160 

 A standard of ethylene glycol (250 ^L) was diluted to 100 mL with methanol. 



A 0.5 p,L injection of the solution was made onto a 10.5 m x 0.178 mm i.d. DB-5 



FSOT column (df=0.4 p.m). The GC injection port temperature was set at 250°C; 



the helium carrier gas head pressure was set to 4 psig. The column oven was 



ramped after an initial 1.0 min hold at 30°C, up to 210°C at 15°C/min, then held at 



210°C for 5 min. The transfer line was concurrently ramped from 50°C to 215°C at 



20°C/min once the run had been started, and held at 215°C for the remainder of the 



analysis. 



Sample ionization was effected by PCI with methane reagent gas at an 



indicated source pressure of 1700 mtorr. The ion source temperature was set at 



150°C and the manifold temperature set at 70°C. The electron energy was 100 eV 



and the filament emission current was set at 200 p,A. The collision gas was argon 



at an indicated pressure of 1.5 mtorr in the collision cell; the collision energy was 



15 eV. The electron multiplier setting was -1200 V with the conversion dynode at - 



5 kV. The daughter spectrum was acquired at a scan rate of 1 s per scan. 



Daughter Library 



The data comprising the daughter library consist of data tabulated from 

 analyses of 40 standard compounds. The compounds differed in functional groups 

 (some containing more than one functional group) as well as including isomers for 

 comparison within a specific class. For solid-phase standards, approximately 50 mg 

 of the standard compound was dissolved in methanol in a 100 mL volumetric flask. 



