Spurious serotonin dimer formation using electrokinetic injection in capillary electrophoresis from small volume biological samples
Literature Information
Publication Date
2004-12-07
DOI
10.1039/B413024C
Impact Factor
4.616
Authors
Jeffrey N. Stuart, Nathan G. Hatcher, Xin Zhang, Rhanor Gillette, Jonathan V. Sweedler
View Original
Abstract
One normally assumes that the analytical measurement process does not introduce spurious compounds. Capillary electrophoresis is a separation method frequently used for small-volume biological measurements. We demonstrate the potential for creating new peaks in a capillary electropherogram when using electrokinetic injections and illustrate the potential deleterious effects with biological samples involving serotonin and nitric oxide measurements. Specifically, when measuring the serotonin content from individual neurons using electrokinetic injections from 360 nL stainless steel vials, we detect a new peak that we identify as a serotonin dimer. We do not observe this peak when using hydrodynamic injections.
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