EPA Method 9067

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EPA Method 9067:

This method is based on the coupling of phenol with MBTH in an acid medium using ceric ammonium sulfate as an oxidant. The coupling takes place in the p-position; if this position is occupied, the MBTH reagent will react at a free o-position. The colors obtained have maximum absorbance from 460 to 595 nm. For phenol and most phenolic mixtures, the absorbance is 520 and 490 nm.

This method is applicable to the analysis of ground water, drinking, surface, and saline waters, and domestic and industrial wastes.

Report Number:
SW-846 Ch 5