Publication
Determination of sulfate in natural and residual waters by turbidimetric flow-injection analysis
| dc.contributor.author | Morais, Inês P.A. | |
| dc.contributor.author | Rangel, António O.S.S. | |
| dc.contributor.author | Souto, M. Renata S. | |
| dc.date.accessioned | 2011-10-22T23:03:11Z | |
| dc.date.available | 2011-10-22T23:03:11Z | |
| dc.date.issued | 2001 | |
| dc.description.abstract | A turbidimetric flow-injection system was developed for the determination of sulfate in natural and residual water samples, with no previous treatment, using spectrophotometric detection. The precipitating agent, 7.0% (w/v) barium chloride solution prepared in 0.10% (w/v) polyvinyl alcohol, was added by using the merging-zones approach. A 100 mg/L sulfate solution in 0.07M nitric acid was mixed with the sample before it entered the injection loop to improve the detection limit, provide in-line pH adjustment, and prevent the interference of some anionic species. The relative standard deviations of the results were between 1.4 and 3.0% and were in agreement with results obtained by the reference method. Samples within a linear concentration range of 10–120 mg SO42−/L can be analyzed at a rate of 40/h. The detection limit is 5 mg SO42−/L. | por |
| dc.description.version | info:eu-repo/semantics/publishedVersion | |
| dc.identifier.citation | MORAIS, Inês P.A. ; RANGEL, António O.S.S. ; SOUTO, M. Renata S. - Determination of Sulfate in Natural and Residual Waters by Turbidimetric Flow-Injection Analysis. Journal of AOAC International. ISSN 1060-3271. Vol. 84, n.º 1 (2001), p. 59-64 | por |
| dc.identifier.doi | 10.1093/jaoac/84.1.59 | |
| dc.identifier.uri | http://hdl.handle.net/10400.14/6903 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | AOAC (Association of Official Agricultural Chemists) International | por |
| dc.title | Determination of sulfate in natural and residual waters by turbidimetric flow-injection analysis | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| person.familyName | Santos Silva Rangel | |
| person.givenName | António Osmaro | |
| person.identifier.ciencia-id | D61D-7CFB-178A | |
| person.identifier.orcid | 0000-0002-6486-8947 | |
| person.identifier.scopus-author-id | 7004827387 | |
| rcaap.rights | restrictedAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 467be022-fd9c-4549-aa48-48ebcc1098eb | |
| relation.isAuthorOfPublication.latestForDiscovery | 467be022-fd9c-4549-aa48-48ebcc1098eb |