title: A simple device for analogue recording of the abundance of selected ions from a combined gas chromatograph-mass spectrometer.
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation*; D013058:Mass Spectrometry / Q000295:instrumentation; D011453:Prostaglandins / Q000032:analysis; D013057:Spectrum Analysis / Q000295:instrumentation*
chemical_list: D011453:Prostaglandins