CdTe量子点作探针共振瑞利散射法测定肝素钠
Resonance Rayleigh Scattering Methed for Determineation of Heparin Using CdTe QDs as the Probe
-
摘要: 在水相中低温条件下制备了巯基乙胺稳定的CdTe量子点(CdTe QDs).基于肝素钠(Heparin)对巯基乙胺稳定的CdTe QDs共振瑞利散射(RRS)的增强作用,同时二级散射(SOS)和倍频散射(FDS)也相应增强,建立了一种快速、简便、定量测定肝素的新方法,同时讨论了最佳反应条件和影响因素,以RRS为例,在311 nm处,RRS的光谱强度与肝素钠的质量浓度c/(I-I_0)有良好的线性关系(r=0.999 1),线性范围13.5～1000 ng/mL,检出限(3σ)为4.04 ng/mL.可用于血样中肝素钠的测定.
-
关键词:
- CdTe量子点,共振瑞利散射,肝素钠
Abstract: Aqueous cysteamine-capped CdTe quantum dots(QDs) were prepared under low temperature.A simple and rapid quantitative method for heparin determination was proposed, based on the fact that hepa-tin can enhance CdTe QDs resonance Rayleigh scattering (RRS) and the intensities of second-order scatter-ing (SOS) and frequency-doubling scattering (FDS).Factors affecting RRS for detecting heparin with cys-teamine-capped CdTe QDs were studied.At 311 nm, the RRS calibration plot of C/(I-I_0) with concen-tration of heparin was linear in the range of 13.5-1 000 ng/mL with a correlation coefficient of 0.999.The limit of detection (30) was 4.04 ng/mL. -
-
计量
- 文章访问数: 307
- HTML全文浏览数: 127
- PDF下载数: 0
- 施引文献: 0
下载: