Michałowska-Kaczmarczyk AM, Asuero AG, Martin J, Alonso E, Jurado JM, Michałowski T. A uniform nonlinearity criterion for rational functions applied to calibration curve and standard addition methods.
Talanta 2014;
130:307-14. [PMID:
25159414 DOI:
10.1016/j.talanta.2014.04.067]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 04/22/2014] [Indexed: 11/18/2022]
Abstract
Rational functions of the Padé type are used for the calibration curve (CCM), and standard addition (SAM) methods purposes. In this paper, the related functions were applied to results obtained from the analyses of (a) nickel with use of FAAS method, (b) potassium according to FAES method, and (c) salicylic acid according to HPLC-MS/MS method. A uniform, integral criterion of nonlinearity of the curves, obtained according to CCM and SAM, is suggested. This uniformity is based on normalization of the approximating functions within the frames of a unit area.
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