Novel approaches to analysis by flow injection gradient titration

2007
journal article
article
dc.abstract.enTwo novel procedures for flow injection gradient titration with the use of a single stock standard solution are proposed. In the multi-point single-line (MP-SL) method the calibra-tion graph is constructed on the basis of a set of standard solutions, which are generated in a standard reservoir and subsequently injected into the titrant. According to the single-point multi-line (SP-ML) procedure the standard solution and a sample are injected into the titrant stream from four loops of different capacities, hence four calibration graphs are able to be constructed and the analytical result is calculated on the basis of a generalized slope of these graphs. Both approaches have been tested on the example of spectrophotometric acid–base titration of hydrochloric and acetic acids with using bromothymol blue and phe-nolphthalein as indicators, respectively, and sodium hydroxide as a titrant. Under optimized experimental conditions the analytical results of precision less than 1.8 and 2.5% (RSD) and of accuracy less than 3.0 and 5.4% (relative error (RE)) were obtained for MP-SL and SP-ML procedures, respectively, in ranges of 0.0031–0.0631 mol L −1 for samples of hydrochloric acid and of 0.1680–1.7600 mol L − 1 for samples of acetic acid. The feasibility of both methods was illustrated by applying them to the total acidity determination in vinegar samples with precision lower than 0.5 and 2.9% (RSD) for MP-SL and SP-ML procedures, respectively.pl
dc.affiliationWydział Chemii : Zakład Chemii Analitycznejpl
dc.contributor.authorWójtowicz, Marzenapl
dc.contributor.authorKozak, Joanna - 129327 pl
dc.contributor.authorKościelniak, Paweł - 129217 pl
dc.date.accessioned2015-09-01T08:31:03Z
dc.date.available2015-09-01T08:31:03Z
dc.date.issued2007pl
dc.description.number1-2pl
dc.description.physical78-83pl
dc.description.volume600pl
dc.identifier.doi10.1016/j.aca.2007.04.005pl
dc.identifier.eissn1873-4324pl
dc.identifier.issn0003-2670pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/15193
dc.languageengpl
dc.language.containerengpl
dc.rightsDodaję tylko opis bibliograficzny*
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dc.subtypeArticlepl
dc.titleNovel approaches to analysis by flow injection gradient titrationpl
dc.title.journalAnalytica Chimica Actapl
dc.typeJournalArticlepl
dspace.entity.typePublication

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