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Nitrate in nickel baths

Starter substances, catalysts or contamination from previous steps in the μg/L to mg/L range can be determined by way of ion chromatography for the purpose of process control.

Application example:
One example here is the determination of nitrate in nickel baths to check the rinsing procedure and to identify unwanted contamination in a newly prepared nickel electroplating bath. By using the intelligent Partial Loop Injection Technique it is possible to cover a concentration range of 1:10‘000 with a single calibration. The sample volume varies within the range 2 - 200 μL.

Nitrate in nickel baths

Rinsing solution after bath cleaning; column: Metrosep A Supp 5 - 150/4.0; eluent: 3.2 mmol/L Na2CO3+ 1.0 mmol/L NaHCO3, 0.8 mL/min; column temperature: 25 °C; sample volume: 200 μL