I. Preface

Chlorides act as anode activators in the electroplating solution of electronic components. Therefore, the detection of chloride ions is an important test for electroplating solutions of electronic components

Measure indicators. This method uses silver nitrate as the titrant and takes advantage of the reaction principle that chloride ions and silver ions react to form silver nitrate, with silver ions being used for selection

The electrode was used as the measuring electrode, and the chloride ion content was detected by the JH-T6 fully automatic potentiometric titrator. The detection results were highly accurate and the detection efficiency was fast.

It is convenient to operate, reduces human interference at the same time, and enhances the stability of the detection.

Ii. Instruments and Reagents

2.1 Instruments

JH-T6 fully automatic potentiometric titrator, silver ion selective electrode, analytical balance, etc

2.2. Reagents

Nitric acid (analytical grade), silver nitrate standard solution (0.1mol/L), purified water.

Iii. Experimental Methods

3.1 Analysis Steps

Accurately measure 1.0mL of the sample to be tested with a 1mL pipette into a titration cup, add 50mL of water, place it on the titration stand, and start the pre-set

The method is to titrate with the calibrated silver nitrate solution until the potential suddenly crosses the endpoint, and record the amount used. At the same time, conduct blank experiments.

The parameters of the titrator are set as shown in Table 1

Table 1 Titration Parameter Settings

3. Test graph example

Iv. Results and Discussion

4.1 Experimental Results

The experimental results are shown in Table 2

Table 2 Test Results

4.2. Conclusion

The determination of chloride ions by potentiometric titration is rapid and has good data repeatability. It reduces the interference of indicator color on the results and improves the detection

Efficiency.

References

[1] Wan Zhuo. Detection Methods for Nickel Ions, Chloride Ions and Boric acid Content in Electroplating Nickel Solution [J]. Industrial Technological Innovation.