“…This progress was motivated by the biomedical profession's desire to utilize metabolic profiles to assess patients' health (Horning and Horning, 1971;Zlatkis et al,.. 1973, Teranishi et aL., 1972 and the desire to monitor drinking waters and other natural freshwaters for volatile pollutants Novotny et aL., 1974;Dowty et aL., 1975;Bertsch et aL., 1975;Hites, 1977). These advances were primarily of twö kinds.…”