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West等人用硅管在空气-乙炔焰中捕集银2分钟,测得银的特征浓度为9×10~(-4)ppm,比常规火焰原子吸收法的灵敏度提高40倍。孙汉文用不锈钢管在空气-乙炔焰中捕集0.005ppm银10分钟,测得银的特征浓度为4×10~(-4)ppm。根据原子捕集和释放机理,本文改进了实验装置和方法,即采用贫焰捕集,脉冲富焰释放的方法,在石英捕集管上捕集0.001ppm银溶液8分钟,测得银的特征浓度为5.5×10~(-5)ppm,比常规方法的灵敏度提高1090倍。初步测定了电镀液中银含量。
West et al. Used silicon tubes to capture silver in an air-acetylene flame for 2 minutes and found that the characteristic concentration of silver was 9 × 10 -4 ppm, which was 40 times more sensitive than conventional flame atomic absorption spectrometry. Sun Hanwen stainless steel tube in the air - acetylene flame trapped 0.005ppm silver 10 minutes, the measured silver characteristic concentration of 4 × 10 ~ (-4) ppm. According to the mechanism of atomic capture and release, the experimental device and method are improved in this paper. The method of lean trapping and pulsed flame enrichment is used to capture 0.001ppm silver solution on a quartz trap for 8 minutes to measure the characteristics of silver The concentration of 5.5 × 10 ~ (-5) ppm, than the conventional method to improve the sensitivity of 1090 times. The initial determination of the silver content in the plating solution.