High sensitivity and specificity simultaneous determination of lead, cadmium and copper using μpAD with dual electrochemical and colorimetric detection
© 2016 Elsevier B.V. All rights reserved. A bismuth-modified electrode can increase the sensitivity of lead and cadmium detection. However, use of a bismuth-modified electrode in the detection of copper remains limited because the bismuth signal overlaps with the signal for copper. In this study, we...
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th-mahidol.405782019-03-14T15:01:26Z High sensitivity and specificity simultaneous determination of lead, cadmium and copper using μpAD with dual electrochemical and colorimetric detection Sudkate Chaiyo Amara Apiluk Weena Siangproh Orawon Chailapakul Chulalongkorn University Mahidol University Srinakharinwirot University Engineering Materials Science © 2016 Elsevier B.V. All rights reserved. A bismuth-modified electrode can increase the sensitivity of lead and cadmium detection. However, use of a bismuth-modified electrode in the detection of copper remains limited because the bismuth signal overlaps with the signal for copper. In this study, we developed a new microfluidic paper-based analytical device (μPAD) coupled with dual electrochemical and colorimetric detection to obtain high sensitivity and specificity for the simultaneous determination of lead, cadmium and copper. The μPAD is divided into two parts. The first part is electrochemical detection for the determination of lead and cadmium using a bismuth-modified, boron-doped diamond electrode (Bi-BDDE). The limit of detection was 0.1 ng mL-1(for both metals). The second part is colorimetric detection for the determination of copper based on the catalytic etching of silver nanoplates (AgNPls) by thiosulfate (S2O32-). The color of AgNPls on μPAD changed from pinkish violet to colorless after the addition of copper; this change can be monitored by naked eyes and its detection limit was5.0 ng mL-1by the Image J analysis. The proposed method was applied for the simultaneous determination of these three metals in real samples and no significant differences in accuracy and precision were observed compared to the standard method. 2018-12-11T02:46:43Z 2019-03-14T08:01:26Z 2018-12-11T02:46:43Z 2019-03-14T08:01:26Z 2016-10-05 Article Sensors and Actuators, B: Chemical. Vol.233, (2016), 540-549 10.1016/j.snb.2016.04.109 09254005 2-s2.0-84964635614 https://repository.li.mahidol.ac.th/handle/123456789/40578 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84964635614&origin=inward |
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Engineering Materials Science Sudkate Chaiyo Amara Apiluk Weena Siangproh Orawon Chailapakul High sensitivity and specificity simultaneous determination of lead, cadmium and copper using μpAD with dual electrochemical and colorimetric detection |
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© 2016 Elsevier B.V. All rights reserved. A bismuth-modified electrode can increase the sensitivity of lead and cadmium detection. However, use of a bismuth-modified electrode in the detection of copper remains limited because the bismuth signal overlaps with the signal for copper. In this study, we developed a new microfluidic paper-based analytical device (μPAD) coupled with dual electrochemical and colorimetric detection to obtain high sensitivity and specificity for the simultaneous determination of lead, cadmium and copper. The μPAD is divided into two parts. The first part is electrochemical detection for the determination of lead and cadmium using a bismuth-modified, boron-doped diamond electrode (Bi-BDDE). The limit of detection was 0.1 ng mL-1(for both metals). The second part is colorimetric detection for the determination of copper based on the catalytic etching of silver nanoplates (AgNPls) by thiosulfate (S2O32-). The color of AgNPls on μPAD changed from pinkish violet to colorless after the addition of copper; this change can be monitored by naked eyes and its detection limit was5.0 ng mL-1by the Image J analysis. The proposed method was applied for the simultaneous determination of these three metals in real samples and no significant differences in accuracy and precision were observed compared to the standard method. |
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Chulalongkorn University |
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Chulalongkorn University Sudkate Chaiyo Amara Apiluk Weena Siangproh Orawon Chailapakul |
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Sudkate Chaiyo Amara Apiluk Weena Siangproh Orawon Chailapakul |
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title |
High sensitivity and specificity simultaneous determination of lead, cadmium and copper using μpAD with dual electrochemical and colorimetric detection |
title_short |
High sensitivity and specificity simultaneous determination of lead, cadmium and copper using μpAD with dual electrochemical and colorimetric detection |
title_full |
High sensitivity and specificity simultaneous determination of lead, cadmium and copper using μpAD with dual electrochemical and colorimetric detection |
title_fullStr |
High sensitivity and specificity simultaneous determination of lead, cadmium and copper using μpAD with dual electrochemical and colorimetric detection |
title_full_unstemmed |
High sensitivity and specificity simultaneous determination of lead, cadmium and copper using μpAD with dual electrochemical and colorimetric detection |
title_sort |
high sensitivity and specificity simultaneous determination of lead, cadmium and copper using μpad with dual electrochemical and colorimetric detection |
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2018 |
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https://repository.li.mahidol.ac.th/handle/123456789/40578 |
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1763489484929761280 |