title: [Studies and application of the interaction of pentamethyl-p-rosaniline hydrochloride 6B and nucleic acids system].
abstract: A cationic dye pentamethyl-p-rosaniline hydrochloride 6B was used as a chromic probe and its binding reaction with nucleic acids was studied. In the weak alkalescent medium, the cationic dye showed a decrease in absorption at its maximal absorption peak (584.5 nm) on binding to nucleic acids. Based on this fact, a new UV-Vis spectrophotometric method for the determination of nucleic acids has been developed. Effects of ion-intensity, surfactant and organic solvent were investigated to establish optimum reaction conditions, and then nucleic acids were detected with quantitative analysis. The calibration curves of nucleic acids such as hs-DNA, smDNA, ct-DNA and yeast-RNA were linear over the ranges 0.50-4.00 microg x mL(-1), 0.20-5.00 microg x mL(-1), 0.20-5.00 microg x mL(-1) and 0.20-4.50 microg(-1) x mL(-1), respectively. The detection limits (3sigma/K) were 0.082, 0.037, 0.038 and 0.041 microg x mL(-1). In applications to quantitative analysis of nucleic acids synthesis samples, the recoveries of DNA or RNA ranged from 93.5% to 105.0%. Furthermore, the mechanism of interaction of pentamethyl-p-rosaniline hydrochloride 6B and nucleic acids system was also discussed.
authors.affiliation: Department of Chemistry, Fuzhou University, Fuzhou 350002, China.
authors.forename: Xu-cong
authors.initials: XC
authors.lastname: Lin
authors.forename: Zeng-hong
authors.initials: ZH
authors.lastname: Xie
authors.forename: Liang-qia
authors.initials: LQ
authors.lastname: Guo
authors.forename: Shao-feng
authors.initials: SF
authors.lastname: Liu
authors.forename: Guo-nan
authors.initials: GN
authors.lastname: Chen
mesh_terms: D004247:DNA / Q000032:analysis* / Q000378:metabolism; D005456:Fluorescent Dyes; D057230:Limit of Detection; D009696:Nucleic Acids / Q000032:analysis; D012313:RNA / Q000032:analysis* / Q000378:metabolism; D012394:Rosaniline Dyes / Q000737:chemistry*; D012441:Saccharomyces cerevisiae / Q000235:genetics; D013050:Spectrometry, Fluorescence
chemical_list: D005456:Fluorescent Dyes; D009696:Nucleic Acids; D012394:Rosaniline Dyes; C025485:basic fuchsin; D012313:RNA; D004247:DNA