Reservoir or Reference Inlet System

Highly volatile samples cannot be introduced into the ion source by means of a direct insertion probe even when cooling is applied. A reference inlet system or reservoir inlet system is better suited for that purpose [19]. The name of this type of 

Reservoir/reference inlet heated reservoir with sample vapor low to medium boiling liquids 

Direct insertion probe, DIP sample in heated/cooled glass/metal vial as particles or film of analyte solids, waxes or high-boiUng liquids 

Direct exposure probe, DEP sample particles or film of analyte on resistively heated metal filament solids of extremely low volatility, especially if thermally labile 

Gas chromatograph, GC elutes directly into ion source volatile components of mixtures 

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Section 6.4 deals with other EI-MS analyses of samples, i.e. analyses using direct introduction methods (reservoir or reference inlet system and direct insertion probe). Applications of hyphenated electron impact mass-spectrometric techniques for poly-mer/additive analysis are described elsewhere GC-MS (Section 7.3.1.2), LC-PB-MS (Section 7.3.3.2), SFC-MS (Section 13.2.2) and TLC-MS (Section 7.3.5.4). 

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