SIMPLE METHOD FOR PREVENTING UNSUITABLE SOLVENTS FROM ENTERING GAS-CHROMATOGRAPHIC DETECTORS

A simple method for preventing unsuitable solvents and other substance s from entering gas chromatographic detectors is described. A split ve nt was constructed by connecting the outlet of the column to the unuse d injector and the detector with a press-tight Y-splitter and two shor t capillary columns. Unsuitable solvents and other substances can be d ischarged through the unused injector by keeping the injector open for a few minutes. When the nut on the injector is tightened, all the eff luent from the analytical column enters the detector. Use of this spli t vent can avoid or reduce the adverse effects of unsuitable solvents on the detector performance.