Utilizing a sequential injection system furnished with an extraction microcolumn as a novel approach for executing sequential extractions of metal species in solid samples
This communication presents a novel approach to perform sequential extraction of elements in solid samples by using a sequential injection (SI) system incorporating a specially designed extraction microcolumn. Based on the operation of the syringe pump, different modes of extraction are potentially...
Saved in:
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Article |
Published: |
2018
|
Subjects: | |
Online Access: | https://repository.li.mahidol.ac.th/handle/123456789/21118 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Mahidol University |
id |
th-mahidol.21118 |
---|---|
record_format |
dspace |
spelling |
th-mahidol.211182018-07-24T10:41:43Z Utilizing a sequential injection system furnished with an extraction microcolumn as a novel approach for executing sequential extractions of metal species in solid samples Roongrat Chomchoei Elo Harald Hansen Juwadee Shiowatana Mahidol University Danmarks Tekniske Universitet Biochemistry, Genetics and Molecular Biology Chemistry Environmental Science This communication presents a novel approach to perform sequential extraction of elements in solid samples by using a sequential injection (SI) system incorporating a specially designed extraction microcolumn. Based on the operation of the syringe pump, different modes of extraction are potentially feasible, uni-directional and bi-directional flow schemes being used herein. A three-step sequential extraction scheme, using conventionally adopted extractants, was used to evaluate the system by determining Ca, Fe, Mn, Cu, Zn in a soil certified reference material (NIST, SRM 2710). It is demonstrated that the system entails many advantages such as being fully automated, and besides being characterised by rapidity, ease of operation and robustness, it is less prone to risks of contamination and personal errors as encountered in traditional batch systems. Moreover, improvement of the precision and accuracy of the chemical fractionation of metal in solids as compared with previous reports are obtained. The system ensures that extraction is performed at designated pH values. Variation of sample weight to column volume ratios do not affect the amounts of extractable metals, nor do extraction flow rates ranging from 50 to 100 μl s-1show any effect on the extractability of the metals studied. With uni-directional and bi-directional flows the extractable amounts of metals are, with the exception of Mn, not different from those obtained in conventional procedures, but the saving in operation time is drastic (a few hours as compared to days). © 2004 Elsevier B.V. All rights reserved. 2018-07-24T03:36:00Z 2018-07-24T03:36:00Z 2004-11-22 Article Analytica Chimica Acta. Vol.526, No.2 (2004), 177-184 10.1016/j.aca.2004.09.043 00032670 2-s2.0-8444234030 https://repository.li.mahidol.ac.th/handle/123456789/21118 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=8444234030&origin=inward |
institution |
Mahidol University |
building |
Mahidol University Library |
continent |
Asia |
country |
Thailand Thailand |
content_provider |
Mahidol University Library |
collection |
Mahidol University Institutional Repository |
topic |
Biochemistry, Genetics and Molecular Biology Chemistry Environmental Science |
spellingShingle |
Biochemistry, Genetics and Molecular Biology Chemistry Environmental Science Roongrat Chomchoei Elo Harald Hansen Juwadee Shiowatana Utilizing a sequential injection system furnished with an extraction microcolumn as a novel approach for executing sequential extractions of metal species in solid samples |
description |
This communication presents a novel approach to perform sequential extraction of elements in solid samples by using a sequential injection (SI) system incorporating a specially designed extraction microcolumn. Based on the operation of the syringe pump, different modes of extraction are potentially feasible, uni-directional and bi-directional flow schemes being used herein. A three-step sequential extraction scheme, using conventionally adopted extractants, was used to evaluate the system by determining Ca, Fe, Mn, Cu, Zn in a soil certified reference material (NIST, SRM 2710). It is demonstrated that the system entails many advantages such as being fully automated, and besides being characterised by rapidity, ease of operation and robustness, it is less prone to risks of contamination and personal errors as encountered in traditional batch systems. Moreover, improvement of the precision and accuracy of the chemical fractionation of metal in solids as compared with previous reports are obtained. The system ensures that extraction is performed at designated pH values. Variation of sample weight to column volume ratios do not affect the amounts of extractable metals, nor do extraction flow rates ranging from 50 to 100 μl s-1show any effect on the extractability of the metals studied. With uni-directional and bi-directional flows the extractable amounts of metals are, with the exception of Mn, not different from those obtained in conventional procedures, but the saving in operation time is drastic (a few hours as compared to days). © 2004 Elsevier B.V. All rights reserved. |
author2 |
Mahidol University |
author_facet |
Mahidol University Roongrat Chomchoei Elo Harald Hansen Juwadee Shiowatana |
format |
Article |
author |
Roongrat Chomchoei Elo Harald Hansen Juwadee Shiowatana |
author_sort |
Roongrat Chomchoei |
title |
Utilizing a sequential injection system furnished with an extraction microcolumn as a novel approach for executing sequential extractions of metal species in solid samples |
title_short |
Utilizing a sequential injection system furnished with an extraction microcolumn as a novel approach for executing sequential extractions of metal species in solid samples |
title_full |
Utilizing a sequential injection system furnished with an extraction microcolumn as a novel approach for executing sequential extractions of metal species in solid samples |
title_fullStr |
Utilizing a sequential injection system furnished with an extraction microcolumn as a novel approach for executing sequential extractions of metal species in solid samples |
title_full_unstemmed |
Utilizing a sequential injection system furnished with an extraction microcolumn as a novel approach for executing sequential extractions of metal species in solid samples |
title_sort |
utilizing a sequential injection system furnished with an extraction microcolumn as a novel approach for executing sequential extractions of metal species in solid samples |
publishDate |
2018 |
url |
https://repository.li.mahidol.ac.th/handle/123456789/21118 |
_version_ |
1763491960008474624 |