关键词: 挥发酚, 氰化物, 阴离子合成洗涤剂, 硫化物, 连续流动分析仪

Abstract: Objective To establish a method for simultaneous determination of volatile phenol,cyanide,anionic synthetic detergent and sulfide in drinking water by continuous flow analyzer. Methods Using on-line distillation,the distillate reacted with 4-aminoantipyrine in the presence of basic potassium ferricyanide,and the content of volatile phenol was determined by spectrophotometry. Using on-line distillation,the distillate reacted with chloramine-T,and then reacted with isonicotinic acid pyrazolone to form blue compounds,the content of cyanide was determined by spectrophotometry. Usingon-line extraction,the content of anionic synthetic detergent was determined by methylene blue spectrophotometry,and sulfide was determined by the reaction of sulfur ion with N,N-dimethyl-p-phenylenediamine dihydrochloride. Results When the mass concentration of volatile phenol and cyanide was 2-100μg/L,the linear correlation coefficients（r） were≥0.999 9,and the detection limits were 0.2 and 0.4 μg/L respectively,the relative standard deviations were 0.75%-2.80% and 0.36%-2.26% respectively,and the recoveries were 98.0%-103.6% and 101.0%-102.0% respectively. When the mass concentration of anionic synthetic detergent and sulfide was 20-1000 μg/L,the linear correlation coefficients were 0.9995 and 0.999 9 respectively,and the detection limits were 4.4 and 1.6 μg/L respectively,the relative standard deviations were 0.55%-1.08% and 0.33%-1.97% respectively,and the recoveries were 93.6%-95.8% and 99%-101.9% respectively. Compared with the national standard method,the difference was not statistically significant. Conclusion Compared with the national standard method,this method saves time and labor,has lower detection limit,better precision and accuracy,less pollution,and is more suitable for the analysis and determination of large quantities of samples.

Key words: Volatile phenol, Cyanide, Anionic synthetic detergent, Sulfide, Continuous flow analyzer