Document Detail

The analysis of uric acid in urine using microchip capillary electrophoresis with electrochemical detection.
MedLine Citation:
PMID:  11891710     Owner:  NLM     Status:  MEDLINE    
Clinical studies have linked irregular concentrations of uric acid in urine to several diseases. Conventional methods for the measurement of uric acid are however temperature-dependent, expensive, and require labile reagents. The miniaturization of analytical techniques, specifically capillary electrophoresis, offers an ideal alternative for clinical analyses such as uric acid determination. The added benefits include reduced reagent and analyte consumption, decreased maintenance costs, and increased throughput and portability. A microchip capillary electrophoresis-electrochemical system for the analysis of uric acid in urine is described. The poly(dimethylsiloxane) (PDMS)/glass microchip utilizes amperometric detection via an off-chip platinum working electrode. Linear responses from 1 to 165 microM and 15 to 110 microM were found for dopamine and uric acid, respectively. The limit of detection for both compounds was 1 microM. Once characterized, the system was used to measure the concentration of uric acid in a dilute urine sample in less than 30 s. The measured uric acid concentration was verified with the uricase reaction and found to be acceptable. Six additional urine samples were evaluated with the microchip device and the uric acid concentration for each sample was found to be in the expected clinical concentration range.
Joseph C Fanguy; Charles S Henry
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Electrophoresis     Volume:  23     ISSN:  0173-0835     ISO Abbreviation:  Electrophoresis     Publication Date:  2002 Mar 
Date Detail:
Created Date:  2002-03-13     Completed Date:  2002-07-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8204476     Medline TA:  Electrophoresis     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  767-73     Citation Subset:  IM    
Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA.
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MeSH Terms
Dopamine / urine
Electrochemistry / methods
Electrophoresis, Capillary / methods*
Indicators and Reagents
Reproducibility of Results
Sensitivity and Specificity
Uric Acid / urine*
Reg. No./Substance:
0/Indicators and Reagents; 69-93-2/Uric Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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