Flow injection analysis system with smart phone for the determination of total phenolic compounds in wastewater using Folin Ciocalteu reagent

Abstract

Smart phones are playing a big role in daily life and are being employed as supporting hardware in a variety of chemical analysis applications. flow injection analysis method for the rapid, simple, and straightforward determination of total phenols using Folin-Cioclteu  reagent .The sample or standard solutions were injection into a carrier stream to react with  reagent and  detected by spectrophotometer at  765 nm . The experimental conditions such as flow rate of reagent and carrier ,reagent volume ,length of reaction coil and concentration of reagent were optimized .A good linear calibration curve in the range of (250-2000 mg L^-1 ) was obtained with regression equation ( y=0.0123 x + 0.1857) ,( R= 0.999 ), the  limit of detection was in the amount of ( 0.0102  mg L^-1) .The method was successfully applied for the determination of the total phenols in wastewater .