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Название: Determination of water-soluble forms of oxalic and formic acids in soils by ion chromatography
Авторы: Karicheva, Ekaterina Yurievna
Guseva, Natalia Vladimirovna
Kambalina, Mariya Gennadievna
Ключевые слова: щавелевая кислота; муравьиная кислота; почвы; ионная хроматография; карбоновые кислоты; химический состав; водные растворы; градиенты
Дата публикации: 2016
Издатель: IOP Publishing
Библиографическое описание: Karicheva E. Yu. Determination of water-soluble forms of oxalic and formic acids in soils by ion chromatography / E. Yu. Karicheva, N. V. Guseva, M. G. Kambalina // IOP Conference Series: Earth and Environmental Science. — 2016. — Vol. 33 : Contemporary Issues of Hydrogeology, Engineering Geology and Hydrogeoecology in Eurasia : All-Russian Scientific Conference with International Participation on Contemporary Issues, 23–27 November 2015, Tomsk, Russia. — [012006, 5 p.].
Аннотация: Carboxylic acids (CA) play an important role in the chemical composition origin of soils and migration of elements. The content of these acids and their salts is one of the important characteristics for agrochemical, ecological, ameliorative and hygienic assessment of soils. The aim of the article is to determine water-soluble forms of same carboxylic acids - (oxalic and formic acids) in soils by ion chromatography with gradient elution. For the separation and determination of water-soluble carboxylic acids we used reagent-free gradient elution ion-exchange chromatography ICS-2000 (Dionex, USA), the model solutions of oxalate and formate ions, and leachates from soils of the Kola Peninsula. The optimal gradient program was established for separation and detection of oxalate and formate ions in water solutions by ion chromatography. A stability indicating method was developed for the simultaneous determination of water-soluble organic acids in soils. The method has shown high detection limits such as 0.03 mg/L for oxalate ion and 0.02 mg/L for formate ion. High signal reproducibility was achieved in wide range of intensities which correspond to the following ion concentrations: from 0.04 mg/g to 10 mg/L (formate), from 0.1 mg/g to 25 mg/L (oxalate). The concentration of formate and oxalate ions in soil samples is from 0.04 to 0.9 mg/L and 0.45 to 17 mg/L respectively.
URI: http://earchive.tpu.ru/handle/11683/34016
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