Groundwater in high iodine areasDetection of Iodine Ions

In this experiment, ion chromatography was used to analyzeGroundwater in a high iodine areainIodide ionTested

• Sample processing

Water sample analysis0.45um filter membrane filtrationTest on the machine.

• Experimental Section

• Instruments and Reagents

YC3000ion chromatograph、Degasser 、Anion chromatography column、 ASCD anionInhibit conductivity pool

Sodium Carbonate, Sodium Bicarbonate (Premium Pure, Kemio Reagent Co., Ltd.)

Potassium iodide and other high-quality pure reagents

• test conditions

eluentNa₂CO₃/NaHCO₃system, flow rate1.0mL/minColumn pressure 2.3MPa, room temperature, conductivity 32, current 67mA.

• Experimental Content

（1） Standard solution configuration and standard curve preparation:

①potassium iodideThe standard reagent is pre dried in an oven to a constant weight, weighed to 0.0002g, and placed in a 100mL volumetric flask. About 70mL of ultrapure water is added, and the sample is dissolved to the mark to obtain a concentration of 1.0mg/mLstandardSolution.

② Transfer 1.0mLIodide ionstandard溶Place the liquid in a 100mL volumetric flask and dilute with deionized water to the mark to obtain 10mg/LIodide ionWorking standard solution.

③ Take appropriate volumes separatelyIodide ionThe working standard solution is placed in a 100mL volumetric flask and diluted to the mark with deionized water to obtain a series of linear standard solutions with varying concentrations.

④ Test the linear standard solution from low to high concentration and plot the standard working curve.

（2） Water sample testing

sutra0.45um filter membrane filtrationTest on the machine.

（3） Data processing

Using the external standard method for data processing, the water sample was measuredIodide ionThe concentration.

• Result Analysis

• Iodine ion standard spectrum

• standard curve

• Conclusion

This experiment uses ion chromatography to determineUnderground in a high iodine areaIn the water sampleIodine ion content.This method is convenient and feasible,The data is relatively reliable.

test dataIodine ion concentration0.176mg/L.