Error propagation and figures of merit for quantification by solving matrix equations

Lorber, Avraham

doi:10.1021/ac00297a042

Cited by 468 publications

(387 citation statements)

References 20 publications

Supporting

Mentioning

367

Contrasting

Unclassified

Order By: Relevance

“…44,[45][46][47][48] In this investigation, the LOD and LOQ have been calculated from the univariate definitions as described by Garcia et al 49 and Ketterer et al 50 For each individual component, four standard mixtures were prepared so that the concentration of the analyte was kept constant at a low level close to the LOQ, and that of other components was varied. The concentration of the analyte in the mixtures was estimated by the TABLE 4 -The calculated LOD and LOQ (in µg ml -1 ).…”

Section: Lod and Loq Of The Methodsmentioning

confidence: 99%

Simultaneous Determination of Phenol and Mononitrophenol Isomers Using PLS Regression and Conventional and Derivative Spectrophotometry

et al. 2005

View full text Add to dashboard Cite

Summary -The partial least squares regression method (PLS) was tested as a calibration procedure for the simultaneous determination of phenol, o-nitrophenol, m-nitrophenol and p-nitrophenol by both conventional and first derivative UV/Vis spectrophotometry. The experiments were conducted in the acidic, neutral and basic media. The results obtained by the application of the PLS procedure on the conventional and first derivative spectra in two solvent media were compared. It was found that the results obtained in the basic medium have better performance characteristics than those obtained in the acidic or neutral media. Comparable results were obtained in the case of both conventional and first derivative absorbance data. The proposed method was applied to the determination of the four phenol derivatives in natural spiked water samples at concentration levels between 1.0 and 10.0 µg ml -1 with average recoveries in the range 96% -99%.

show abstract

Section: Lod and Loq Of The Methodsmentioning

confidence: 99%

Simultaneous Determination of Phenol and Mononitrophenol Isomers Using PLS Regression and Conventional and Derivative Spectrophotometry

et al. 2005

View full text Add to dashboard Cite

show abstract

“…The slope of the calibration graph is in this 905 case a convenient measure of the sensitivity [83]. For first-order multivariate 906 calibration, this definition has been generalized employing an intuitive analogy between 907 instrumental signal and a so-called net analyte signal (NAS) [86]. The NAS is defined 908 as the portion of the overall signal which can be uniquely ascribed to the analyte [86,87] 909 and is completely general and applicable to all first-order calibration methods, including 910 the popular partial least-squares (PLS) algorithm [87].…”

Section: Multi-way Analytical Figures Of Merit 888mentioning

confidence: 99%

“…For first-order multivariate 906 calibration, this definition has been generalized employing an intuitive analogy between 907 instrumental signal and a so-called net analyte signal (NAS) [86]. The NAS is defined 908 as the portion of the overall signal which can be uniquely ascribed to the analyte [86,87] 909 and is completely general and applicable to all first-order calibration methods, including 910 the popular partial least-squares (PLS) algorithm [87]. Mathematically, the NAS for a 911 given analyte is defined as the projection of the sample signal orthogonal to the space 912 spanned by the interferent agents (Fig.…”

Section: Multi-way Analytical Figures Of Merit 888mentioning

confidence: 99%

Second- and higher-order data generation and calibration: A tutorial

Escandar

Goicoechea

Peña

et al. 2014

Analytica Chimica Acta

158

View full text Add to dashboard Cite

“…[16][17][18] Net analyte signal calibration for a multivariate problem was originally described by Lorber. [19][20][21][22][23][24][25] Based on Lorber's definition the net analyte signal for any analyte based on spectroscopic methods is that part of the spectrum of the analyte that is orthogonal to the space spanned by the spectra of all constituents except the analyte, i.e., all interfering constituents (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

“…1). 19 The NAS calculations are used both for estimation of the figures of merit of an analytical method and its performance including limit of detection, sensitivity and selectivity for each component 26 and for the construction of multivariate calibration models. [20][21][22][23][24][25][26] There are some reports on voltammetric determination of lead and tin by chemometrics methods 12,[27][28][29] and in this paper we develop a simple and new chemometrics method based on differential pulse polarography for simultaneous determination of Sn 2+ and Pb 2+ .…”

Section: Introductionmentioning

confidence: 99%

Application of Net Analyte Signal Standard Addition Method (NASSAM) for Simultaneous Determination of Lead and Tin by Differential Pulse Polarography

Asadpour‐Zeynali

Majidi

Vallipour

et al. 2011

J Chinese Chemical Soc

View full text Add to dashboard Cite

Differential pulse polarography was used for simultaneous determination of Sn 2+ and Pb 2+ . But there is a problem for simultaneous determination and it is high overlapped DPPs of mentioned cations that their determination is impossible in the presence of each other, so multivariate calibration methods as chemomatrics methods were used for this determination. There are some disadvantageous for multivariate calibration methods that can be solved by a new and simple method called net analyte signal standard addition method. This method has some advantages, such as: the use of a full voltammogram, realization in a single step, therefore it does not require calibration and prediction steps and only a few measurements are required for the determination.Keywords: Net analyte signal standard addition method; Simultaneous determination; Differential pulse polarography; Lead; Tin. INTRODUCTIONThe impact of the effects of trace chemical species in the environmental and industrial samples on man's health has fostered development of analytical techniques and instrumentation capable of addressing these issues. 1,2 Different analytical methods were used for simultaneous determination of trace metals like atomic absorption spectrometry, 3,4 high performance liquid chromatography, 5 inductively coupled plasma-mass spectrometry 6 and neutron activation analysis 7 and electrochemical methods. 1,2 Between these methods, one of the reliable, accurate methods that gives qualitative and quantitative information of electroactive species in a sample as a well-known analytical tools with high sensivity and selectivity, coupled with convenience and economy are required. Differential pulse polarography (DPP) has been recognized as a powerful tool for multiel-ement trace metal detection. 2,8,9 In spite of it's high sensivity, this method drawback is the low selectivity. This problem is considerable when our purpose is simultaneous determination of metals and their oxidation and/or reduction potentials are close to each other so there are sever overlapped peaks. In these cases chemomatrics methods are used for analysis of voltamograms and polarograms.

show abstract

Error propagation and figures of merit for quantification by solving matrix equations

Cited by 468 publications

References 20 publications

Simultaneous Determination of Phenol and Mononitrophenol Isomers Using PLS Regression and Conventional and Derivative Spectrophotometry

Simultaneous Determination of Phenol and Mononitrophenol Isomers Using PLS Regression and Conventional and Derivative Spectrophotometry

Second- and higher-order data generation and calibration: A tutorial

Application of Net Analyte Signal Standard Addition Method (NASSAM) for Simultaneous Determination of Lead and Tin by Differential Pulse Polarography

Contact Info

Product

Resources

About