Preparation of an economic home-made Ag/AgCl electrode from silver recovered from laboratory wastes

© 2016, Chiang Mai University. All rights reserved. In this work, a Ag/AgCl electrode was prepared from silver obtained from recovery of laboratory waste via the cementation technique. The extracted silver metal has purity of 89.4-97.0%, as examined by the Volhard’s titration. Silver was melted, pou...

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Main Authors: Miki Kanna, Sarawut Somnam, Jaroon Jakmunee
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/55186
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spelling th-cmuir.6653943832-551862018-09-05T03:13:42Z Preparation of an economic home-made Ag/AgCl electrode from silver recovered from laboratory wastes Miki Kanna Sarawut Somnam Jaroon Jakmunee Biochemistry, Genetics and Molecular Biology Chemistry Materials Science Mathematics Physics and Astronomy © 2016, Chiang Mai University. All rights reserved. In this work, a Ag/AgCl electrode was prepared from silver obtained from recovery of laboratory waste via the cementation technique. The extracted silver metal has purity of 89.4-97.0%, as examined by the Volhard’s titration. Silver was melted, poured into a cast, and elongated to be a silver wire with the size of 1 mm o.d. and length of 1.33 m. The wire was then used to prepare Ag/AgCl electrode by immerging it into a solution of FeCl3⋅6H2O to form a AgCl film on the silver wire. This electrode was used as a working electrode for chloride determination or further fabricated as a reference electrode. For reference electrode preparation, the Ag/AgCl electrode was immersed in a saturated solution of KNO3contained in a glass tube plugging with agar at one end to act as a salt bridge. The working and reference electrodes were tested for potentiometric determination of chloride. Electrical potential was plotted versus logarithm of chloride concentration to obtain two linear calibration graphs, 5-20 ppm and 20-60 ppm, with the linear equation of y = 0.0018x - 0.0347 and y = 0.0006x - 0.0121, respectively. Moreover, the precision (%RSD) examined with 1 and 20 ppm of chloride solution was 0.9% and 2.7% (n=11), respectively. The prepared electrodes were used for determination of chloride in real samples comparing the results by t-test to those determined by the precipitation titration method. It was found that both methods have no significant difference at 95% confidence level. 2018-09-05T02:52:51Z 2018-09-05T02:52:51Z 2016-07-01 Journal 01252526 2-s2.0-84978634530 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84978634530&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/55186
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
spellingShingle Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
Miki Kanna
Sarawut Somnam
Jaroon Jakmunee
Preparation of an economic home-made Ag/AgCl electrode from silver recovered from laboratory wastes
description © 2016, Chiang Mai University. All rights reserved. In this work, a Ag/AgCl electrode was prepared from silver obtained from recovery of laboratory waste via the cementation technique. The extracted silver metal has purity of 89.4-97.0%, as examined by the Volhard’s titration. Silver was melted, poured into a cast, and elongated to be a silver wire with the size of 1 mm o.d. and length of 1.33 m. The wire was then used to prepare Ag/AgCl electrode by immerging it into a solution of FeCl3⋅6H2O to form a AgCl film on the silver wire. This electrode was used as a working electrode for chloride determination or further fabricated as a reference electrode. For reference electrode preparation, the Ag/AgCl electrode was immersed in a saturated solution of KNO3contained in a glass tube plugging with agar at one end to act as a salt bridge. The working and reference electrodes were tested for potentiometric determination of chloride. Electrical potential was plotted versus logarithm of chloride concentration to obtain two linear calibration graphs, 5-20 ppm and 20-60 ppm, with the linear equation of y = 0.0018x - 0.0347 and y = 0.0006x - 0.0121, respectively. Moreover, the precision (%RSD) examined with 1 and 20 ppm of chloride solution was 0.9% and 2.7% (n=11), respectively. The prepared electrodes were used for determination of chloride in real samples comparing the results by t-test to those determined by the precipitation titration method. It was found that both methods have no significant difference at 95% confidence level.
format Journal
author Miki Kanna
Sarawut Somnam
Jaroon Jakmunee
author_facet Miki Kanna
Sarawut Somnam
Jaroon Jakmunee
author_sort Miki Kanna
title Preparation of an economic home-made Ag/AgCl electrode from silver recovered from laboratory wastes
title_short Preparation of an economic home-made Ag/AgCl electrode from silver recovered from laboratory wastes
title_full Preparation of an economic home-made Ag/AgCl electrode from silver recovered from laboratory wastes
title_fullStr Preparation of an economic home-made Ag/AgCl electrode from silver recovered from laboratory wastes
title_full_unstemmed Preparation of an economic home-made Ag/AgCl electrode from silver recovered from laboratory wastes
title_sort preparation of an economic home-made ag/agcl electrode from silver recovered from laboratory wastes
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84978634530&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/55186
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