4.2.2.2: Injection Length
When introducing a sample to a CE system, the volume of liquid that enters the capillary is called the sample plug (See Figure 4.4). If the sample plug is very spread out, analytes will not separate into tight peaks and tailing or broadening can occur. A practical injection should be between 1% and 2% of capillary length.
Figure 4.4: Diagram of ample introduction and plug length
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