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UBC Theses and Dissertations
Arsenic speciation in algae Lai, Vivian Wai-Man
Abstract
Arsenic speciation in a variety of commercial algal products and a brown alga, Fucus gardneri, collected in Vancouver, B.C., was carried out by using high performance liquid chromatography-inductively coupled plasma-mass spectrometry (HPLC-ICP-MS)and hydride generation atomic absorption spectrometry (HGAAS). Water-soluble organoarsenic compounds present in commercially available food products made from red algae, brown algae and blue-green algae were analyzed by using HPLC-ICP-MS. By the application of two HPLC columns and two mobile phase conditions, arsenosugars (arsenoribofuranosides) in a variety of algae were identified by comparing the retention times with the organoarsenic compounds previously identified in an oyster tissue standard reference material, NIST 1566a. A commercial brown algal product, kelp powder, was found to contain four different arsenosugars. This product may have potential as a "standard reference material" for identification purposes. A terrestrial blue-green alga, Nostoc commune var flagelliforme, was also analyzed and found to contain an arsenosugar, a compound which was previously known only in marine organisms. The total arsenic content as well as the amounts of water-soluble arsenic compounds in all commercial products were determined by using a continuous flow HGAAS system. Commercial marine algae were found to contain high amounts of total arsenic, from 7.6 μg g⁻¹ to 49.3 μg g⁻¹. The terrestrial product was found to contain only 2.7 μg g⁻¹ of total arsenic.
Item Metadata
Title |
Arsenic speciation in algae
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1996
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Description |
Arsenic speciation in a variety of commercial algal products and a brown alga,
Fucus gardneri, collected in Vancouver, B.C., was carried out by using high performance liquid chromatography-inductively coupled plasma-mass spectrometry (HPLC-ICP-MS)and hydride generation atomic absorption spectrometry (HGAAS).
Water-soluble organoarsenic compounds present in commercially available food
products made from red algae, brown algae and blue-green algae were analyzed by using
HPLC-ICP-MS. By the application of two HPLC columns and two mobile phase conditions, arsenosugars (arsenoribofuranosides) in a variety of algae were identified by
comparing the retention times with the organoarsenic compounds previously identified in an oyster tissue standard reference material, NIST 1566a. A commercial brown algal product, kelp powder, was found to contain four different arsenosugars. This product may have potential as a "standard reference material" for identification purposes. A terrestrial blue-green alga, Nostoc commune var flagelliforme, was also analyzed and found to contain an arsenosugar, a compound which was previously known only in marine organisms. The total arsenic content as well as the amounts of water-soluble arsenic compounds in all commercial products were determined by using a continuous flow HGAAS system. Commercial marine algae were found to contain high amounts of total arsenic, from 7.6 μg g⁻¹ to 49.3 μg g⁻¹. The terrestrial product was found to contain only 2.7 μg g⁻¹ of total arsenic.
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Extent |
3339029 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-02-17
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0059536
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1996-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.