A method for measurement of a target substance in a sample by means of fluorescence, which comprises the step of carrying out the measurement in the presence of (1) a specific fluorescent probe which specifically reacts with the target substance to generate fluorescence, and (2) a donor which, per se, has long-lived fluorescence and is capable of inducing fluorescence resonance energy transfer to the specific fluorescent probe that acts as an acceptor, provided that the donor forms no binding to the specific fluorescent probe by means of a chemical bond; and the step of converting fluorescence, wherein said fluorescence is resulted from a reaction between the acceptor and the target substance, into long-lived excitation fluorescence by the fluorescence resonance energy transfer which is induced on the acceptor.
一种利用荧光测量样品中目标物质的方法,该方法包括在以下物质存在的情况下进行测量的步骤:(1) 与目标物质发生特异性反应以产生荧光的特异性荧光探针;(2) 本身具有长寿命荧光并能诱导荧光共振能量转移到作为受体的特异性荧光探针上的供体,条件是供体与特异性荧光探针之间不通过
化学键形成结合;以及将荧光转化为长效激发荧光的步骤,其中所述荧光是由受体和目标物质之间的反应产生的,通过在受体上诱导的荧光共振能量转移将荧光转化为长效激发荧光。