Influence of filtration, preservation and storing on the analysis of low molecular weight organic acids in natural waters

Karlsson, Stefan; Wolrath, Helen; Dahlén, Johan

doi:10.1016/s0043-1354(98)00485-0

Cited by 22 publications

(15 citation statements)

References 21 publications

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“…And 144 samples in Guiyang and 47 samples in Shangzhong were collected on an event basis from April 2006 to April 2007. The rainwater samples and the blank sample with deionized water were frozen to −18°C until analysis (Karlsson et al 1999;Fornaro and Gutzb 2003). Blank tests and stability tests performed for these samples show no detectable peaks.…”

Section: Sample Collection and Analysismentioning

confidence: 99%

Urban and rural observations of carboxylic acids in rainwater in Southwest of China: the impact of urbanization

Xu¹,

Lee

2009

J Atmos Chem

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Seven carboxylic acids in rainwater were simultaneously determined using ion chromatography for 13 months in two different sites, Guiyang and Shangzhong, southwest of China. Results showed formic, acetic and oxalic acids were the three predominant carboxylic acids. Their volume-weighted average concentrations were 14.24, 9.35, 2.79 μmol/L in Guiyang and 4.95, 1.35, 2.31 μmol/L in Shangzhong, respectively. A distinctive diurnal pattern in carboxylic acid concentrations (daytime>nighttime, t test, p<0.05) was observed during the growing season in Guiyang. Shangzhong witnessed higher concentration of these acids during the growing season than that during the non-growing season. Direct emissions from growing vegetation or soils probably account for the main provenance of the acids in the rural area. However, the opposite trend were found in Guiyang and the anthropogenic sources during the non-growing season were the main reason. By comparison of our result with the previous data about 20 years ago, we calculated that at least 42% of acetic acids and 69% of formic acid originated from the anthropogenic sources in Guiyang. Furthermore, the ratio of formate/acetate in gas phase larger than 1 suggest the oxidation of unsaturated hydrocarbons from the human activity and/or natural sources were the main origin of carboxylic acids in Guiyang. While The F/A ratio in gas phase was less than 1 in Shangzhong which indicate the direct emissions from biogenic sources. Oxalic acid was in similar amounts in both sites, indicating the common source of the acid.

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Section: Sample Collection and Analysismentioning

confidence: 99%

Urban and rural observations of carboxylic acids in rainwater in Southwest of China: the impact of urbanization

Xu¹,

Lee

2009

J Atmos Chem

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“…Karlsson et al [46] studied the influence of filtration, preservation and storing on the analysis of LMW organic acids in natural waters. Some authors added EDTA to liberate the organic acids from its possible complexes with metals [24,57,58].…”

Section: Sample Pretreatmentmentioning

confidence: 99%

Capillary electrophoresis for short‐chain organic acids and inorganic anions in different samples

et al. 2003

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This review article is a comprehensive survey of capillary electrophoresis methods developed for the measurement of short-chain organic acids and inorganic anions in a wide variety of matrices, such as food and beverages, environmental, industry, and other applications, as well as clinical applications in body fluids such as urine, plasma or cerebrospinal fluid. Details of sample pretreatment and of electrophoretic conditions have been collected in tables, arranged by the type of matrix. Strategies employed for method development for the analysis of these compounds by capillary electrophoresis in real samples are discussed.

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“…Collected samples are split in two aliquots. The fraction dedicated to organic acids analysis is sterilized on a 0.22um polycarbonate filter and frozen according to Karlsson et al [20]. The fraction dedicated to ultrafiltration is stored in the dark at +4°C.…”

Section: Storage and Analytical Proceduresmentioning

confidence: 99%

Towards a more comprehensive modelling of the behaviour of transuranic elements in agricultural soils: Experimental procedure for the study of the sorption/desorption parameters and speciation of transuranic actinides in the rhizosphere

et al. 2002

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Influence of filtration, preservation and storing on the analysis of low molecular weight organic acids in natural waters

Cited by 22 publications

References 21 publications

Urban and rural observations of carboxylic acids in rainwater in Southwest of China: the impact of urbanization

Urban and rural observations of carboxylic acids in rainwater in Southwest of China: the impact of urbanization

Capillary electrophoresis for short‐chain organic acids and inorganic anions in different samples

Towards a more comprehensive modelling of the behaviour of transuranic elements in agricultural soils: Experimental procedure for the study of the sorption/desorption parameters and speciation of transuranic actinides in the rhizosphere

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