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Reduction of interference signal of ascorbate and urate in poly(pyrrole)-based ammonia sensors in aqueous solutions
The present paper outlines the methods used to reduce the interference signal caused by ascorbic and uric acids on an ammonia amperometric sensor in aqueous solutions. The sensor was prepared by electrochemical deposition of poly(pyrrole), doped with dodecylbenzenesulfonic anions (DBS), onto platinu...
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Published in: | Electrochimica acta 2004-09, Vol.49 (22), p.3665-3670 |
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container_end_page | 3670 |
container_issue | 22 |
container_start_page | 3665 |
container_title | Electrochimica acta |
container_volume | 49 |
creator | Vidotti, Marcio Dall’Antonia, Luiz H Cintra, Elaine P Córdoba de Torresi, Susana I |
description | The present paper outlines the methods used to reduce the interference signal caused by ascorbic and uric acids on an ammonia amperometric sensor in aqueous solutions. The sensor was prepared by electrochemical deposition of poly(pyrrole), doped with dodecylbenzenesulfonic anions (DBS), onto platinum substrates. Poly(pyrrole) films were coated with different membranes, aiming to find different ways to diminish the interference response of anionic species such as ascorbate and urate. Nafion
®, cellulose acetate and poly(5-amino-1-naphthol), were studied as permselective layers. This last polymer is electroactive, offering the possibility of its formation by electrochemical deposition onto poly(pyrrole). In order to verify the stability of poly(5-amino-1-naphthol) when used in basic medium, Raman spectra were taken from these modified electrodes. Further, all sensors showed a linear response and a good sensitivity in a concentration range from 0 to 120
μmol
L
−1 which covers the ammonia concentration range typical of clinical samples (18–72
μmol
L
−1). |
doi_str_mv | 10.1016/j.electacta.2003.11.034 |
format | article |
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®, cellulose acetate and poly(5-amino-1-naphthol), were studied as permselective layers. This last polymer is electroactive, offering the possibility of its formation by electrochemical deposition onto poly(pyrrole). In order to verify the stability of poly(5-amino-1-naphthol) when used in basic medium, Raman spectra were taken from these modified electrodes. Further, all sensors showed a linear response and a good sensitivity in a concentration range from 0 to 120
μmol
L
−1 which covers the ammonia concentration range typical of clinical samples (18–72
μmol
L
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®, cellulose acetate and poly(5-amino-1-naphthol), were studied as permselective layers. This last polymer is electroactive, offering the possibility of its formation by electrochemical deposition onto poly(pyrrole). In order to verify the stability of poly(5-amino-1-naphthol) when used in basic medium, Raman spectra were taken from these modified electrodes. Further, all sensors showed a linear response and a good sensitivity in a concentration range from 0 to 120
μmol
L
−1 which covers the ammonia concentration range typical of clinical samples (18–72
μmol
L
−1).</description><subject>Amonia sensor</subject><subject>Analytical chemistry</subject><subject>Chemistry</subject><subject>Conducting polymers</subject><subject>Exact sciences and technology</subject><subject>General, instrumentation</subject><subject>Interference signal</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNqFkFuLFDEQhYO44LjrbzAvij50m-r0bR6XZb3AgiDrc6hOVyRDJhlT3cL8-00ziz4KgVSFU3VOPiHegqpBQf_pUFMgu2A5daOUrgFqpdsXYgfjoCs9dvuXYqcU6Krtx_6VeM18UEoN_aB2gn_QvNrFpyiTkz4ulB1lipYk-18Rw_aMbFOecCGJcZZr3iof5SmF84fTOecU6GM1IdMs8XhM0aNkipwybzL8vVJaWXIK62bEN-LKYWB683xfi5-f7x_vvlYP3798u7t9qGzbqqWCBnHCqeSHdmioFBrndh7t1LWTpqlrQDl0rh_bBqFr9N4psLYhO6nSgb4W7y97TzmVDLyYo2dLIWDcAplm1B3sB12Ew0Voc2LO5Mwp-yPmswFlNsjmYP5CNhtkA2AK5DL57tmiMMLgMkbr-d94t9f9MHRFd3vRUfnvH0_ZsPUb5dnnstfMyf_X6wlwdZlR</recordid><startdate>20040915</startdate><enddate>20040915</enddate><creator>Vidotti, Marcio</creator><creator>Dall’Antonia, Luiz H</creator><creator>Cintra, Elaine P</creator><creator>Córdoba de Torresi, Susana I</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20040915</creationdate><title>Reduction of interference signal of ascorbate and urate in poly(pyrrole)-based ammonia sensors in aqueous solutions</title><author>Vidotti, Marcio ; Dall’Antonia, Luiz H ; Cintra, Elaine P ; Córdoba de Torresi, Susana I</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c440t-12aabab8591472eb853ad4d8cb54b3eb5210faff6842a15239f01cc2ecb052313</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Amonia sensor</topic><topic>Analytical chemistry</topic><topic>Chemistry</topic><topic>Conducting polymers</topic><topic>Exact sciences and technology</topic><topic>General, instrumentation</topic><topic>Interference signal</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Vidotti, Marcio</creatorcontrib><creatorcontrib>Dall’Antonia, Luiz H</creatorcontrib><creatorcontrib>Cintra, Elaine P</creatorcontrib><creatorcontrib>Córdoba de Torresi, Susana I</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Electrochimica acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Vidotti, Marcio</au><au>Dall’Antonia, Luiz H</au><au>Cintra, Elaine P</au><au>Córdoba de Torresi, Susana I</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reduction of interference signal of ascorbate and urate in poly(pyrrole)-based ammonia sensors in aqueous solutions</atitle><jtitle>Electrochimica acta</jtitle><date>2004-09-15</date><risdate>2004</risdate><volume>49</volume><issue>22</issue><spage>3665</spage><epage>3670</epage><pages>3665-3670</pages><issn>0013-4686</issn><eissn>1873-3859</eissn><coden>ELCAAV</coden><abstract>The present paper outlines the methods used to reduce the interference signal caused by ascorbic and uric acids on an ammonia amperometric sensor in aqueous solutions. The sensor was prepared by electrochemical deposition of poly(pyrrole), doped with dodecylbenzenesulfonic anions (DBS), onto platinum substrates. Poly(pyrrole) films were coated with different membranes, aiming to find different ways to diminish the interference response of anionic species such as ascorbate and urate. Nafion
®, cellulose acetate and poly(5-amino-1-naphthol), were studied as permselective layers. This last polymer is electroactive, offering the possibility of its formation by electrochemical deposition onto poly(pyrrole). In order to verify the stability of poly(5-amino-1-naphthol) when used in basic medium, Raman spectra were taken from these modified electrodes. Further, all sensors showed a linear response and a good sensitivity in a concentration range from 0 to 120
μmol
L
−1 which covers the ammonia concentration range typical of clinical samples (18–72
μmol
L
−1).</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.electacta.2003.11.034</doi><tpages>6</tpages></addata></record> |
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source | ScienceDirect Journals |
subjects | Amonia sensor Analytical chemistry Chemistry Conducting polymers Exact sciences and technology General, instrumentation Interference signal |
title | Reduction of interference signal of ascorbate and urate in poly(pyrrole)-based ammonia sensors in aqueous solutions |
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