Ultraviolet-visible diode-array spectrophotometer as a detector for gas chromatography

An ultraviolet-visible diode-array spectrophotometer is used as a detector for gas chromatography. This detector can provide a full u.v.-visible spectrum of each compound as it elutes from the column, thus enhancing discrimination between incompletely separated components. A discrimination of ca. 1:5000 could be achieved for a mixture of toluene and benzene. The detection limit is comparable to that of the thermal conductivity detector, i.e., about 0.5 [mu]g for the various components. The detector is particularly useful when gases other than helium are used because the sensitivity does not depend on the gas used.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/25682/1/0000236.pd