论文部分内容阅读
上海灯泡厂检验科何艺工程师研究结果表明:苯重氮氨基偶氮苯是测定镍的最灵敏的显色剂之一。在硼砂缓冲溶液中Triton X-100存在时,镍与题述试剂形成红色配合物,此配合物在24小时内吸光度基本不变,最大吸收波长为535～540nm,镍在0—8μg/ml范围内服从比耳定律,用平衡移动法测得镍与本试剂的配合物之比为镍:试剂=1∶3。摩尔吸光系数为1.95×10~5L·mol~(-1)·cm~(-1)。本法已用于金属钨中痕量镍的测定,分析结
Shanghai Bulb Factory Inspection Division Ho Arts engineers showed that: benzene diazo amino azobenzene is one of the most sensitive reagent for the determination of nickel. In the presence of Triton X-100 in borax buffer solution, nickel forms a red complex with the title reagent. The absorbance of this complex is almost unchanged within 24 hours. The maximum absorption wavelength is 535-540 nm. Nickel is in the range of 0-8 μg / ml Oral obey Beer’s law, measured by the equilibrium shift method of nickel and the reagent complex ratio of nickel: reagent = 1: 3. The molar extinction coefficient is 1.95 × 10 ~ 5L · mol ~ (-1) · cm ~ (-1). This method has been used for the determination of trace nickel in tungsten metal, analysis of knot