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- W2024797892 abstract "Abstract An analytical method for low-molecular-mass organic acids (C n ) in fogwater, which contains chloride, nitrate and sulfate abundantly, was developed using isocratic ion chromatography with automatic column switching. Nitrate and sulfate ions were allowed to separate from the organic acids by fast elution with a backward flow of eluent through the precolumn. Part of the chloride passed through the precolumn together with the organic acids at the specified switching time. Two types of connected columns were examined for the chromatographic separation of 20 species of organic acids. Lactate, acetate, isobutyrate, n -butyrate and methacrylate were separated with AG4A-SC+AS4A-SC+AS11 columns (method A), and lactate, acetate, glycolate isobutyrate, pyruvate and crotonate with AS11+AS11 columns (method B). The determination of pyruvate was free from interfering crotonate even though they were incompletely separated by method A. By method B, formate was also free from interfering n -butyrate. The analysis times for the methods were 18 and 23 min, respectively. Lactate, glycolate, formate and pyruvate were detected in fog samples. This method is suitable for routine analysis of fogwater samples due to its procedural and instrumental simplicity." @default.
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- W2024797892 title "Determination of low-molecular-mass organic acids in fogwater by ion-exchange chromatography with automatic column switching" @default.
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- W2024797892 doi "https://doi.org/10.1016/s0021-9673(97)00113-1" @default.
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