Flow injection determination of p-aminophenol at trace level using inhibited luminol-dimethylsulfoxide-NaOH-EDTA chemiluminescence.
A novel flow injection procedure was developed for the determination of p-aminophenol (PAP) based on the inhibition by PAP of the chemiluminescence from luminol-dimethylsulfoxide (DMSO)-NaOH-EDTA system. The method has merits of higher sensitivity, wider linear range, simpler procedure, and a more rapid analyzing speed. It is applicable for the determination of PAP in the range of 2.5 x 10(-10)-5.0 x 10(-8) g mL(-1) with a detection limit of 1.9 x 10(-10) g mL(-1). The relative standard deviation (RSD) for 5.0 x 10(-9) g mL(-1) PAP is 0.78% (n=15). The method has been successfully used to determine PAP in industrial wastewaters and environmental waters. Additionally, the inhibition mechanism was also discussed briefly.
Xu
Hong
H
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Duan
Chun-Feng
CF
Zhang
Zhi-Feng
ZF
Chen
Jia-Yi
JY
Lai
Chun-Ze
CZ
Lian
Mei
M
Liu
Li-Juan
LJ
Cui
Hua
H
D000627:Aminophenols / Q000032:analysis*; D004121:Dimethyl Sulfoxide / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry*; D004784:Environmental Monitoring / Q000379:methods; D017022:Flow Injection Analysis / Q000379:methods*; D007220:Industrial Waste / Q000032:analysis; D008163:Luminescent Measurements / Q000379:methods*; D008165:Luminol / Q000737:chemistry*; D012680:Sensitivity and Specificity; D012972:Sodium Hydroxide / Q000737:chemistry*
D000627:Aminophenols; D007220:Industrial Waste; D012972:Sodium Hydroxide; D008165:Luminol; D004492:Edetic Acid; D004121:Dimethyl Sulfoxide