【摘要】 研究了在pH =12 .5的NaOH介质中 ,3价铁与 2价钴分别与EDTA及H2 O2 形成的三元络合物的性质 ,利用双波长分光光度法对微量铁和钴进行了同时测定 .钴和铁测定的线性范围分别是 4～ 3 6μg·mL- 1 和 2～3 8μg·mL- 1 .检测线分别为 3 .5 6μg·mL- 1 和 2 μg·mL- 1 ,本方法用于合成水样中 2离子的测定 ,结果满意更多还原

【Abstract】 A new method was established for determining of micro iron and cobalt by dual-wavelength spectrophotometry, based on the ternary complex formed by iron and cobalt with EDTA and H 2O 2 in solution of pH= 12.5 of NaOH. The liner rangers of cobalt and iron are 4～36 μg· mL -1 and 2～38 μg· mL -1. The detection limits are 3.56×10 -2 μg· mL -1and2×10 -2 μg· mL -1. This method has been applied to the determination of micro iron and coblat in sythetic water sample with satisfaction result.更多还原