| abstract |
(57) [Problem] To provide an automatic, inexpensive, and online method for measuring heavy metals and environmental pollutants, which has conventionally depended on engineers. A colorimeter having an injection mechanism for feeding a fixed amount of a sample to a flow path formed on a surface of a substrate, and a light emitting unit and a light receiving unit disposed apart from each other in the flow path. A method for detecting a chemical substance using a detection device comprising: adding at least one type of reagent to the sample to color the sample or forming a derivative, A method for detecting a chemical substance, wherein spectroscopic analysis of a specific substance in a sample is performed by the colorimeter. |