Table 3.

Relationship between detector performance and length of etch in capillary outlet reported for DA.

	175-μm etch length	88-μm etch length	55-μm etch length
Detection Volume (pL)	110	50	30
Peak Efficiency (N)	19500 ± 100	31300 ± 600	75400 ± 400
Peak Area (pA*min)	30 ± 5	50 ± 6	60 ± 6

Separations were performed in a 16 μm i.d. capillary with etched capillary outlet lengths of 175, 88 and 55 μm. EC detection was performed using a 30 μm diameter carbon fiber microelectrode with a flame-etched 10 μm diameter tip. Detector volumes, peak efficiencies, and peak areas are calculated as reported as in Table 1. Sample concentrations and buffer conditions as in Figure 2.