火焰原子吸收光谱法测定钛白粉中微量铅
FAAS Determination of Trace Amount of Lead in Titanium White
摘 要
钛白粉试样用氢氟酸溶解蒸至近干.驱除氢氟酸后用硝酸(1+1)溶解盐类,稀释至一定体积后用空气-乙炔火焰原子吸收光谱法测定其中痕量铅.用氘灯扣背景,消除基体背景吸收干扰,于217.0 nm波长处测定铅,检出限(3σ)为0.03 mg·L-1.在4个不同浓度水平上做回收试验,所得回收率为95.5%~107.5%.对一已知含量(15.0 μg·g-1)的试样,测定8次,求得其相对标准偏差为3.56%.
钛白粉
微量铅
FAAS
Titanium white
Lead
Abstract
Sample of titanium white was dissolved in HF,and after evaporation to near dryness,the salts were taken up with HNO3(1+1) and diluted to a definite volume.Trace amount of lead in the sample solution was determined by FAAS with air-C2H2 flame and at the wavelength of 217.0 nm.Deuterium lamp background correction was applied to eliminate the interference of matrix-background absorption.Detection limit (3σ) found for the method was 0.03 mg·L-1.Recovery test was made at 4 different concentration levels,giving values of recovery in the range of 95.5%-107.5%.Test for precision was made with a sample containing 15.0 μg·g-1 of lead for 8 determinations,value of RSD found was 3.56%.
中图分类号 O657.31
所属栏目 工作简报
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收稿日期 2008/8/16
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备注王伟(1976-),男,安徽桐城人,工程师,主要从事出口化矿金产品检测分析工作.
引用该论文: WANG Wei,PAN Chun-xiu,WANG Xiao-zhao. FAAS Determination of Trace Amount of Lead in Titanium White[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2009, 45(9): 1075～1076
王伟,潘春秀,王小召. 火焰原子吸收光谱法测定钛白粉中微量铅[J]. 理化检验－化学分册, 2009, 45(9): 1075～1076
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参考文献
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