Cadmium reagent is specially used for the detection and analysis of the content of metallic cadmium in the water sample to be tested. A set of reagents contains 4 bottles of liquid and 1 small package of solid, of which the reagents are divided into three parts: solid 'A reagent' and liquid 'B reagent'. The whole set of reagents can be tested 50 times. Cadmium reagents must be stored in a sealed state at room temperature and away from light, with a shelf life of 3 months.