| 分光光度法测定油田水样中的硫酸根离子 |
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| 引用本文： | 李源流,李军,张永富,高岭,谢志海.分光光度法测定油田水样中的硫酸根离子[J].应用化工,2008,37(5):579-581. |
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| 作者姓名： | 李源流 李军 张永富 高岭 谢志海 |
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| 作者单位： | 1. 延长油田股份有限公司横山采油厂,陕西横山,719100
2. 西北大学化学系,陕西西安,710069 |
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| 摘 要： | 建立了油田水中SO42-的分光光度测定法。在稀盐酸介质中BaCrO4与SO42-反应生成BaSO4沉淀,并定量置换出CrO42-。溶液经煮沸,并调节至碱性,以沉淀过量的BaCrO4,离心分离后,于420 nm处以试剂空白作参比,测定上清液中CrO42-的吸光度。硫酸根浓度在8.0~120μg/mL范围内符合比耳定律,检出限为4.0μg/mL,相对标准偏差为2.84%(n=8),回收率在97.0%~103%。
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| 关 键 词： | 硫酸根 油田水 分光光度法 |
| 文章编号： | 1671-3206(2008)05-0579-03 |
| 修稿时间： | 2008年3月19日 |
Determination of sulfate in oilfield water by spectrophotometry |
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| LI Yuan-liu,LI Jun,ZHANG Yong-fu,GAO Ling,XIE Zhi-hai.Determination of sulfate in oilfield water by spectrophotometry[J].Applied chemical industry,2008,37(5):579-581. |
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| Authors: | LI Yuan-liu LI Jun ZHANG Yong-fu GAO Ling XIE Zhi-hai |
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| Abstract: | A new spectrophotometry was developed for the determination of sulfate in oilfield water.Sulfate ion in the sample solution was precipitated as BaSO4 by a definite amount of barium chromate.After boiling and adjusting the acidity with ammonia water,the solution mixture was centrifuged.The absorbance of CrO2-4 in the supernatant layer was taken at 420 nm with 1 cm absorption cell.The result showed that the calibration plot was linear in the range of 8.0～120 μg/mL.The detection limit of the method was 4.0 μg/mL.The recovery was between 97.0 %～103% and the relative standard deviation was 2.84%(n=8). |
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| Keywords: | sulfate oilfield water spectrophotometry |
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