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ASTM E 925 : 2009 : R2014

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Standard Practice for Monitoring the Calibration of Ultraviolet-Visible Spectrophotometers whose Spectral Bandwidth does not Exceed 2 nm

Available format(s)

Hardcopy , PDF

Superseded date

12-11-2022

Language(s)

English

Published date

05-06-2014

€67.30
Excluding VAT

CONTAINED IN VOL. 03.06, 2014 Defines the parameters of spectrophotometric performance that are critical for testing the adequacy of instrumentation for most routine tests and methods within the wavelength range of 200 to 700 nm and the absorbance range of 0 to 2.

Committee
E 13
DocumentType
Standard Practice
Pages
7
ProductNote
Reconfirmed 2014
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1This practice covers the parameters of spectrophotometric performance that are critical for testing the adequacy of instrumentation for most routine tests and methods2 within the wavelength range of 200 to 700 nm and the absorbance range of 0 to 2. The recommended tests provide a measurement of the important parameters controlling results in spectrophotometric methods, but it is specifically not to be inferred that all factors in instrument performance are measured.

1.2This practice may be used as a significant test of the performance of instruments for which the spectral bandwidth does not exceed 2 nm and for which the manufacturer's specifications for wavelength and absorbance accuracy do not exceed the performance tolerances employed here. This practice employs an illustrative tolerance of ±1 % relative for the error of the absorbance scale over the range of 0.2 to 2.0, and of ±1.0 nm for the error of the wavelength scale. A suggested maximum stray radiant power ratio of 4 × 10-4 yields <1 % absorbance bias at an absorbance of 2. These tolerances are chosen to be compatible with many chemical applications while comfortably exceeding the uncertainty of the certified values for the reference materials and typical manufacturer's specifications for error in the wavelength and absorbance scales of the instrument under test. The user is encouraged to develop and use tolerance values more appropriate to the requirements of the end use application. This procedure is designed to verify quantitative performance on an ongoing basis and to compare one instrument's performance with that of other similar units. Refer to Practice E275 to extensively evaluate the performance of an instrument.

1.3This practice should be performed on a periodic basis, the frequency of which depends on the physical environment within which the instrumentation is used. Thus, units handled roughly or used under adverse conditions (exposed to dust, chemical vapors, vibrations, or combinations thereof) should be tested more frequently than those not exposed to such conditions. This practice should also be performed after any significant repairs are made on a unit, such as those involving the optics, detector, or radiant energy source.

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5This 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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ASTM E 1866 : 1997 : R2021 Standard Guide for Establishing Spectrophotometer Performance Tests
ASTM D 8470 : 2022 Standard Practice for Development and Implementation of Instrument Performance Tests for Use on Multivariate Online, At-Line and Laboratory Spectroscopic Based Analyzer Systems
ASTM E 2153 : 2001 : R2017 Standard Practice for Obtaining Bispectral Photometric Data for Evaluation of Fluorescent Color
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ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
ASTM E 1866 : 1997 : R2002 Standard Guide for Establishing Spectrophotometer Performance Tests
ASTM E 1866 : 1997 : R2007 Standard Guide for Establishing Spectrophotometer Performance Tests
ASTM E 275 : 2008 Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
ASTM E 275 : 2008 : R2013 Standard Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
ASTM E 275 : 2008 : R2022 Standard Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
ASTM E 169 : 2016 : REDLINE Standard Practices for General Techniques of Ultraviolet-Visible Quantitative Analysis
ASTM E 1866 : 1997 : R2021 Standard Guide for Establishing Spectrophotometer Performance Tests
ASTM E 1866 : 1997 Standard Guide for Establishing Spectrophotometer Performance Tests
ASTM E 1866 : 1997 : R2013 Standard Guide for Establishing Spectrophotometer Performance Tests
ISO Guide 34:2009 General requirements for the competence of reference material producers

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