Uncertainty of measurement in spectrometric analysis: A case study

Dobilienė, Justina; Raudienė, Edita; Žilinskas, R.P.

doi:10.1016/j.measurement.2009.07.003

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…Limit of detection (LOD) and limit of quantification (LOQ) are two important performance characteristics in method validation. LOD and LOQ are terms used to describe the smallest concentration of an analyte that can be reliably measured by an analytical procedure [23][24]. LOD and LOQ of the analysis methamphetamine using FTIR method were found to be 2.3035% and 7.6786%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Validation of Analytical Methods for Determination of Methamphetamine Using Fourier Transform Infrared (FTIR) Spectroscopy

Riyanto¹,

Nas²

2016

IOSR

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Section: Resultsmentioning

confidence: 99%

Validation of Analytical Methods for Determination of Methamphetamine Using Fourier Transform Infrared (FTIR) Spectroscopy

Riyanto¹,

Nas²

2016

IOSR

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“…Dobiliene et al, 2010 [138] Uncertainty in modern spectrophotometers: An up-to-date view of UV-vis molecular absorption instruments and measurements. Galbán et al, 2007 [139] Overview of the most important uncertainty sources that affect analytical UV-Vis spectrophotometric measurements.…”

Section: Potentiometry: Ion Selective Electrodementioning

confidence: 99%

A Practical Way to ISO/GUM Measurement Uncertainty for Analytical Assays Including In-House Validation Data

González¹,

Herrador²,

GarcíaAsuero³

et al. 2018

Quality Control in Laboratory

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In this contribution, we outline the estimation of measurement uncertainty of analytical assays in a practical way, according to the so-called reconciliation paradigm, by considering the heritance of uncertainties according to the ISO Guide to the expression of uncertainty in measurement (ISO/GUM) approach and the accuracy (bias and precision) study coming from the in-house method validation. A cause and effect analysis is performed by using the Ishikawa diagram or fishbone plot, consisting of a hierarchical structure reaching a final outcome that is the analytical result. The procedure is illustrated with a case study. This procedure may be very suitable for processing data in accreditation of routine assays.

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“…Thus, most published uncertainty considerations focus on the impact of sample-related contributions to the uncertainty budget, whereas the impact of the instrumentation is believed to be of minor significance and is therefore not considered. 4,5 However, in order to obtain accurate and reliable data, a comprehensive analysis not only of the sample under test but also of the spectrophotometer itself as well as the measurement procedure is required. The ASTM standard "Estimating Uncertainty of Test Results Derived from Spectrophotometry," 6 subdivided into instrument, operator, and uniformity uncertainty contributions, can be regarded as a guideline for such an analysis.…”

Section: Introductionmentioning

confidence: 99%

Instrumentation-related uncertainty of reflectance and transmittance measurements with a two-channel spectrophotometer

Peest

Schinke

Brendel

et al. 2017

Review of Scientific Instruments

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Spectrophotometers are operated in numerous fields of science and industry for a variety of applications. In order to provide confidence for the measured data, analyzing the associated uncertainty is valuable. However, the uncertainty of the measurement results is often unknown or reduced to sample-related contributions. In this paper, we describe our approach for the systematic determination of the measurement uncertainty of the commercially available two-channel spectrophotometer Agilent Cary 5000 in accordance with the Guide to the expression of uncertainty in measurements. We focus on the instrumentation-related uncertainty contributions rather than the specific application and thus outline a general procedure which can be adapted for other instruments. Moreover, we discover a systematic signal deviation due to the inertia of the measurement amplifier and develop and apply a correction procedure. Thereby we increase the usable dynamic range of the instrument by more than one order of magnitude. We present methods for the quantification of the uncertainty contributions and combine them into an uncertainty budget for the device

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Uncertainty of measurement in spectrometric analysis: A case study

Cited by 6 publications

References 6 publications

Validation of Analytical Methods for Determination of Methamphetamine Using Fourier Transform Infrared (FTIR) Spectroscopy

Validation of Analytical Methods for Determination of Methamphetamine Using Fourier Transform Infrared (FTIR) Spectroscopy

A Practical Way to ISO/GUM Measurement Uncertainty for Analytical Assays Including In-House Validation Data

Instrumentation-related uncertainty of reflectance and transmittance measurements with a two-channel spectrophotometer

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