Wastewater is generated at various points as part of the production process in electroplating installations. The toxicity level of the wastewater varies based on the process steps such as electroplating, pickling, passivating, degreasing, etc. Therefore, elaborate treatment is required for this wastewater to avoid human and environmental impact.
Metrohm provides a number of solutions for water and wastewater analysis. These solutions are helpful for users to improve the productivity of their processes and achieve better compliance with environmental regulations.
Ion Chromatography (IC)
A number of primary and secondary components of electroplating baths and trace amounts of impurities present in the form of polar substances or organic and inorganic ions can be determined using IC with high accuracy and reliability. Determining chemically similar substances individually in a single analysis is the key advantage of IC. The concentration of the analytes may extend from the ng/L levels to % ranges.
Monitoring of Wastewater and Rinsing Water
IC is ideally suited for monitoring process water, rinsing water, and wastewater. The versatile technique can provide answers to a range of questions pertaining to compliance with environmental legislation and effectiveness of quality requirements or cleaning steps during production. Moreover, discharges, carryover or impurities can be detected down to the ng/L range. The fully automated and highly accurate ultratrace analysis of cations and anions in ultrapure water is illustrated in Figure 1.
Figure 1. Fully automatic and precise analysis of cation traces of ion exchange eluates: column: Metrosep C 3 - 150/4.0; preconcentration column: Metrosep C PCC 1 HC/4.0; eluent: 2.5mmol/L HNO3, 1.0mL/min; column temperature: 45°C; sample volume: 10.0mL. Image credit: Metrohm.
This information has been sourced, reviewed and adapted from materials provided by Metrohm.
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