LIULing,ZHAOQian,ZHANG Yi.Ion Chromatography for Simultaneous Determination of 6 Kinds of Soluble Cations in Water[J].China Water & Wastewater,2023,39(12):149-154.
Ion Chromatography for Simultaneous Determination of 6 Kinds of Soluble Cations in Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第12期
Page:
149-154
Column:
Date of publication:
2023-06-17
- Abstract:
- To accurately determine the content of soluble cations in water, the testing conditions of ion chromatograph such as ratio of mobile phase, flow velocity and injection volume were optimized. The contents of the cations such as Li+, Na+, NH4+, K+, Ca2+ and Mg2+ in water could be rapidly and accurately determined simultaneously by Dionex ICS-1100 ion chromatograph under the following testing conditions: Ion Pac CS12A cation exchange column (250 mm×4 mm) with strong hydrophilicity as the separation column, methyl sulfonic acid with concentration of 22.0 mmol/L as the mobile phase, flow velocity of 1.0 mL/min and injection volume of 25 μL. The detection was completed within 13 min, and the analytical efficiency was improved by 28% compared with conventional ion chromatography. The optimized method had good linear correlation (r>0.999), low detection limit (0.01-0.02 mg/L) and high precision (RSD 0.2%-3.2%). The recovery rates ranged from 90.0% to 107.3%. The determination results of certified reference substances were within the confidence interval, and the relative error range was 2.4%-6.2%, indicating that the method was accurate and suitable for detection of cations in batch samples.
Last Update:
2023-06-17