| 摘要 |
A serial dual-optical path laser-induced fluorescence spectrometer, comprising a laser light source (2), a first plane mirror (1), a detection tank (4), a capillary column (3), a confocal optical measurement module (5), a semi-transparent mirror (16), a second plane mirror (6), a gradient filter (7), a stepping motor (8), a third plane mirror (9), a modulation board (13), a synchronous motor (15), a light beam distinguishing sensor (14), a photomultiplier (10), a control board (11) and a chromatographic data acquisition processor (12), wherein a laser beam from the laser light source (2) stimulates a sample to emit a fluorescent beam; then, the fluorescent beam and the laser beam are respectively input into the photomultiplier (10) through a sample optical path and a reference optical path; the control board (11) is used for processing a reference optical path signal, a sample optical path signal and an integral background signal from the photomultiplier (10),and finally, inputting same into the chromatographic data acquisition processor (12). The present invention eliminates the change in intensity of the laser light source (2), the change in the dark current of the photomultiplier (10) and the influences of parasitic light and light leakage on a system, and improves the measurement accuracy. |
