Coffee liquid substance detection method

Abstract

The invention proposes a coffee liquid substance detection method, which includes: providing a first substrate and a second substrate, which are combined with each other and respectively provided with corresponding light-emitting units and light detection units; placing the liquid to be measured Between the first substrate and the second substrate, when the reference light generated by the light-emitting unit is irradiated from above the liquid to be measured, different refraction angles will be produced. Refracted light, measure the refraction angle of the refracted light to calculate the liquid concentration of the liquid to be measured, and receive the reference light and the refracted light through the light detection unit to obtain the spectrum; wherein, when citric acid is added to the liquid to be measured, when the curve of the spectrum changes, It can be determined that the liquid to be tested contains ochrotoxin; wherein, the reference light system is selected from a wavelength in the liquid to be tested that does not absorb the light emitted by the light-emitting unit.

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