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dc.contributor.authorTorrades Carné, Francesc
dc.contributor.authorCastellví Morell, Marina
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.identifier.citationTorrades, F.; Castellvi, M. New methodology for checking of absence of systematic errors in the determination of sulphate ion in MgCl2·6H2O. "Fresenius journal of analytical chemistry", 1994, vol. 350, núm. 10-11, p. 582-586.
dc.description.abstractA new methodology is proposed for obtaining analytical results free from bias errors, it is bases on a modification of the standard addition method. Bias or systematic errors are taken as the differences between the amounts of analyte in the test portion and the image of the analytical signal on a calibration relationship where the amounts of added analyte act as the predictors. The constant component of the error, the matrix interactive effect and the direct matrix interference are jointly discussed as the main sources of bias. The latter two are considered to be different forms of interference. As an example, the new methodology was applied to the determination of sulphate ion in a magnesium chloride sample (Merck AR) using a spectrophotometric and an atomic absorption spectrophotometric procedure. No direct matrix interference or interactive matrix effect on the analytical results was found.
dc.format.extent5 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Química analítica
dc.subject.lcshSystem failures (Engineering)
dc.subject.lcshChemical engineering.
dc.titleNew methodology for checking of absence of systematic errors in the determination of sulphate ion in MgCl2·6H2O
dc.subject.lemacErrors de sistemes (Enginyeria)
dc.subject.lemacQuímica analítica -- Metodologia
dc.contributor.groupUniversitat Politècnica de Catalunya. ENMA - Enginyeria del Medi Ambient
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
local.citation.authorTorrades, F.; Castellvi, M.
local.citation.publicationNameFresenius journal of analytical chemistry

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