Based on the laser-induced fluorescence principle,a portable measurement system for cardiac troponin Ⅰ(cTnⅠ) was developed.The cardiac troponin I firstly responded with the fluorescent reagent in the test cup.After removing excess fluorescent reagent by separation,the fluorescence signal in the test cup was correlated with the amount of cardiac troponin I.Through laser-induced fluorescence,the cardiac troponin I in the test cup was rapidly measured by the photoelectric conversion,weak signal amp...