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| SDG分离富集-1-(5-溴-2-吡啶偶氮)-2-萘酚-6-磺酸光度法测定环境样品中的微量镍 | |
| 引用本文： | 魏琴,杜斌,黄绍德,邢湘苹.SDG分离富集-1-(5-溴-2-吡啶偶氮)-2-萘酚-6-磺酸光度法测定环境样品中的微量镍[J].农业环境科学学报,1999(2):81-83. |
| 作者姓名： | 魏琴 杜斌 黄绍德 邢湘苹 |
| 作者单位： | 1. 山东建材学院应用化学系,济南,250022 2. 济南化纤总公司 3. 济南市建材研究所 |
| 摘 要： | 研究了镍与５－Ｂｒ－ＰＡＮ－Ｓ的显色条件。在ｐＨ６．０的缓冲液中，形成１：２型的稳定配合物，配合物的最大吸收峰位于５７０ｎｍ波长处，表观摩尔吸光系数ε＝４．６９×１０４Ｌ／（ｍｏｌ．ｃｍ）。镍量在０～３０μｇ／２５ｍＬ范围内符合比尔定律。采用巯基葡聚糖凝胶分离干扰离子富集镍，提高了方法的选择性。 |
| 关 键 词： | 镍(Ⅱ) 巯基葡聚糖凝胶 环境样品 分光光度法 |
Spectrophotometric Determination of Nickel in Environmental Samples with 1-(5-Bromo-2-pyridylazo)-2-naphthol-6-sulphonic Acid by sulfhydryl Dextran Gel for Separation and Enrichment |
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| Wei Qing et al..Spectrophotometric Determination of Nickel in Environmental Samples with 1-(5-Bromo-2-pyridylazo)-2-naphthol-6-sulphonic Acid by sulfhydryl Dextran Gel for Separation and Enrichment[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),1999(2):81-83. | |
| Authors: | Wei Qing |
| Abstract: | The condition of colour reaction of nickel with 1-(5-bromo-2-pyridylazo)-2-naphthol-6-sulphonic acid (5-Br-PAN-S) has been studied. Nickel forms with 5-Br-PAN-S a 1:2 stable complex in pH6.0. The maximum absorbance of the complex is at 570 nm and its apparent colar absorptivity is 4.6910 4 L/molcm. Beer's law is obeyed in the range of 030 g/25mL for nickel. The common metal ions can be separated, and to enrich nickel by sulfhydryl dextran gel, thus, greatly improving the selectivity and sensitivity of the system. |
| Keywords: | 5-Br-PAN-S |
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