Value Of The Index Of Chemical Oxygen Demand As Measure Of The Methanol Content In Return Underground Local-Water Of Oil And Gas Condensate Fields

IF 0.7 Q4 CHEMISTRY, ANALYTICAL
E. A. Reshetnyak, N. N. Nemets, O. Chernyshova, V. M. Ostrovskaya
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引用次数: 0

Abstract

The method of the methanol content control in samples of return underground local-water of oil and gas condensate fields is described. The determination is based on a preliminary estimation of the chemical oxygen demand index, using an accelerated technique with potentiometric redox titration of potassium dichromate excess. On water-methanol solutions of known composition using the “added-found” method, it was proved that under the conditions of the chosen procedure, the methanol is completely oxidized; the value of the relative standard deviation of the determination results does not exceed 3 %. The interfering influence of the components of highly mineralized water samples on the integral assessment of chemical oxygen demand was studied. The accuracy of the determination of methanol in real water samples is proved by the method of standard additives.
化学需氧量指标作为衡量油气凝析田地下回水甲醇含量的价值
介绍了油气凝析油田地下回水样品中甲醇含量的控制方法。测定是基于化学需氧量指数的初步估计,使用加速技术与电位氧化还原滴定过量重铬酸钾。用“添加-发现”法对已知组分的水-甲醇溶液,证明了在所选择的工艺条件下,甲醇被完全氧化;测定结果的相对标准偏差值不超过3%。研究了高矿化度水样组分对化学需氧量综合评价的干扰影响。用标准添加剂法对实际水样中甲醇的测定结果进行了验证。
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来源期刊
CiteScore
1.00
自引率
14.30%
发文量
12
期刊介绍: The journal "Methods and objects of chemical analysis" is peer-review journal and publishes original articles of theoretical and experimental analysis on topical issues and bio-analytical chemistry, chemical and pharmaceutical analysis, as well as chemical metrology. Submitted works shall cover the results of completed studies and shall make scientific contributions to the relevant area of expertise. The journal publishes review articles, research articles and articles related to latest developments of analytical instrumentations.
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