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Novel approaches to analysis by flow injection gradient titration

Novel approaches to analysis by flow injection ...

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dc.contributor.author Wójtowicz, Marzena pl
dc.contributor.author Kozak, Joanna [SAP11015410] pl
dc.contributor.author Kościelniak, Paweł [SAP11010982] pl
dc.date.accessioned 2015-09-01T08:31:03Z
dc.date.available 2015-09-01T08:31:03Z
dc.date.issued 2007 pl
dc.identifier.issn 0003-2670 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/15193
dc.language eng pl
dc.title Novel approaches to analysis by flow injection gradient titration pl
dc.type JournalArticle pl
dc.description.physical 78-83 pl
dc.abstract.en Two 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.description.volume 600 pl
dc.description.number 1-2 pl
dc.identifier.doi 10.1016/j.aca.2007.04.005 pl
dc.identifier.eissn 1873-4324 pl
dc.title.journal Analytica Chimica Acta pl
dc.language.container eng pl
dc.affiliation Wydział Chemii : Zakład Chemii Analitycznej pl
dc.subtype Article pl

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