In a tracer test, applied tracers are introduced and transported with a working fluid so that the tracer response signals can be used to determine the target parameters of the aquatic system, such as temperatures, flow paths and residence times. Implementing a tracer test requires adherence to a series of specified steps, and a failure in one step can attribute to an unreliable tracer response. The presented work focuses on ameliorating tracer test results with regard to selecting a proper tracer compound, preserving the tracer test samples, and expanding the number of thermo-sensitive tracers.