EPA Method 7198

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EPA Method 7198:
CHROMIUM, HEXAVALENT (DIFFERENTIAL PULSE POLAROGRAPHY)

Summary:
Method 7198 measures the peak current produced from the reduction of Cr(VI) to Cr(III) at a dropping mercury electrode during a differential pulse voltage ramp.

Scope:
This method is used to determine the concentration of hexavalent chromium [Cr(VI)] in natural and waste waters and in EP extracts.

Report Number:
SW-846 Ch 3.3