Kinetic fluorimetric measurement of trace resorcinol in phenol mixtures.
A kinetic spectrofluorimetric method was studied to measure the concentration of trace resorcinol. The proposed method is based on the inhibitory effect of resorcinol on the oxidation of rhodamine B by potassium bromate in the medium of dilute sulfuric acid. The detection limit and linear range of the proposed resorcinol measurement method are 12 microg L(-1) and 24 approximately 280 microg L(-1), respectively. Relative standard derivations of eleven measurements for 80 microg L(-1) and 200 microg L(-1) resorcinol solutions are 2.12% and 1.08%, respectively. The trace of resorcinol can be determined directly by the proposed method without any pre-separation process when phenol and many other phenolic compounds are present.
Fan
Jing
J
School of Chemical and Environmental Science, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007 Henan, People's Republic of China. fanjing@henannu.edu.cn
Zhang
Tao
T
Sun
Jianhui
J
Fan
Maohong
M
D001959:Bromates / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry; D007700:Kinetics; D010084:Oxidation-Reduction; D010636:Phenols / Q000032:analysis*; D012118:Resorcinols / Q000032:analysis*; D012235:Rhodamines / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013464:Sulfuric Acids / Q000737:chemistry; D013696:Temperature
D001959:Bromates; D005456:Fluorescent Dyes; D010636:Phenols; D012118:Resorcinols; D012235:Rhodamines; D013464:Sulfuric Acids; C019536:potassium bromate; C029773:rhodamine B; C033158:sulfuric acid; C031389:resorcinol