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The amperometric biosensor was prepared by using a carbon paste electrode prepared with uricase from <jats:italic>Arthrobacter globiforms<\/jats:italic> and tetracyanoquinodimethane as electron transfer mediator. When incorporated into a flow\u2010injection system it was enabled to perform 50 measurements\/h of uric acid in the analytical range of 1\u2013100\u2005\u03bcmol dm<jats:sup>\u22123<\/jats:sup> with a relative standard deviation of 0.20% (<jats:italic>n<\/jats:italic>=14). The system was applied to human serum samples analysis providing good data correlation with those obtained by the reference spectrophotometric method. A linear relationship AM (\u03bcmol dm<jats:sup>\u22123<\/jats:sup>)=1.02 (\u00b10.05) SP (\u03bcmol dm<jats:sup>\u22123<\/jats:sup>) \u22120.12 (\u00b10.13) was obtained evidencing the absence of significant error. The constructed biosensor was successfully used for at least four months (250 assays) with only a 13% of decrease in the enzymatic activity.<\/jats:p>","DOI":"10.1002\/elan.200403142","type":"journal-article","created":{"date-parts":[[2004,12,20]],"date-time":"2004-12-20T09:16:07Z","timestamp":1103534167000},"page":"701-705","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["An Inexpensive Biosensor for Uric Acid Determination in Human Serum by Flow\u2010Injection Analysis"],"prefix":"10.1002","volume":"17","author":[{"given":"R.\u2005F.","family":"Dutra","sequence":"first","affiliation":[]},{"given":"K.\u2005A.","family":"Moreira","sequence":"additional","affiliation":[]},{"given":"M.\u2005I.\u2005P.","family":"Oliveira","sequence":"additional","affiliation":[]},{"given":"A.\u2005N.","family":"Ara\u00fajo","sequence":"additional","affiliation":[]},{"given":"M.\u2005C.\u2005B.\u2005S.","family":"Montenegro","sequence":"additional","affiliation":[]},{"given":"J.\u2005L.\u2005L.","family":"Filho","sequence":"additional","affiliation":[]},{"given":"V.\u2005L.","family":"Silva","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2005,4,7]]},"reference":[{"key":"e_1_2_1_1_2","first-page":"140","volume-title":"Clinical Diagnosis and Management by Laboratory Methods","author":"Woo J.","year":"1991"},{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1177\/000456329202900611"},{"key":"e_1_2_1_3_2","first-page":"67","volume":"37","author":"Dinckaya E.","year":"2000","journal-title":"Ind. 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