A novel fluorescent distinguished probe for Cr (VI) in aqueous solution.
Salicylaldehyde rhodamine B hydrazone (SRBH) was developed as a new spectrofluorimetric probe for the selective and sensitive detection of CrO(4)(2-) in acidic conditions. The proposed method was based on the special oxidation reaction between non-fluorescent SRBH by potassium dichromate to produce a highly fluorescent rhodamine B, as a product. Under the optimum conditions described, the fluorescence enhancement at 591 nm was good linearly related to the concentration of CrO(4)(2-) from 1.0 x 10(-8) to 3.0 x 10(-7)M (0.42-12.6 ng mL(-1)) with a correlation coefficient of R(2)=0.9989 (n=10) and a detection limit of 1.5 x 10(-9)M (0.063 ng mL(-1)). The relative standard deviation (R.S.D.) was 2.0% (n=6). The proposed method was also successfully applied to the determination of chromium (VI) in drinking water, river water and synthetic samples.
Zheng
AiFang
A
Department of Life Sciences, Anqing Normal College, Anqing 246003, PR China.
Chen
JinLong
J
Wu
Genhua
G
Wu
Ganlin
G
Zhang
Yuan Guang
YG
Wei
HePing
H
D015374:Biosensing Techniques / Q000379:methods*; D002857:Chromium / Q000032:analysis* / Q000737:chemistry; D017608:Chromium Compounds / Q000032:analysis* / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D006835:Hydrazones / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D008954:Models, Biological; D009994:Osmolar Concentration; D012235:Rhodamines / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D012995:Solubility; D013997:Time Factors; D014867:Water / Q000737:chemistry / Q000494:pharmacology; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification
D017608:Chromium Compounds; D005456:Fluorescent Dyes; D006835:Hydrazones; D012235:Rhodamines; D014874:Water Pollutants, Chemical; C518469:salicylaldehyde rhodamine B; C545079:salicylaldehyde rhodamine B hydrazone; D014867:Water; D002857:Chromium