RU94026716A - Method of the separated determination of phenol and formaldehyde in water
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Method of the separated determination of phenol and formaldehyde in water
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RU94026716A
RU94026716ARU94026716/04ARU94026716ARU94026716ARU 94026716 ARU94026716 ARU 94026716ARU 94026716/04 ARU94026716/04 ARU 94026716/04ARU 94026716 ARU94026716 ARU 94026716ARU 94026716 ARU94026716 ARU 94026716A
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Priority to RU94026716ApriorityCriticalpatent/RU2075075C1/en
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Publication of RU2075075C1publicationCriticalpatent/RU2075075C1/en
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Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means
(AREA)
Abstract
FIELD: analytical chemistry, organic compounds. SUBSTANCE: phenol is determined by potentiometric titration of extract. Acetylacetone is used as an extract taken at amount 5-20 wt.-% with respect to the analyzed sample, in the presence of sodium sulfate. Formaldehyde is determined in extract in the presence of ammonium acetate by spectrophotometry. Method can be used for phenol and formaldehyde assay in natural and treated sewage. EFFECT: separated assay, increased sensitivity of assay.
Claims (1)
Изобретение относится к аналитической химии органических соединений и может быть использовано для анализа природных и очищенных сточных вод, содержащих фенол и формальдегид. Цель изобретения - раздельное определение фенола и формальдегида, снижение нижнего предела обнаружения. Сущность изобретения заключается в том, что фенол определяется путем потенциометрического титрования экстракта, в качестве экстрагента используется ацетилацетон, в количестве 5 - 20 мас.% по отношению к пробе, в присутствии сульфата натрия, а формальдегид определяется спектрофотометрически в экстракте в присутствии ацетата аммония.The invention relates to the analytical chemistry of organic compounds and can be used to analyze natural and treated wastewater containing phenol and formaldehyde. The purpose of the invention is the separate determination of phenol and formaldehyde, lowering the lower limit of detection. The essence of the invention lies in the fact that phenol is determined by potentiometric titration of the extract, acetylacetone is used as an extractant, in an amount of 5 to 20 wt.% With respect to the sample, in the presence of sodium sulfate, and formaldehyde is determined spectrophotometrically in the extract in the presence of ammonium acetate.
RU94026716A1994-07-151994-07-15Method of separately determining phenol and formaldehyde in aqueous media
RU2075075C1
(en)
Determination of total phenols in waters and wastewaters using flow injection with electrochemical detection; an alternative to the standard colorimetric procedure
Capillary electrophoretic determination of trace metals in hair samples and its comparison with high performance liquid chromatography and atomic absorption spectrometry techniques