Inlet Systems
Split/splitless capillary inlet
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The multiple•modesplit/splitless capillary inlet system may be used with
any of the common types of capillary columns (fused silica, quartz, glass,
metal).
Specific sampling modes include:
Split, for major•componentanalyses.
Purged splitless, for trace•componentanalyses.
Each mode requires installation of a specific inlet insert.
Packing
SPLIT
SPLITLESS
Available Inlet Inserts
Figure 6-6
Note that performance in capillary analyses is closely related to the
insert used (and sampling mode). Inserts supplied are average , suitable
for good performance over a variety of general applications. For
specialized applications, however, to optimize inlet performance,
custom•madeinserts may be used: any custom•madeinsert must not
exceed 6.52 mm od, and must be 78.5 +
0.1 mm in length to operate
properly.
Carrier gas considerations
Carrier gas choice, and its average linear velocity through the column,
strongly influences column efficiency, analysis time, and system stability.
