在火焰原子吸收分光光度计火焰上方放置一只特制的不锈钢管作为原子化器,将不锈钢样品溶液定量滴加在不锈钢原子化管内,在乙炔-一氧化二氮高温火焰下对不锈钢样品中微量砷的含量进行无火焰原子化测定,以标准加入法进行定量分析.方法的特征质量为59 pg/1%,绝对检出限(3σ)为3.6 pg.

A specially made stainless steel tube,used as atomizer instead of the graphite furnace,was installed at the top of the N2O-C2H2 flame of the atomic absorption spectrometer.Sample solution of stainless steel was introduced into the stainless steel tube,and microamounts of arsenic in the sample were determined by AAS with non-flame atomization in high-temperature flame of N2O-C2H2.The standard addition method was used in the determination.Characteristic mass and absolute detection limit (3σ) of the method were found to be 59 pg/1% and 3.6 pg respectively.