Methanedisulfonic Acid in a Chromium Plating Baths

Methanedisulfonic acid is used as catalyst in chromium plating baths. Its determination is required to keep the chromating quality of the bath. The sample requires a 2500-fold dilution. This application note shows the automatic Inline Dilution that proceeds in two steps. While one sample is analyzed, the timeoptimized method already dilutes the next sample. The MSM is regenerated using a 800 Dosino and the STREAM setup: after leaving the detector, the eluent is used for rinsing the regenerated MSM compartment.