Determination of Low-Molecular-Weight Organic Acids and Inorganic Anions by Gradient Elution Chromatography

摘要

Conditions of the separation and detection of organic and inorganic anions by gradient ion chromatography and suppressed conductivity detection were studied,and the procedure of gradient elution was optimized.A detection limit of 1 · 10~(-3)ug · L~(-1)was obtained using the pre-concentrated column and most relative standard deviations obtained in the determination of seven organic and inorganic anions were below 5 %.This method was proved to be simple,rapid and accurate for the separation and determination of low-molecular-weight organic acids and inorganic anions and could be applied in the analysis of the samples from water and steam systems of thermal power plants with satisfactory results.