Repository logo
 
Publication

Sample introduction in multi-syringe flow injection systems: comparison between time-based and volume-based strategies

2005Journal article Restricted access
Simple item page
dc.contributor.authorSegundo, Marcela A.
dc.contributor.authorOliveira, Hugo M.
dc.contributor.authorLima, José L. F. C.
dc.contributor.authorAlmeida, M. Inês G. S.
dc.contributor.authorRangel, António O. S. S.
dc.date.accessioned2010-11-11T18:06:46Z
dc.date.available2010-11-11T18:06:46Z
dc.date.issued2005
dc.description.abstractIn multi-syringe flowinjection analysis (MSFIA), devices as selection, injection or commutation valves must be incorporated to the manifold to provide access to sample and standard solutions. Therefore, the definition of sample amount can be either volume or time-based. In the present work, four configurations for sample introduction (two for each approach) were tested in order to establish if the different strategies affect the analytical signal in MSFIA systems. The mean absorbance value from ten consecutive injections of a bromothymol blue solution obtained for the time-based strategy was lower than that provided by the volume-based approach as the exact volume delivered by each configuration was different from the “theoretical” volume. For time-based configurations, the exact volume delivered is 2–5% lower than the theoretical value while for volume-based configurations, the volume delivered was between 6 and 46% larger than the theoretical volume. Moreover, for time-based sampling, the order of steps in the analytical cycle was of utmost importance since any alteration in the flow direction affected the volume delivered in the subsequent step in the analytical cycle. The influence of the two sampling approaches was also evaluated in the MSFIA systems for the spectrophotometric determination of phenolic compounds and the potentiometric determination of chloride. There was no evidence that the use of either volume or time-based sampling would improve the analytical features of these determinations when real samples were tested.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationSEGUNDO, Marcela A...[et al.] - Sample introduction in multi-syringe flow injection systems: comparison between time-based and volume-based strategies. Analytica Chimica Acta. ISSN 0003-2670. Vol. 537, n.º 1-2 (2005), p. 207–214por
dc.identifier.urihttp://hdl.handle.net/10400.14/3391
dc.language.isoengpor
dc.publisherElsevierpor
dc.subjectMulti-syringepor
dc.subjectFlow injectionpor
dc.subjectSampling strategypor
dc.subjectTime-based samplingpor
dc.subjectVolume-based samplingpor
dc.titleSample introduction in multi-syringe flow injection systems: comparison between time-based and volume-based strategiespor
dc.typejournal article
dspace.entity.typePublication
person.familyNameSegundo
person.familyNameLima
person.familyNameGameiro de Sa Almeida
person.familyNameSantos Silva Rangel
person.givenNameMarcela
person.givenNameJosé
person.givenNameMaria Ines
person.givenNameAntónio Osmaro
person.identifierR-000-8FJ
person.identifier.ciencia-id0A14-B7A6-E805
person.identifier.ciencia-id4811-9AA9-D673
person.identifier.ciencia-idD61D-7CFB-178A
person.identifier.orcid0000-0003-2938-0214
person.identifier.orcid0000-0002-8906-9826
person.identifier.orcid0000-0002-5272-3468
person.identifier.orcid0000-0002-6486-8947
person.identifier.ridA-1009-2010
person.identifier.scopus-author-id6602384941
person.identifier.scopus-author-id10141079100
person.identifier.scopus-author-id7004827387
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication84c05a53-23fa-4f4b-b007-d1a5fc748d5a
relation.isAuthorOfPublication71f20aa3-d4ae-40c3-a9ef-27d88442d1e0
relation.isAuthorOfPublicationa0e0a8f4-578a-4359-a6d2-8626e155ac83
relation.isAuthorOfPublication467be022-fd9c-4549-aa48-48ebcc1098eb
relation.isAuthorOfPublication.latestForDiscovery467be022-fd9c-4549-aa48-48ebcc1098eb

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
1-s2.0-S0003267005000243-main.pdf
Size:
150.46 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
3.44 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ESB - Contribuições em Revistas Científicas / Contribution to Journals