摘要
采用干灰法消化L-色氨酸样品，建立了测定L-色氨酸中重金属（以铅计）含量的石墨炉原子吸收光谱法。对测定L-色氨酸的仪器工作条件进行了探讨。铅的浓度在0-32μg／L内与吸光度成良好的线性关系，线性回归方程为A=0.023170c＋0.003600，相关系数r=0．9998，测定结果的相对标准偏差为1．1％（n=5），回收率为97．7％-100．6％。
L-tryptophane samples were digested with ashing method, the method for the determination of lead in L-tryptophane by graphite furnace atomic absorption spectrometry was developed. The determination conditions were studied. The concertration of lead was linear with absorbance in the range of 0-32μg/L, the linear regression equation was A =0. 023 17c ＋0. 003600, the correlation coefficient was 0. 999 8, the RSD was 1.1%, and the recoveries were 97.7%-100.6%.
出处
《化学分析计量》
CAS
2006年第2期33-34,共2页
Chemical Analysis And Meterage
关键词
L-色氨酸
石墨炉原子吸收光谱法
测定
铅
L-tryptophane, graphite furnace atomic absorption spectrometry, determination, lead
