论文部分内容阅读
在非离子型界面活性剂Triton X—100存在下,用5-Br-PADAP测定铜、锌已有报导.本文研究了在非离子型表面活性剂Triton X—100存在下,用5-Br-PADAP分光光度法测定镍.在pH9.2显示出最高且稳定的吸光度,络合物于波长555纳米处其摩尔吸光系数为1.18×10~5升·摩尔~(-1)·厘米~(-1),镍量0～20微克/50毫升范围内符合比尔定律.利用硫代乙醇酸和焦磷酸钠作掩蔽剂,可以消除大量干扰离子的影响,不经分离可以直接测定有色金属及矿石、工业污水等物料中的微量镍.方法简便快速、灵敏度高,选择性好,已用于生产实践中.
In the presence of non-ionic surfactant Triton X-100, the determination of copper and zinc by 5-Br-PADAP has been reported.In this paper, we studied the effect of 5-Br-PADAP in the presence of nonionic surfactant Triton X- PADAP spectrophotometric determination of nickel. At pH 9.2 showed the highest and stable absorbance, the molar absorption coefficient of the complex at a wavelength of 555 nm of 1.18 × 10 ~ 5 liters · mol ~ (-1) · cm ~ (- 1), Beer’s law is obeyed in the range of 0 ~ 20 μg / 50 ml of Ni. Using thioglycolic acid and sodium pyrophosphate as masking agents can eliminate the influence of a large number of interfering ions, and the non-ferrous metals and ores can be directly determined without separation, Industrial wastewater and other materials in the trace nickel method is simple, rapid, high sensitivity, good selectivity, has been used in production practice.