تصميم منظومة حقن جرياني لتقدير الفينول

Abstract

Flow injection designation have been done with simple procedure and low cost for phenol determination . The estimation condition flow rate , concentration of K3[Fe(CN)6] and H3BO3 as a carrier , reagent volume , reagent concentration , sample (phenol) volume and length of reaction coil were determined . The flow rate was 4.32 ml/min , the carrier concentration(1000,146 )ppm of boric acid and potassium frricyanide respectively ,the reagent concentration was 20 ppm of 4-aminoantipyrine with optimum volume equal 157 µl , sample(phenol) volume was 157 µl and coil reaction length was 150 cm . Under these conditions the interval samples were 120 sample per hour with detection limit 1×10-4 ppm and linearity within (0.01-10)ppm concentration range was 0.998 and RSD equal 0.355 for ten read at 7 ppm of concentration and finally with dispersion coefficient was 1.83.