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APDC 和MIBK 混合液,经短的分隔后与含有镉的试液混合,经过反应管进行络合萃取反应,再通过一个相分离器,将含有镉的有机相导入原子吸收进行测定.文中对一些反应参数如流动速度,反应管长度,溶液酸度以及与肥料有关的外来离子影响及其消除干扰的方法进行了试验.本法能以每小时24个试样的速度测量,可含有1—50ppb 镉的溶液,其灵敏度与原子吸收直接吸入法相比可增大至23倍.本法用于测定几个肥料样品,回收率为98%左右,相对标准偏差为1.9%.用本法的流程图测定Cu,Fe,Co,Pb,Ni,Ag 和Zn 等七个元素最佳酸度条件及灵敏度的结果有参考价值.
APDC and MIBK mixture, after a short separation with the test solution containing cadmium mixed reaction tube complex extraction reaction, and then through a phase separator, the cadmium containing organic phase is introduced into the atomic absorption was measured.In this paper, some Reaction parameters such as flow rate, reaction tube length, acidity of the solution, and the effect of foreign ions associated with fertilizers and their method of eliminating interference were tested in this method at a rate of 24 samples per hour and may contain 1-50 ppb cadmium Of the solution, the sensitivity and atomic absorption direct inhalation can be increased to 23 times.This method is used to determine several fertilizer samples, the recovery rate of about 98%, the relative standard deviation of 1.9% .This method of determination Cu, Fe, Co, Pb, Ni, Ag and Zn seven elements of the best acid conditions and sensitivity of the results of reference.