title: Rapid determination of phenolic compounds in water samples by alternating-current oscillopolarographic titration.
abstract: A rapid, simple and sensitive method was demonstrated for the determination of phenolic compounds in water samples by alternating-current oscillopolarographic titration. With the presence of sulfuric acid, phenol could be transferred into a nitroso-compound by reacting with NaNO2. The titration end-point was obtained by the formation of a sharp cut in the oscillopolarographic with infinitesimal NaNO2 on double platinum electrodes. The results showed that phenol concentration had an excellent linear relationship over the range of 4.82 x 10(-6)-9.65 x 10(-3) mol/L, the RSD of the proposed method was lower than 1.5%, and the spiked recoveries of three real water samples were in the range of 95.6%-106.9%.
authors.affiliation: Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Jun-Ping
authors.initials: JP
authors.lastname: Xiao
authors.forename: Xue-Feng
authors.initials: XF
authors.lastname: Wang
authors.forename: Qing-Xiang
authors.initials: QX
authors.lastname: Zhou
authors.forename: Xiao-Yuan
authors.initials: XY
authors.lastname: Fan
authors.forename: Xian-Fa
authors.initials: XF
authors.lastname: Su
authors.forename: Hua-Hua
authors.initials: HH
authors.lastname: Bai
authors.forename: Hai-Jing
authors.initials: HJ
authors.lastname: Duan
mesh_terms: D001965:Bromides / Q000737:chemistry; D004563:Electrochemistry; D006863:Hydrogen-Ion Concentration; D010636:Phenols / Q000032:analysis* / Q000737:chemistry; D017680:Potassium Compounds / Q000737:chemistry; D015203:Reproducibility of Results; D012977:Sodium Nitrite / Q000737:chemistry*; D013464:Sulfuric Acids / Q000737:chemistry; D013696:Temperature; D017186:Titrimetry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D001965:Bromides; D010636:Phenols; D017680:Potassium Compounds; D013464:Sulfuric Acids; D014874:Water Pollutants, Chemical; D012977:Sodium Nitrite; C033158:sulfuric acid; C039004:potassium bromide