,규표준용액농도재0~1.0 μg/mL범위내부합비이정률,표준회수솔위98%~101%,교국표방법경이상,탁관료규량측정범위.
The paper analyzes molybdenum blue spectrophotometric method that is used to measure silicon content in zinc and zinc alloy, meanwhile, researches some shortcomings and gives some supplements and advices. The new method uses matrix matching to correct standard curve and the blank by eliminating the matrix interference. Color range pH5.6 ~ 7.6 is used on nitrophenol to adjust pH. Experiments show that silicon and ammonium molybdate react to generate silicon molybdenum heteropoly acid in sulfuric acid medium by using ascorbic acid as reducing agent. The concentration of silicon standard solution within 0 ~ 1.0 μg/mL conforms to beer's law, standard recovery is 98% ~ 101%, which is better than the national standard method and broaden the scope of determination of silicon content.
