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Penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya

Hanging mercury dropping electrode (HMDE), carbon paste electrode (CPE), screenprinted carbon electrode combined with Ag/AgCl (SPCE Ag/AgCl), and screenprinted carbon electrode combined with Ag/AgCl and Ag (SPCE Ag/AgCl & Ag) have been applied as working electrodes in determination of amaranth,...

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Main Author: Sarikawi, Siti Hadijah
Format: Thesis
Language:English
Published: 2008
Subjects:
QD Chemistry
Online Access:http://eprints.utm.my/id/eprint/18086/1/SitiHadijahSarikawiMFS2008.pdf
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spelling my.utm.180862018-07-25T08:01:21Z http://eprints.utm.my/id/eprint/18086/ Penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya Sarikawi, Siti Hadijah QD Chemistry Hanging mercury dropping electrode (HMDE), carbon paste electrode (CPE), screenprinted carbon electrode combined with Ag/AgCl (SPCE Ag/AgCl), and screenprinted carbon electrode combined with Ag/AgCl and Ag (SPCE Ag/AgCl & Ag) have been applied as working electrodes in determination of amaranth, tartrazine and both dyes mixture. Cyclic voltammetry (CV) studies showed that amaranth, tartrazine and the mixture of both dyes were able to reduce at the surface of HMDE, CPE, SPCE Ag/AgCl and SPCE Ag/AgCl & Ag in acidic pH medium. Parameters optimization using differential pulse voltammetry (DPV) technique showed that the pH of supporting electrolyte, accumulation time, scanning and stirring rate affected the current value (Ip) of the dyes reduction peak produced via these electrodes. Application of SPCE Ag/AgCl with DPV technique in Britton-Robinson (BR) buffer pH 2.31 at non-aerated condition was able to detect reduction peak of amaranth and tartrazine. Chemical pre-treatment of SPCE Ag/AgCl & Ag with 1 M NaHCO3 solution has succeeded producing low limit of detection (LOD) as small as 10-8 M. The usage of HMDE for determination of amaranth, tartrazine and both dyes mixture produced LOD 3.2 x 10-9 M - 11.6 x 10-9 M. The usage of CPE for determination of amaranth, tartrazine and both dyes mixture produced bigger LOD which is 7.5 x 10-9 M - 3 x 10-8 M. The usage of SPCE Ag/AgCl for determination of amaranth and tartrazine in cell produced LOD 7.7 x 10-7 M and 8.1 x 10-7 M respectively. The usage of SPCE Ag/AgCl in beaker produced LOD 10.2 x 10-7 M for amaranth and 7.4 x 10-7 M for tartrazine. The usage of SPCE Ag/AgCl & Ag for determination of amaranth, tartrazine and both dyes mixture produced LOD 1.6 x 10-8 M - 11 x 10-8 M. The repeatability of these electrodes in producing consistent reduction peak current for the dyes is as follows: HMDE > CPE > SPCE Ag/AgCl & Ag > SPCE Ag/AgCl 2008-07 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/18086/1/SitiHadijahSarikawiMFS2008.pdf Sarikawi, Siti Hadijah (2008) Penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya. Masters thesis, Universiti Teknologi Malaysia, Faculty of Science. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85227?queryType=vitalDismax&query=Penggunaan+teknik+voltammetri+bagi+penentuan+pewarna+amaranth%2C+tartrazina+dan+campuran+kedua-duanya&public=true
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic QD Chemistry
spellingShingle QD Chemistry
Sarikawi, Siti Hadijah
Penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya
description Hanging mercury dropping electrode (HMDE), carbon paste electrode (CPE), screenprinted carbon electrode combined with Ag/AgCl (SPCE Ag/AgCl), and screenprinted carbon electrode combined with Ag/AgCl and Ag (SPCE Ag/AgCl & Ag) have been applied as working electrodes in determination of amaranth, tartrazine and both dyes mixture. Cyclic voltammetry (CV) studies showed that amaranth, tartrazine and the mixture of both dyes were able to reduce at the surface of HMDE, CPE, SPCE Ag/AgCl and SPCE Ag/AgCl & Ag in acidic pH medium. Parameters optimization using differential pulse voltammetry (DPV) technique showed that the pH of supporting electrolyte, accumulation time, scanning and stirring rate affected the current value (Ip) of the dyes reduction peak produced via these electrodes. Application of SPCE Ag/AgCl with DPV technique in Britton-Robinson (BR) buffer pH 2.31 at non-aerated condition was able to detect reduction peak of amaranth and tartrazine. Chemical pre-treatment of SPCE Ag/AgCl & Ag with 1 M NaHCO3 solution has succeeded producing low limit of detection (LOD) as small as 10-8 M. The usage of HMDE for determination of amaranth, tartrazine and both dyes mixture produced LOD 3.2 x 10-9 M - 11.6 x 10-9 M. The usage of CPE for determination of amaranth, tartrazine and both dyes mixture produced bigger LOD which is 7.5 x 10-9 M - 3 x 10-8 M. The usage of SPCE Ag/AgCl for determination of amaranth and tartrazine in cell produced LOD 7.7 x 10-7 M and 8.1 x 10-7 M respectively. The usage of SPCE Ag/AgCl in beaker produced LOD 10.2 x 10-7 M for amaranth and 7.4 x 10-7 M for tartrazine. The usage of SPCE Ag/AgCl & Ag for determination of amaranth, tartrazine and both dyes mixture produced LOD 1.6 x 10-8 M - 11 x 10-8 M. The repeatability of these electrodes in producing consistent reduction peak current for the dyes is as follows: HMDE > CPE > SPCE Ag/AgCl & Ag > SPCE Ag/AgCl
format Thesis
author Sarikawi, Siti Hadijah
author_facet Sarikawi, Siti Hadijah
author_sort Sarikawi, Siti Hadijah
title Penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya
title_short Penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya
title_full Penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya
title_fullStr Penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya
title_full_unstemmed Penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya
title_sort penggunaan teknik voltammetri bagi penentuan pewarna amaranth, tartrazina dan campuran kedua-duanya
publishDate 2008
url http://eprints.utm.my/id/eprint/18086/1/SitiHadijahSarikawiMFS2008.pdf
http://eprints.utm.my/id/eprint/18086/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:85227?queryType=vitalDismax&query=Penggunaan+teknik+voltammetri+bagi+penentuan+pewarna+amaranth%2C+tartrazina+dan+campuran+kedua-duanya&public=true
_version_ 1643646796291899392
score 13.211869

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