CHEMetrics' phenols kits employ the well-established 4-aminoantipyrine (4-AAP) method. Phenolic compounds react with 4-AAP in alkaline solution in the presence of ferricyanide to produce a red reaction product. Phenol, meta-substituted, ortho-substituted, and some para-substituted phenols (under proper pH conditions) are detected with this method. Applicable to the monitoring of phenolic compounds in wastewater. Results are expressed as ppm (mg/L) phenol. MDL: 0.05 ppm
