Rapid determination of phenolic compounds in water samples by alternating-current oscillopolarographic titration.
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%.
Xiao
Jun-Ping
JP
Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China.
Wang
Xue-Feng
XF
Zhou
Qing-Xiang
QX
Fan
Xiao-Yuan
XY
Su
Xian-Fa
XF
Bai
Hua-Hua
HH
Duan
Hai-Jing
HJ
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
D001965:Bromides; D010636:Phenols; D017680:Potassium Compounds; D013464:Sulfuric Acids; D014874:Water Pollutants, Chemical; D012977:Sodium Nitrite; C033158:sulfuric acid; C039004:potassium bromide