The subject invention provides methods, assays, and products for detecting small molecules in a sample, in particular, in both clinical and field settings. The method for detecting a small-molecule target, preferably, a synthetic cathinone in a sample comprises contacting the sample with an aptamer-based sensor selective for the small-molecule target, and detecting the small-molecule target in the sample. Specifically, the method utilizes an aptamer-based sensor comprising a dye binding to a three-way junction binding domain of an aptamer. Binding of small-molecule target to the aptamer displaces the dye, generating a spectroscopic signal that can be used for detection of the small-molecule target and quantitative measurement of the target concentration.
                            本发明提供了检测样品中小分子的方法、检测方法和产品,特别是在临床和现场环境中。检测样品中的小分子目标物(最好是合成
卡西酮)的方法包括将样品与对小分子目标物有选择性的基于适
配体的传感器接触,并检测样品中的小分子目标物。具体来说,该方法利用了一种基于适
配体的传感器,该传感器包括与适
配体的三向接合结合域结合的
染料。小分子目标物与适
配体结合会置换
染料,产生光谱信号,该信号可用于检测小分子目标物和定量测量目标物浓度。