论文部分内容阅读
利用水相合成法合成了MPA(3-巯基丙酸)包覆的Mn掺杂Zn S量子点,基于该掺杂型量子点的室温磷光性质,建立了一种检测磺胺嘧啶钠(SDS)的新方法。该方法可以有效避免生物体液的自体荧光和散射光,且在水溶液检测时不需要添加任何诱导剂和除氧剂。在p H 7.4磷酸盐缓冲介质中,通过静电作用,SDS可以猝灭Mn掺杂Zn S量子点在590 nm处的磷光,其猝灭的磷光强度与SDS浓度呈良好的线性关系。其线性范围4~400μmol/L,相关系数R=0.99,检出限为0.78μmol/L,相对标准偏差(RSD)为2.6%。
A series of Mn-doped ZnS quantum dots coated with MPA (3-mercaptopropionic acid) were synthesized by aqueous phase synthesis. Based on the room-temperature phosphorescence properties of the doped quantum dots, a new method for the determination of sodium sulfadiazine (SDS) new method. The method can effectively avoid the autofluorescence and scattered light of the biological fluid, and does not need to add any inducer and oxygen scavenger when detecting the aqueous solution. In pH 7.4 phosphate buffer medium, SDS can quench the phosphorescence of Mn-doped ZnS quantum dots at 590 nm by electrostatic interaction, and the quenched phosphorescence intensity shows a good linear relationship with SDS concentration. The linear range was 4 ~ 400μmol / L, the correlation coefficient was 0.99, the detection limit was 0.78μmol / L, and the relative standard deviation (RSD) was 2.6%.