| 离子交换分离偶氮氯膦Ⅲ钡光度法快速测定地表水中的硫酸根 |
| 摘要点击 1316 全文点击 1450 投稿时间：1988-10-04 |
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| 中文摘要 |
| 本文报告一个测定硫酸根的快速光度法,方法基于在酸性乙醇介质中SO42-与CPAⅢ-Ba2+的反应,在15毫升显色液中,SO42-浓度介于20-120徽克遵守比尔定律,表观摩尔吸光系数ε′=6.3×103升·摩尔-1·厘米-1,显色体系至少能稳定24小时,阳离子的干扰用强酸型阳离子交换树脂分离,水样测定的相对标准偏差为1.85-3.10%。 |
| 英文摘要 |
| A rapid spectrophotometric method for determination of SO42- in surface water is reported. It is based on the reaction of CPA Ⅲ-Ba2+ complex with SO42- in acidic medium in the presence of ethanol. Beer's law is obeyed up to 120μg of SO42- in final solution. The molar absorptivity is 6.3×103 liters· mol-1 ·cm-1 at 500 nm, and the coefficient of variation varies from 1.85 to 3.10%. The absorbance remains stable for at least 24h and the interfering ions in separated by strongly acidic cation-exchange resin. |
