Precision and stability in the generalized standard addition method

Kalivas, John H.

doi:10.1021/ac00254a033

Cited by 41 publications

(15 citation statements)

References 15 publications

(22 reference statements)

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“…In this work, we proposed a novel baseline-correction method referred to as peak-to-derivative baseline measurement for derivative spectral analysis. As is well known, the standard addition method (SAM) was one of the effective approaches [42][43][44][45][46] in reducing matrix effects. The derivative SAM spectra provided the information of overlapping bands of the analyte and the interference, and made it easy to identify two crossing points in the derivative spectra.…”

Section: Instructionmentioning

confidence: 99%

A novel baseline-correction method for standard addition based derivative spectra and its application to quantitative analysis of benzo(a)pyrene in vegetable oil samples

Zou

et al. 2011

Analyst

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In the present work, a baseline-correction method based on peak-to-derivative baseline measurement was proposed for the elimination of complex matrix interference that was mainly caused by unknown components and/or background in the analysis of derivative spectra. This novel method was applicable particularly when the matrix interfering components showed a broad spectral band, which was common in practical analysis. The derivative baseline was established by connecting two crossing points of the spectral curves obtained with a standard addition method (SAM). The applicability and reliability of the proposed method was demonstrated through both theoretical simulation and practical application. Firstly, Gaussian bands were used to simulate 'interfering' and 'analyte' bands to investigate the effect of different parameters of interfering band on the derivative baseline. This simulation analysis verified that the accuracy of the proposed method was remarkably better than other conventional methods such as peak-to-zero, tangent, and peak-to-peak measurements. Then the above proposed baseline-correction method was applied to the determination of benzo(a)pyrene (BaP) in vegetable oil samples by second-derivative synchronous fluorescence spectroscopy. The satisfactory results were obtained by using this new method to analyze a certified reference material (coconut oil, BCR(®)-458) with a relative error of -3.2% from the certified BaP concentration. Potentially, the proposed method can be applied to various types of derivative spectra in different fields such as UV-visible absorption spectroscopy, fluorescence spectroscopy and infrared spectroscopy.

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Section: Instructionmentioning

confidence: 99%

A novel baseline-correction method for standard addition based derivative spectra and its application to quantitative analysis of benzo(a)pyrene in vegetable oil samples

Zou

et al. 2011

Analyst

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“…O simplex sequencial, descrito por Deming e Morgan 56 , representa um método de otimização muito mais eficiente para uma superfície de resposta multifatorial, mas não funciona para AMS na presença de interferências espectrais e de efeitos de matriz. Uma alternativa sugerida por Kalivas 55 para determinar os parâmetros ótimos para uma análise, na presença dessas interferências, é o estudo da propagação do erro usando dados obtidos pelo método generalizado de adição padrão 14,57,58 . Quando interferências espectrais e de matriz estão presentes numa análise multicomponente os erros podem ser amplificados, aumentando a incerteza das estimativas das concentrações de interesse.…”

Section: Métodos De Otimização Em Ams-eamunclassified

Análise multicomponente simultânea por espectrofotometria de absorção molecular UV-VIS

Saldanha¹,

Araújo²,

Neto³

1999

Quím. Nova

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Federal de Pernambuco -50739-907 -Recife -PE Recebido em 21/9/98; aceito em 18/2/99 SIMULTANEOUS MULTICOMPONENT ANALYSIS BY UV-VIS SPECTROPHOTOMETRY. This review presents the evolution of simultaneous multicomponent analysis by absorption spectrophotometry in the ultraviolet and visual regions in terms of some qualitative and quantitative analysis techniques, otimization methods, as well as applications and modern trends.

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“…As early as 1979, Kowalski and coworkers had already proposed a multivariate extension of the univariate standard addition method [8][9][10] . It was called generalised standard addition method (GSAM) and was successfully applied to data obtained by UV-vis spectrophotometry 11 , inductively coupled plasma spectroscopy 12,13 and anodic stripping voltammetry 14 .…”

Section: Introductionmentioning

confidence: 99%

“…As early as 1979, Kowalski and co-workers had already proposed a multivariate extension of the univariate standard addition method. − It was called generalized standard addition method (GSAM) and was successfully applied to data obtained by UV–vis spectrophotometry, inductively coupled plasma spectroscopy, , and anodic stripping voltammetry . GSAM method applies classical least-squares calibration (CLS) to a “signal increase” matrix obtained by subtracting the spectra of the sample from the matrix containing all of the spectra measured after successive additions of standards.…”

mentioning

confidence: 99%

New Approach to Multivariate Standard Addition Based on Multivariate Curve Resolution by Alternating Least-Squares: Application to Voltammetric Data

et al. 2020

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A multivariate version of the classical univariate standard addition method is proposed for the analysis of samples generating overlapping signals in the presence of notorious matrix effects.Unlike previous versions based on multivariate calibration by partial least squares (PLS), the proposed strategy takes advantage of a self-modelling methodology: multivariate curve resolution by alternating least squares (MCR-ALS) enhanced with signal shape constraints based on parametric functions. In this way, there is no need for the full multivariate response of a blank solution and, in multianalyte determinations, the standard additions can be made with a solution containing all the analytes, which constitutes a clear advance as compared to PLS approach. The proposed method has been successfully tested in the voltammetric determination of hydroquinone and catechol in solutions of increasing complexity and appears to be a promising tool in the field of electroanalysis.

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Precision and stability in the generalized standard addition method

Cited by 41 publications

References 15 publications

A novel baseline-correction method for standard addition based derivative spectra and its application to quantitative analysis of benzo(a)pyrene in vegetable oil samples

A novel baseline-correction method for standard addition based derivative spectra and its application to quantitative analysis of benzo(a)pyrene in vegetable oil samples

Análise multicomponente simultânea por espectrofotometria de absorção molecular UV-VIS

New Approach to Multivariate Standard Addition Based on Multivariate Curve Resolution by Alternating Least-Squares: Application to Voltammetric Data

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