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AN-S-315

Methanedisulfonic acid in chromium baths using nested dilution, Dosino Regeneration and STREAM


Summary

Methanedisulfonic acid (MDSA) is used as a catalyst in chromium plating baths. The MDSA concentration in the bath must be known in order to monitor the chromating. The analysis of a bath sample requires dilution by a factor of 2,500. This Application Note shows the automatic Inline Dilution that takes place in two steps. While one sample is being analyzed, the time-optimized dilution of the next sample is already running. The MSM is regenerated using an 800 Dosino and the STREAM setup: The eluent is used for rinsing the regenerated MSM after exiting the detector.

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Metrohm Nordic ApS

Lyskær 3C. 1. th.
2730 Herlev

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// Plating baths – other metals