Detector for dynamically detecting influence of illumination on ultraviolet absorbance of substance

The invention provides a detector for dynamically detecting the influence of illumination on the ultraviolet absorbance of a substance. The detector comprises a measurement light source, a shutter, acollection box and a spectrometer, wherein the measurement light source is provided with the shutter; the measurement light source emits measurement light to irradiate a sample to be measured; a sampling opening and a transmitting opening are formed in the collection box; the to-be-measured sample is placed in the sampling opening; the collection box comprises an irradiation light source; the irradiation light source emits irradiation light to irradiate the sampling opening, the measurement light and the irradiation light irradiate the same position of the sample to be measured, the collectionbox collects the measurement light and the light after the irradiation light irradiates the sample to be measured, and the spectrometer receives the light collected by the collection box from the transmitting opening and meas