以Pb2+为离子微扰剂时,酚藏花红(PF)与异硫氰酸荧光素(FITC)均能在滤纸上分别发射强而稳定的室温磷光(RTP)信号;当两者混合时,发现PF和FITC的RTP信号均显著增强;而1.12 ag DNA spot-1均使PF和FITC的RTP信号剧烈增强,在634与659 nm处PF和...以Pb2+为离子微扰剂时,酚藏花红(PF)与异硫氰酸荧光素(FITC)均能在滤纸上分别发射强而稳定的室温磷光(RTP)信号;当两者混合时,发现PF和FITC的RTP信号均显著增强;而1.12 ag DNA spot-1均使PF和FITC的RTP信号剧烈增强,在634与659 nm处PF和FITC的ΔIp与DNA含量成线性关系,据此建立了FITC-PF双发光磷光探针测定蛋白质的新方法.该方法的检出限(LD)分别为14zg DNA spot–1(PF)和18zg DNA spot–1(FITC),灵敏度高,并成功用于花蜜样品中DNA含量的测定.同时探讨了FITC-PF双发光磷光探针测定痕量DNA的反应机理.展开更多
The synthesis of a novel long-wavelength fluorescent probe, 3-epoxypropoxy fluorescein, and its properties for labeling of histidine are briefly described in this communication. The probe is highly selective for histi...The synthesis of a novel long-wavelength fluorescent probe, 3-epoxypropoxy fluorescein, and its properties for labeling of histidine are briefly described in this communication. The probe is highly selective for histidine, and other amino acids with a concentration of 1 000 times higher than that of histidine did not show noticeable interferences. As an application of this probe, fluorescent labeling of histidine in human serum was attempted and the obtained results were in agreement with those given by using histidine-nickel complex adsorptive voltammetry, both of which were within the normal range of the results reported in literatures.展开更多
文摘以Pb2+为离子微扰剂时,酚藏花红(PF)与异硫氰酸荧光素(FITC)均能在滤纸上分别发射强而稳定的室温磷光(RTP)信号;当两者混合时,发现PF和FITC的RTP信号均显著增强;而1.12 ag DNA spot-1均使PF和FITC的RTP信号剧烈增强,在634与659 nm处PF和FITC的ΔIp与DNA含量成线性关系,据此建立了FITC-PF双发光磷光探针测定蛋白质的新方法.该方法的检出限(LD)分别为14zg DNA spot–1(PF)和18zg DNA spot–1(FITC),灵敏度高,并成功用于花蜜样品中DNA含量的测定.同时探讨了FITC-PF双发光磷光探针测定痕量DNA的反应机理.
文摘The synthesis of a novel long-wavelength fluorescent probe, 3-epoxypropoxy fluorescein, and its properties for labeling of histidine are briefly described in this communication. The probe is highly selective for histidine, and other amino acids with a concentration of 1 000 times higher than that of histidine did not show noticeable interferences. As an application of this probe, fluorescent labeling of histidine in human serum was attempted and the obtained results were in agreement with those given by using histidine-nickel complex adsorptive voltammetry, both of which were within the normal range of the results reported in literatures.