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有关镉、钴、镍的分析,沿用的分析方法及在三者共同存在下的分离分析方案已有多种,虽能满足其常量及微量分析要求,但就其灵敏度和准确度而言,都存在着一定的局限性。文中介绍一些高灵敏性的试剂及简便有效的分析方案以及原理、应用予以扼要述评。一铜的分析 1 吡啶-2-乙醛脒腙-Cu(Ⅱ)络合物的吸光光度和极谱研究文献曾介绍过吡啶-2-乙醛脒腙(PAG)的性质及其与一些阳离子的反应,而将其用作铜(Ⅱ)的灵敏试剂是Roman的首创。 (a) PAG—Cu(Ⅱ)的吸光光度测定法制备含9.75～13.9μg铜,加入试剂溶液(0.2%)5毫升,缓冲溶液(pH 8.1一三羟基肟胺基甲烷/HCl)
For cadmium, cobalt, nickel analysis, analysis methods used and in the three co-exist in the separation analysis program has a variety of, although it can meet the requirements of its constant and micro-analysis, but its sensitivity and accuracy are There are some limitations. The article describes some highly sensitive reagents and simple and effective analysis of the program and the principle of application to be briefly commented. A copper analysis 1 pyridine-2-acetal guanylhydrazone-Cu (Ⅱ) complex absorbance and polarographic studies have described the pyridine-2-acetaldehyde guanylhydrazone (PAG) and its properties and some of the cations Of the reaction, and its use as a sensitive reagent copper (Ⅱ) is Roman’s first. (a) The absorbance of PAG-Cu (II) was measured by using a spectrophotometer with a concentration of 9.75 ~ 13.9μg copper, adding 5ml reagent solution (0.2%