LIULing,WANGLi-xiang,WUYu-xin.Determination of Anions in Acidic Mine Water from Pyrite Ore Mining Area Using Solid Phase Extraction and Ion Chromatography[J].China Water & Wastewater,2025,41(6):130-136.
Determination of Anions in Acidic Mine Water from Pyrite Ore Mining Area Using Solid Phase Extraction and Ion Chromatography
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第6期
Page:
130-136
Column:
Date of publication:
2025-03-17
- Keywords:
- ion chromatography; solid phase extraction; acidic mine water; anion; improvement and optimization
- Abstract:
- To rapidly and accurately determine the concentrations of F-, Cl-, NO2-, NO3- and SO42- in acidic water from a pyrite ore mining area, the chromatographic conditions such as ICS-1100 ion chromatograph and flow compatibility ratio were improved and optimized. Specifically, the hydrophilic IonPac AS19 anion exchange column (250 mm×4 mm), the IonPac AG19 anion protection column (50 mm×4 mm) and the AERS 500 automatic regeneration inhibitor (4 mm) were selected. A 20.0 mmol/L KOH solution was employed as the mobile phase, with a flow rate of 1.0 mL/min and an injection volume of 25 μL. Solid phase extraction pretreatment was adopted, and the retention time of each component in the standard chromatogram was used for qualitative analysis, while the chromatographic peak area external standard method was used for quantitative analysis. Compared to traditional ion chromatography, this method achieved rapid detection within 9 minutes, thereby enhancing analysis efficiency by 40%. The optimized method exhibited excellent correlation (r>0.999), a low detection limit (0.006-0.016 mg/L), high precision (relative standard deviation was 0.2%-3.9%), and a recovery rate range of 89.2%-103.0%. The determined results of the certified reference materials fell within the confidence interval, with a relative error range of 1.9% to 4.8%. The proposed method is characterized by its simplicity, rapidity, and high sensitivity, making it particularly suitable for the detection of anions in acidic water samples with complex matrix.
Last Update:
2025-03-17