用3,5-diBr-PADAT-H_(2)O_(2)分光光度测定微量铜

Extraction-Spectrophotometric Determination of Micro amounts of Copper using 3,5-bi-Br-PADAT-H_(2)O_(2)

本文试验了3.5-diBr-PADAT有HO存在下和铜离子显色时,温度酸度及阴离子的影响情况。试验结果认为,显色反应适宜的pH值在3.2—3.8。络合物的组成比为1∶1,克分子吸光系数为8.6×10^(4)。又对其它条件作了些试验,用2—噻吩甲酰基代三氟丙酮(HTTA)—苯萃取铜,能使干扰元素分离,用于微量矿物和土壤中微量铜的测定,与其它方法比较结果满意。

Conditions have been studied for the formaton and extraction of a complex of copper with 3,5-diBr-PADAT in the presence of peroxide at pH 3.8,ε_(570)=8.6×10.HTTA-bnzene extract the complex by 98-102%.Calibration curve for copper was linear withina a range 0.5~10μg/25ml.