【摘要】 求文研究了在线液一液萃取石墨炉原子吸收分析技术，设计了一种半自动萃取流路系统及其与石墨炉的接口装置．采用一步萃取操作，比较了直接水相测定和萃取测定ＡＵ和Ｃｄ的结果，表明该流路系统性能较好。在萃取测定中，ＡＵ和Ｃｄ的检出限分别为０．０７７和０．０５５ｎｇ／ｍＬ；精密度为Ａｕ４．１％（５．５ｎｇ／ｍＬ）和Ｃｄ４．９％（０．２５ｎｇ／ｍＬ）标准样品分析结果与推荐值吻合，采样频率为２０—３０／ｈ．更多还原

【Abstract】 A liquid liquid flow extraction system associated with a specially designed phase separator has been developed, A common trisection confluence connector was used for segmentation The system was hybrided to a graphite furnace atomic absorption spectrometer by a simple interface.The performance of the system was studied with respect to An and Cd, The detection Iimits were 0. 077ng/mL for An and 0. 0005ng/mL for Cd and the precision were 4. 1 % and 4. 9% respectively. The sample throughput was 20-30/h. Results of real sample analysis were in good agreement with certified values更多还原