摘要
建立了用火焰原子吸收光谱法在同一体系中连续测定铋锭中的铜、银、锌的方法.试样用硝酸溶解,在稀盐酸介质中,分别于原子吸收光谱仪波长324.7,328.1,213.8 nm处,使用空气-乙炔火焰连续测定铜、银、锌的含量.在最佳实验条件下,铜的质量浓度在0.20～0.80 mg/L范围内与吸光度线性关系良好,加标回收率为94.5％～101.8％.银的质量浓度在0.5～2.0 mg/L范围内与吸光度成线性关系,加标回收率为97.3％～102.6％.锌的质量浓度在0.10～0.40mg/L范围内与吸光度成线性关系,加标回收率为96％～106.3％.火焰原子吸收光谱法测定铋锭中的铜、银、锌,相对标准偏差（n=11）均小于8.0％,测定结果与理论值基本一致.
A method for the successive determination of Cu, Ag and Zn in high purity bismuth was developed by flame atomic absorption spectrometry. After the sample was pretreated by dissolving with nitric acid, it was determined by air-acetylene flame absorption spectrometry with Cu 324.7 nm, Ag 328.1 nm and Zn 213.8 nm as analytical lines in the diluted hydrochloric acid medium. Under the optimized experimental conditions, the linear correlations between concentration and absorbance of Cu, Ag and Zn were satisfied with the concentration ranges of 0.20~0. 80 mg/L, 0.5~ 2.0 mg/L and 0.10 ~0.40 mg/L, respectively. The recoveries were 94.5% ~ 101.8% （Cu）, 97.3% ~ 102.6% （Ag）, and 96%~106.3% （Zn）. The relative standard deviations （RSDs, n=11） were all less than 8~ and the results were consistent with reference values.
出处
《中国无机分析化学》
CAS
2015年第1期56-58,共3页
Chinese Journal of Inorganic Analytical Chemistry
关键词
铋锭
火焰原子吸收光谱
痕量
铜
银
锌
bismuth
flame atomic absorption spectrometry
trace
copper
silver
zinc
