Determination of various inorganic anions and organic acids in the atmospheric particulate matter using capillary zone electrophoresis with indirect UV detection

作者：Yoshikawa Kenji^*; Shimizu Miki; Matsumura Toshiro; Sakuragawa Akio

来源：International Journal of Environmental Analytical Chemistry, 2018, 98(8): 789-798.

DOI：10.1080/03067319.2018.1503254

• Capillary zone electrophoresis
• organic acids
• atmospheric particulate matter
• solvent extraction
• particle size distribution

Capillary zone electrophoresis with indirect UV detection was developed for the simultaneous analysis of inorganic anions and organic acids using a mixed solution of 2,6-pyridinedicarboxylic acid and cetyltrimethylammonium hydroxide as the background electrolyte (BGE). The parameters which influence the separation, such as indirect UV detection wavelength, BGE conditions, applied voltage and extraction conditions were investigated. Thirteen inorganic anions and organic acids were detected within 20min. The calibration curves of each analyte were linear with correlation coefficients greater than 0.991. The relative standard deviations (n=10) of the peak areas ranged from 0.6% to 3.3%. The detection limits for these species ranged from 0.4 to 1.4mg/L at a signal-to-noise ratio of 3. The recovery rate of each analyte was more than 80% under optimised extraction conditions, except for nitrite. The proposed method was applied towards the analysis of inorganic anions and organic acids in the atmospheric particulate matter using an Andersen sampler. The particle size of the particulate matter was determined, but not the size of the anions.

• 出版日期2018