| 摘要 |
PURPOSE:To obtain a long-life liquid chromatography apparatus with a high sensitivity over a broad wavelength range, by employing a light source into which a Ta halide, Hg and a rare gas are sealed while a photo detector such as UV absorbing detector is provided. CONSTITUTION:A light source 1 in which TaI5, Hg and Ar as a rare gas are sealed into a light emitting tube made of quartz is used to hold a continuous spectrum at 190-450nm by molecular luminescence of the Ta halide and mercury and moreover, a greater luminous intensity is obtained at a specified wavelength where line spectrum overlaps due to atoms of Ta and Hg. Ultraviolet rays from the light source 1 enters a spectroscope 3 passing through a dual type flowcell 2 with a sample cell and reference cell integrated and dispersed with a diffraction grating to be converted into an electrical signal with UV absorbing detector 4 provided for each wavelength. This signal is converted into a linear signal with a LOG converter 5 in terms of absorbance and the difference between the sample beam and the reference beam is determined with a differential circuit 6 to be outputted to a recorder 7. This enables continuous analysis with a high sensitivity at a low power while producing a chromatography apparatus with a higher light source life. |
