In order to better serve the soil investigation work in water conservancy and hydropower engineering,geotechnical engineering and other industries,a new method for the determination of dissolved salt gypsum(CaSO4· 2H2O)was established by ion chromatography with hydrochloric acid solution extraction.Sulfate was determined with 4.5mM Na2CO3/1.4mM NaHCO3 eluent at a flow rate of 1.0mL·min-1.The relative standard deviation(RSD)of the method was 2.3％,the recovery was 91.0％～102％,and the detection limit was 0.003g·kg-1.This method was simple,high sensitivity and accuracy,and was suitable for the determination of large quantities of samples in engineering investigation.
关键词
盐酸溶液/离子色谱法/中溶盐石膏/工程
Key words
hydrochloric acid solution/ion chromatography/dissolved salt gypsum/engineering
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