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ASTM D 6122 : 2001

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by

Standard Practice for Validation of Multivariate Process Infrared Spectrophotometers

Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Superseded by

ASTM D 6122 : 2006

Language(s)

English

Published date

10-12-2001

€96.91
Excluding VAT

Committee
D 02
DocumentType
Standard Practice
Pages
25
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1 This practice covers requirements for the validation of measurements made by on-line, process near- or mid-infrared analyzers, or both, used in the calculation of physical, chemical, or quality parameters of liquid petroleum products. The parameters are calculated from spectroscopic data using multivariate modeling methods. The requirements include verification of adequate instrument performance, verification of the applicability of the calibration model to the spectrum of the sample under test, and verification of equivalence between the result calculated from the infrared measurements and the result produced by the primary method used for the development of the calibration model.

1.2 This practice does not cover procedures for establishing the calibration model used by the analyzer. Calibration procedures are covered in Practices E 1655 and references therein.

1.3 This practice is intended as a review for experienced persons. For novices, this practice will serve as an overview of techniques used to verify instrument performance, to verify model applicability to the spectrum of the sample under test, and to verify equivalence between the parameters calculated from the infrared measurement and the results of the primary method measurement.

1.4 This practice teaches and recommends appropriate statistical tools, outlier detection methods, for determining whether the spectrum of the sample under test is a member of the population of spectra used for the analyzer calibration. The statistical tools are used to determine if the infrared measurement results in a valid property or parameter estimate.

1.5 The outlier detection methods do not define criteria to determine whether the sample, or the instrument is the cause of an outlier measurement. Thus, the operator who is measuring samples on a routine basis will find criteria to determine that a spectral measurement lies outside the calibration, but will not have specific information on the cause of the outlier. This practice does suggest methods by which instrument performance tests can be used to indicate if the outlier methods are responding to changes in the instrument response.

1.6 This practice is not intended as a quantitative performance standard for the comparison of analyzers of different design.

1.7 Although this practice deals primarily with validation of on-line, process infrared analyzers, the procedures and statistical tests described herein are also applicable to at-line and laboratory infrared analyzers which employ multivariate models.

1.8 This standard does not purport to address all of the safety concerns, if any associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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ASTM D 6621 : 2000 : R2017 Standard Practice for Performance Testing of Process Analyzers for Aromatic Hydrocarbon Materials
ASTM D 7314 : 2010 : R2015 Standard Practice for Determination of the Heating Value of Gaseous Fuels using Calorimetry and On-line/At-line Sampling
ASTM E 2898 : 2014 Standard Guide for Risk-Based Validation of Analytical Methods for PAT Applications
ASTM E 1655 : 2017 Standard Practices for Infrared Multivariate Quantitative Analysis
ASTM D 7453 : 2018 Standard Practice for Sampling of Petroleum Products for Analysis by Process Stream Analyzers and for Process Stream Analyzer System Validation
ASTM D 7235 : 2016 Standard Guide for Establishing a Linear Correlation Relationship Between Analyzer and Primary Test Method Results Using Relevant ASTM Standard Practices
ASTM D 7166 : 2010 : R2015 Standard Practice for Total Sulfur Analyzer Based On-line/At-line for Sulfur Content of Gaseous Fuels
ASTM D 7165 : 2010 : R2015 Standard Practice for Gas Chromatograph Based On-line/At-line Analysis for Sulfur Content of Gaseous Fuels

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