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Chen, Fang,Huang, Jianping,He, Zhike Korean Chemical Society 2006 Bulletin of the Korean Chemical Society Vol.27 No.10
The solution of $[Ru(phen)_2(dppz)]^{2+}$ and SDS has high Resonance Light Scattering (RLS) signals due to $[Ru(phen)_2(dppz)]^{2+}$ assemble on the surface of the SDS micelle. Because of the high affinity ($KB\geq10^6\;L\;mol^{-1}$) between $[Ru(phen)_2(dppz)]^{2+}$ and DNA, the adding of DNA in the solution of $[Ru(phen)_2(dppz)]^{2+}$-SDS makes the dissociation of $[Ru(phen)_2(dppz)]^{2+}$-SDS, and results in decreasing of the RLS signals and increasing of the absorbance. Based on this, a novel method is proposed for DNA assay. Under optimum condition, good linear relationship was obtained within the concentration range of 0.018-1.26 $\mu g\;mL^{-1}$, the linear equation is $I_{RLS}$ = 504.8-348.8 c (c: $\mu g\;mL^{-1}$) and the correlation coefficient (r) is 0.9992. The detect limit for calf thymus DNA is 8.6 ng $mL^{-1}$. The proposed method was successful applied to determine the extracted colibacillus plasmid DNA.
Fang Chen*,Jianping Huang,Zhike He 대한화학회 2006 Bulletin of the Korean Chemical Society Vol.27 No.10
The solution of [Ru(phen)2(dppz)]2+ and SDS has high Resonance Light Scattering (RLS) signals due to [Ru(phen)2(dppz)]2+ assemble on the surface of the SDS micelle. Because of the high affinity (KB ³ 106 L mol-1) between [Ru(phen)2(dppz)]2+ and DNA, the adding of DNA in the solution of [Ru(phen)2(dppz)]2+-SDS makes the dissociation of [Ru(phen)2(dppz)]2+-SDS, and results in decreasing of the RLS signals and increasing of the absorbance. Based on this, a novel method is proposed for DNA assay. Under optimum condition, good linear relationship was obtained within the concentration range of 0.018-1.26 mg mL-1, the linear equation is IRLS = 504.8-348.8 c (c: mg mL-1) and the correlation coefficient (r) is 0.9992. The detect limit for calf thymus DNA is 8.6 ng mL-1. The proposed method was successful applied to determine the extracted colibacillus plasmid DNA.