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Field-enhanced sample injection

FIGURE 13,14 Illustration of the mechanism or field-enhanced sample injection. [Pg.425]

Quirino, J.R and Terabe, S., Online concentration of neutral analytes for micellar electrokinetic chromatography. 5. Field-enhanced sample injection with reverse migrating micelles. Anal. Chem., 70, 1893, 1998. [Pg.427]

Sensitivity can also be enhanced by the use of field-amplified sample injection (FASI).2 In the FASI technique, sample is injected into the capil-... [Pg.189]

Sample concentration is another way to increase the sensitivity of a method. Besides liquid-liquid and solid-phase extraction protocols, which result in more concentrated solutions in addition to sample cleanup, several electrokinetic concentration techniques can be applied including sample stacking and field-amplified sample injection/stacking. Over 1000-fold sensitivity enhancement compared to hydrodynamic sample injection without stacking has been reported. When acetonitrile has been used for the removal of proteins from plasma, sample injections of up to 50% of the capillary volume become possible. Stacking techniques are also available for MEKC. [Pg.364]

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See also in sourсe #XX -- [ Pg.126 , Pg.423 ]



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Enhanced sampling

Field enhancement

Field sampling

Injecting sample

Sample injection

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