Chanzhi ReservoirwatersampleAnalysis of Four Anions

Reservoir water is an important reserve of surface freshwater resources and plays a crucial regulatory role in alleviating the shortage of urban freshwater resources. Therefore, the detection of reservoir water quality is also an important task carried out by environmental protection departments, water resources departments, and disease control departments.

• Sample processing

After filtering the water sample through a 0.45 μ m needle filter,Machine testing.

• 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.)

High grade pure reagents such as sodium fluoride, sodium chloride, sodium sulfate, and sodium nitrate

• test conditions

Rinsing solution:Na₂CO₃1.8mol/L+ NaHCO₃1.7mol/L，Current Speed:1.4mL/minColumn pressure 5.7MPa, room temperature, conductivity 28, current 67mA.

• Experimental Content

（1） Standard solution configuration and standard curve preparation:

①Sodium fluoride and sodium chloride are waiting for ion detectionThe 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/mLTest ionstandardSolution.

② Transfer 1.0mLTest ion standard solutionPlace it in a 100mL volumetric flask and dilute with deionized water to the mark to obtain 10mg/LTest ionWorking standard solutionOr mix the ion standard solution to be tested.

③ Take appropriate volumes separatelyTest ionThe working standard solution is placed in a 100mL volumetric flask and diluted to the mark with deionized water to obtain the concentration from low to highTest ionSeries linear standard solution.

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

（2） Water sample testing

The water sample solution was filtered through a 0.45um membrane and tested on the machine; If the concentration is too high, it can be diluted and measured.

（3） Data processing

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

• Result Analysis

• Standard spectrum of the tested ion

• standard curve

• Spectral diagram of the water sample to be tested
• Conclusion

This experiment uses ion chromatography to measureDingchan Zhi Reservoir waterIn the sampleAnion content，0.45umfilter membraneFilter and inject directly into the sample.This method is convenient, feasible, and has high credibility.

The collected water sample testing data is as follows:

Fluoride ion:0.41mg/L ；Chloride ion:51.65mg/L

Nitrate ion:1.49 mg/L； Sulfate ion:12.74mg/L