METHOD OF DETERMINING CITRIC ACID AND CITRATES IN PROCESS FLUIDS CONTAMINATED WITH OIL PRODUCTS
	POLIAKOVA N V; ZADOROZHNYI P A; SUKHOVERKHOV S V
	2024-01-29
专利权人	FEDERAL STATE BUDGETARY INST (FSBI-C)
申请日期	2024-01-29
专利号	RU2829218-C1
成果简介	NOVELTY - Invention relates to a method for evaluating composition of process fluids. Method of determining concentration of citric acid and citrates in technical liquids based on ethylene glycol, contaminated with oil products, is characterized by that 100 ml of a sample of technical solution is separated, 20 ml is separated and several drops of concentrated hydrochloric acid, which do not contain iron ions, are added to pH = 2 and the concentration of iron ions is determined, then 80 ml of an unpreserved sample is placed in a separating funnel, extracted 3 times with 15 ml of hexane, lower layer is separated, 2 ml is collected and placed in a reaction flask, 2 ml of distilled water, 0.5 ml of 30 vol.% H2SO4, 0.5 ml of solution of 30 wt.% KBr and 1 ml of solution of 2.5 wt.% KMnO4 are successively added, obtained mixture is shaken for 30 seconds and left for 5 minutes for oxidative bromination reaction, at the end of reaction 1 ml of a reducing agent is added to the mixture – solution of 5 wt.% ascorbic acid, turbidity of the obtained solution is determined on a spectrophotometer, at wavelength of 550 nm against a blank solution, a calibration curve is plotted in the concentration range from 0 to 5 g/l of citric acid in solution of 50 vol.% ethylene glycol with addition of iron ions in the concentration obtained at the first stage, and concentration of citric acid and citrates in the sample is determined. USE - Measuring; chemistry. ADVANTAGE - Invention enables to take into account the content of iron in the analysed solution, as well as determine the concentration of citric acid and citrates in the analysed sample. 1 cl
IPC 分类号	G01N-033/00 ; G01N-033/84
国家	俄罗斯
专业领域	生物科学
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/18318
专题	中国科学院新疆生态与地理研究所
作者单位	FEDERAL STATE BUDGETARY INST (FSBI-C)
推荐引用方式 GB/T 7714	POLIAKOVA N V,ZADOROZHNYI P A,SUKHOVERKHOV S V. METHOD OF DETERMINING CITRIC ACID AND CITRATES IN PROCESS FLUIDS CONTAMINATED WITH OIL PRODUCTS. RU2829218-C1[P]. 2024.

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