The standard addition method revisited

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Authors / Editors

Andersen, Jens

Research Areas

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Publication Details

Author list: Andersen JET

Publisher: Elsevier

Place: OXFORD

Publication year: 2017

Journal acronym: TRAC-TREND ANAL CHEM

Volume number: 89

Start page: 21

End page: 33

Number of pages: 13

ISSN: 0165-9936

eISSN: 1879-3142

Languages: English-Great Britain (EN-GB)

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Abstract

Several flaws of the conventional standard-addition method (SAM) have been unravelled. By revisiting the theory, it has been shown that the SAM cannot be used to correct completely for interferences in analytical chemistry. Therefore, a new theory of SAM was developed, which takes into account the uncertainty of measurement and relates this information to differences that might stem from interferences. The SAM may be used to correct for rotational effects but it cannot be used to correct for translational effects, which confirms earlier findings. A full set of equations were supplied for undertaking a full method validation including a new set of parameters of performance. The equations were tested on determination by UV-VIS spectrophotometry of L-ascorbic acid. Previous results are reviewed and discussed in view of these new findings and recommendations are given about the importance of carrying out full method validations as a prerequisite to the SAM. (C) 2017 Elsevier B.V. All rights reserved.

Keywords

Calibration, Quality assurance, Spectrophotometry, Standard addition method (SAM), theory

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