[go: up one dir, main page]

RU94034404A - Method of determining p-cresol in aqueous solutions - Google Patents

Method of determining p-cresol in aqueous solutions

Info

Publication number
RU94034404A
RU94034404A RU94034404/04A RU94034404A RU94034404A RU 94034404 A RU94034404 A RU 94034404A RU 94034404/04 A RU94034404/04 A RU 94034404/04A RU 94034404 A RU94034404 A RU 94034404A RU 94034404 A RU94034404 A RU 94034404A
Authority
RU
Russia
Prior art keywords
cresol
determination
extraction
aqueous solutions
determining
Prior art date
Application number
RU94034404/04A
Other languages
Russian (ru)
Inventor
Я.И. Коренман
Т.Н. Ермолаева
Е.А. Подолина
Original Assignee
Воронежский технологический институт
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Воронежский технологический институт filed Critical Воронежский технологический институт
Priority to RU94034404/04A priority Critical patent/RU94034404A/en
Publication of RU94034404A publication Critical patent/RU94034404A/en

Links

Landscapes

  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

FIELD: analytical chemistry of organic compounds. SUBSTANCE: method consists in extracting p-cresol from analyzed sample by hydrophylic solvent, in particular 4-butyrolacton, in presence of salting out agent, in particular 35.5-43.5 wt % ammonium sulfate, and subsequent determination of p-cresol in the extract using potentiometric titration technique. EFFECT: increased by one third completeness of p-cresol extraction at hundredfold concentration, increased accuracy and selectivity of the analysis, and simplified process due to elimination of re-extraction step.

Claims (1)

Изобретение относится к аналитической химии органических соединений и может быть использовано для контроля за содержанием п-крезола в водных растворах. Цель изобретения - увеличение на 30% полноты извлечения п-крезола при 100 - кратном концентрировании, повышение точности и селективности определения п-крезола, упрощение определения за счет исключения стадии реэкстракции. Сущность изобретения заключается в том, что определение п-крезола в водных растворах осуществляется путем экстракции из анализируемой пробы гидрофильным растворителем в присутствии высаливателя и последующим определением п-крезола. В качестве экстрагента используется 4-бутиролактон (5 - 25 мл), а в качестве высаливателя сульфат аммония 35,5 - 43,0 мас.%. Определение п-крезола проводят методом потенциометрического титрования экстракта.The invention relates to analytical chemistry of organic compounds and can be used to control the content of p-cresol in aqueous solutions. The purpose of the invention is to increase by 30% the completeness of extraction of p-cresol at 100-fold concentration, increase the accuracy and selectivity of the determination of p-cresol, simplify the determination by eliminating the stage of re-extraction. The essence of the invention lies in the fact that the determination of p-cresol in aqueous solutions is carried out by extraction from the analyzed sample with a hydrophilic solvent in the presence of a salting out agent and the subsequent determination of p-cresol. 4-butyrolactone (5 - 25 ml) is used as an extractant, and ammonium sulfate 35.5 - 43.0 wt.% As a salting out agent. The determination of p-cresol is carried out by potentiometric titration of the extract.
RU94034404/04A 1994-09-19 1994-09-19 Method of determining p-cresol in aqueous solutions RU94034404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94034404/04A RU94034404A (en) 1994-09-19 1994-09-19 Method of determining p-cresol in aqueous solutions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94034404/04A RU94034404A (en) 1994-09-19 1994-09-19 Method of determining p-cresol in aqueous solutions

Publications (1)

Publication Number Publication Date
RU94034404A true RU94034404A (en) 1996-08-20

Family

ID=48449123

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94034404/04A RU94034404A (en) 1994-09-19 1994-09-19 Method of determining p-cresol in aqueous solutions

Country Status (1)

Country Link
RU (1) RU94034404A (en)

Similar Documents

Publication Publication Date Title
US6323036B1 (en) Reagents and methods for releasing and measuring lead ions from biological matrices
RU94034404A (en) Method of determining p-cresol in aqueous solutions
RU2034295C1 (en) Method for determination of residual amount of pesticides in milk and meat
RU2127878C1 (en) Method of separately determining tannin and catechins (on conversion to gallic acid) in tea
SU817583A1 (en) Method of determining residual quantities trephlane in soil
RU94022114A (en) Method of determination of propylene glycol dinitrate in soil
SU1397786A1 (en) Method of quantitative determination of 5-ethyl-5-isoamylbarbiturate of sodium
RU93052258A (en) METHOD FOR SEPARATE DETERMINATION OF PHENOL AND SPATIALLY DIFFICULT PHENOLS IN AQUEOUS SOLUTIONS
RU1817848C (en) Method of heavy metal technogenic pollution detecting at bottom settling
SU637665A1 (en) Rock sample analysis method
SU703762A1 (en) Method of quantitative determining of formaldenyde in solutions
SU821408A1 (en) Method of extractional fluorimetric determination of gallium
RU94026716A (en) Method of the separated determination of phenol and formaldehyde in water
RU2003970C1 (en) Method of arsenic determination in biomaterial
RU94032094A (en) Method of determination of concentration of phenol and its fluorescent derivatives in aqueous media
SU990673A1 (en) Method for spectrophotometrically detecting mercury
RU2009484C1 (en) Method for cobalt detecting in biological substance
Jankovskienë et al. Speciation of free and total sulphite in wines by capillary electrophoresis
SU720354A1 (en) Method of quantitatively detecting n-isopropylaminodiphenylamine
RU2201780C2 (en) METHOD OF SEPARATELY DETERMINING α-, β-LEWISITES, THEIR OXIDES, AND CHLOROVINYLARSONIC ACIDS WHEN PRESENT IN COMMON IN SOIL
RU2021596C1 (en) Method of mercury (ii) extraction from aqueous solution for analysis
SU975579A1 (en) Method for detecting chromium
SU1275284A1 (en) Method of identifying nickel in aqueous media
RU94022215A (en) Method of extractive-amperometric determination of pyrocatechol in aqueous solutions containing resorcinol and guaiacol
Čakrt et al. Spectrofluorimetric and isotachophoretic determination of maprotiline in human blood serum