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Clinical Chemistry 49: 340-341, 2003; 10.1373/49.2.340
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(Clinical Chemistry. 2003;49:340-341.)
© 2003 American Association for Clinical Chemistry, Inc.

Letters

Effect of Sulfamethoxazole on Clinical Capillary Zone Electrophoresis of Serum Proteins

Xavier Bossuyta, Jan Verhaegen, Godelieve Mariën and Norbert Blanckaert

Laboratory Medicine, University Hospitals Leuven, Katholieke Universiteit Leuven, Herestraat 49, B-3000 Leuven, Belgium

aAddress correspondence to this author at: Laboratory Medicine, Immunology, University Hospitals Leuven, Herestraat 49, B-3000 Leuven, Belgium. Fax 32-16-34-70-42; e-mail xavier.bossuyt@uz.kuleuven.ac.be.

The first 20% of the full text of this article appears below.


To the Editor:

Capillary zone electrophoresis (CZE) using fused-silica capillaries has become a well-accepted method for the separation of serum proteins and for the detection of monoclonal components in human serum (1)(2)(3)(4). In earlier methods, such as those that use agarose gels, quantification of the protein fractions was based on dye binding, whereas CZE uses ultraviolet detection at 214 nm for direct protein quantification via the peptide bonds. Any substance or drug that is present in serum and that absorbs at 214 nm potentially can interfere with CZE analysis. Few interfering substances have been reported. Radiocontrast media that absorb at 214 nm interfere with CZE and can simulate a monoclonal component (5)(6)(7), . . . [Full Text of this Article]






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