244 

 structure. Visual inspection of PCI data revealed that a r^ of 92 was plausible due 

 to the abundance of the apparent [M+H]^ ion at m/z 93. However, NCI mass 

 spectra did not contain an abundant [M-H]~ ion at m/z 91. The NCI spectra did 

 contain an ion at m/z 183 which was postulated to be the [Mj-H]" ion of this 

 compound. When the library searching was restricted to compounds with a r^ of 92, 

 this compound, 1,2,3-propanetriol (glycerol), was still not correctly identified. Final 

 confirmation was achieved by comparing the EI mass spectra to that of a standard 

 of glycerol. Glycerol was delivered into the mass spectrometer ion source via the use 

 of the direct insertion probe. When the ion source was saturated under these 

 conditions, it was revealed that self-CI had occurred upon elution of glycerol during 

 previous sample analyses. The presence of Cl-produced fragments in the EI mass 

 spectrum did not permit successful library searching. One final note merits 

 mentioning with respect to the importance of identifying this component in the 

 sample. The glycerol peak from all other subjects was miniscule in comparison to 

 the abundance found in this subject. It was later determined that this high level of 

 glycerol is attributable to the Sta-Sof-Fro™ hair and scalp spray used by this subject; 

 glycerol is one of the primary ingredients in the product. 



These two components are two of approximately 310 components observed 

 in these analyses; components identified and components suspected are listed in 

 table 5-2. In general, the subjects studied are similar with respect to composition of 

 emanations. There are some exceptions; further studies may reveal whether these 



