Fluorescence quenching method for the determination of sodium carboxymethyl cellulose with acridine yellow or acridine orange.
In near neutral to weak basic media, sodium carboxymethyl cellulose (NaCMC) will dissociate to become a macro polymeric anion, which can react with acridine yellow (AY) or acridine orange (AO) to form an ion-association complex resulting in fluorescence quenching of the acridine dyes. The maximum fluorescence quenching wavelength is 505 nm (lambda(ex)=440 nm) for AY system and 530 nm (lambda(ex)=493 nm) for AO system, respectively. The fluorescence quenching values (DeltaF) are directly proportional to the concentrations of NaCMC and the linear ranges are 20.0-4000 microg/L for AY system and 20.0-7000 microg/L for AO system, separately. This method has high sensitivity and the detection limits for NaCMC are 58.0 microg/L (AY system) and 157.2 microg/L (AO system). The effects of coexistent substance have been investigated, and the results show that this method has a relatively good selectivity. A fluorescence quenching method for the determination of NaCMC based on the ion-association reactions of CMC polymeric anion with a basic acridine dye was developed. The method is sensitive, simple and fast.
Liu
Shao Pu
SP
School of Chemistry and Chemical Engineering, Southwest China Normal University, Chongqing 400715, China. liusp@swnu.edu.cn
Sa
Chen
C
Hu
Xiao Li
XL
Kong
Ling
L
D000165:Acridine Orange / Q000494:pharmacology*; D000609:Aminoacridines / Q000494:pharmacology*; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000494:pharmacology*; D008956:Models, Chemical; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence / Q000295:instrumentation / Q000379:methods*; D013997:Time Factors
D000609:Aminoacridines; D005456:Fluorescent Dyes; D000165:Acridine Orange; D002266:Carboxymethylcellulose Sodium; C025902:acridine yellow