Backman UV-VIS Spectrometer, Perkin-Elmer 8700 Gas Chromatograph, Perkin-Elmer HPLC and Mettler electronic balance. An interior environmentally controlled compartment held the biology experiment and the gas chromatograph mass spectrometer. In liquid chromatography-mass spectrometry (LC-MS), the GC is replaced with a liquid chromatograph. A gas chromatograph is a chemical analysis instrument for separating chemicals in a complex sample. It moves the analytes through the chromatograph. The eluate is the analyte material that emerges from the chromatograph. The gases are injected into the chromatograph and transported through a column. She developed mathematical relationships and equations and instrumentation for the first gas chromatograph. The sample is then admitted to a gas chromatograph. In this technique, a gas chromatograph is used to separate different compounds. Once the gases have been extracted they are then sent to the gas chromatograph. He chose her idea of the gas chromatograph for his dissertation. In 1907 he demonstrated his chromatograph for the German Botanical Society.