Sonically assisted electroanalytical detection of ultratrace arsenic.
A simple portable handheld electrochemical sensor with an integrated sound source for the detection of ultratrace quantities of arsenic using square wave anodic stripping voltammetry is described. The sensor uses low-frequency sound (250 Hz) during the arsenic deposition step to enhance the sensitiv...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2004
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| _version_ | 1826300322239217664 |
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| author | Simm, A Banks, C Compton, R |
| author_facet | Simm, A Banks, C Compton, R |
| author_sort | Simm, A |
| collection | OXFORD |
| description | A simple portable handheld electrochemical sensor with an integrated sound source for the detection of ultratrace quantities of arsenic using square wave anodic stripping voltammetry is described. The sensor uses low-frequency sound (250 Hz) during the arsenic deposition step to enhance the sensitivity of the arsenic stripping response. It is found that under quiescent (silent) conditions a detection limit of 2.1 x 10(-7) M with a sensitivity of 0.51 M(-1) A is achievable using a 120-s accumulation period, while applying low-frequency sound using a "sonotrode" reduced this detection limit to 3.7 x 10(-9) M with an increased sensitivity of 27.2 M(-1) A. Thus, the low-frequency sonotrode is shown to increase the sensitivity by ca. 50 times while reducing the limit of detection by 2 orders of magnitude. A study of the effect of copper contamination is carried out as well as analysis in real samples; it is found that although as expected copper detrimentally effects the arsenic limit of detection, it does not rise significantly above 10(-8) M levels. |
| first_indexed | 2024-03-07T05:15:23Z |
| format | Journal article |
| id | oxford-uuid:dcff91a0-4623-42f3-bbeb-00ab3b1cd6e9 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:15:23Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:dcff91a0-4623-42f3-bbeb-00ab3b1cd6e92022-03-27T09:21:50ZSonically assisted electroanalytical detection of ultratrace arsenic.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:dcff91a0-4623-42f3-bbeb-00ab3b1cd6e9EnglishSymplectic Elements at Oxford2004Simm, ABanks, CCompton, RA simple portable handheld electrochemical sensor with an integrated sound source for the detection of ultratrace quantities of arsenic using square wave anodic stripping voltammetry is described. The sensor uses low-frequency sound (250 Hz) during the arsenic deposition step to enhance the sensitivity of the arsenic stripping response. It is found that under quiescent (silent) conditions a detection limit of 2.1 x 10(-7) M with a sensitivity of 0.51 M(-1) A is achievable using a 120-s accumulation period, while applying low-frequency sound using a "sonotrode" reduced this detection limit to 3.7 x 10(-9) M with an increased sensitivity of 27.2 M(-1) A. Thus, the low-frequency sonotrode is shown to increase the sensitivity by ca. 50 times while reducing the limit of detection by 2 orders of magnitude. A study of the effect of copper contamination is carried out as well as analysis in real samples; it is found that although as expected copper detrimentally effects the arsenic limit of detection, it does not rise significantly above 10(-8) M levels. |
| spellingShingle | Simm, A Banks, C Compton, R Sonically assisted electroanalytical detection of ultratrace arsenic. |
| title | Sonically assisted electroanalytical detection of ultratrace arsenic. |
| title_full | Sonically assisted electroanalytical detection of ultratrace arsenic. |
| title_fullStr | Sonically assisted electroanalytical detection of ultratrace arsenic. |
| title_full_unstemmed | Sonically assisted electroanalytical detection of ultratrace arsenic. |
| title_short | Sonically assisted electroanalytical detection of ultratrace arsenic. |
| title_sort | sonically assisted electroanalytical detection of ultratrace arsenic |
| work_keys_str_mv | AT simma sonicallyassistedelectroanalyticaldetectionofultratracearsenic AT banksc sonicallyassistedelectroanalyticaldetectionofultratracearsenic AT comptonr sonicallyassistedelectroanalyticaldetectionofultratracearsenic |