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ASTM E275-08(2013)

(Practice)

Standard Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers

Standard Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers

SIGNIFICANCE AND USE
4.1 This practice permits an analyst to compare the general performance of an instrument, as it is being used in a specific spectrophotometric method, with the performance of instruments used in developing the method.
SCOPE
1.1 This practice covers the description of requirements of spectrophotometric performance, especially for test methods, and the testing of the adequacy of available equipment for a specific method (for example, qualification for a given application). The tests give a measurement of some of the important parameters controlling results obtained in spectrophotometric methods, but it is specifically not to be concluded that all the factors in instrument performance are measured, or in fact may be required for a given application.  
1.1.1 This practice is primarily directed to dispersive spectrophotometers used for transmittance measurements rather than instruments designed for diffuse transmission and diffuse reflection.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Dec-2012
ICS
17.180.30 - Optical measuring instruments
Technical Committee
E13 - Molecular Spectroscopy and Separation Science
Drafting Committee
E13.01 - Ultra-Violet, Visible, and Luminescence Spectroscopy
Current Stage
Ref Project

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ASTM E275-08(2013) - Standard Practice for Describing and Measuring Performance of Ultraviolet and Visible SpectrophotometersASTM E275-08(2013) - Standard Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
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ASTM E275-08(2013) - Standard Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E275 − 08 (Reapproved 2013)
Standard Practice for
Describing and Measuring Performance of Ultraviolet and
1
Visible Spectrophotometers
This standard is issued under the fixed designation E275; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
In developing a spectrophotometric method, it is the responsibility of the originator to describe the
instrumentation and the performance required to duplicate the precision and accuracy of the method.
It is necessary to specify this performance in terms that may be used by others in applications of the
method.
The tests and measurements described in this practice are for the purpose of determining the
experimental conditions required for a particular analytical method. In using this practice, an analyst
has either a particular analysis for which he describes requirements for instrument performance or he
expects to test the capability of an instrument to perform a particular analysis. To accomplish either
of these objectives, it is necessary that instrument performance be obtained in terms of the factors that
control the analysis. Unfortunately, it is true that not all the factors that can affect the results of an
analysis are readily measured and easily specified for the various types of spectrophotometric
equipment.
Of the many factors that control analytical results, this practice covers verification of the essential
parameters of wavelength accuracy, photometric accuracy, stray light, resolution, and characteristics
of absorption cells as the parameters of spectrophotometry that are likely to be affected by the analyst
in obtaining data. Other important factors, particularly those primarily dependent on instrument
design, are also covered in this practice.
1. Scope 1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
1.1 This practice covers the description of requirements of
standard.
spectrophotometric performance, especially for test methods,
1.3 This standard does not purport to address all of the
and the testing of the adequacy of available equipment for a
safety concerns, if any, associated with its use. It is the
specific method (for example, qualification for a given appli-
responsibility of the user of this standard to establish appro-
cation).The tests give a measurement of some of the important
priate safety and health practices and determine the applica-
parameters controlling results obtained in spectrophotometric
bility of regulatory limitations prior to use.
methods, but it is specifically not to be concluded that all the
factors in instrument performance are measured, or in fact may
2. Referenced Documents
be required for a given application.
2
1.1.1 This practice is primarily directed to dispersive spec- 2.1 ASTM Standards:
E131 Terminology Relating to Molecular Spectroscopy
trophotometers used for transmittance measurements rather
than instruments designed for diffuse transmission and diffuse E168 Practices for General Techniques of Infrared Quanti-
3
tative Analysis (Withdrawn 2015)
reflection.
1 2
This practice is under the jurisdiction of ASTM Committee E13 on Molecular For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Spectroscopy and Separation Science and is the direct responsibility of Subcom- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
mittee E13.01 on Ultra-Violet, Visible, and Luminescence Spectroscopy. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 1, 2013. Published January 2013. Originally the ASTM website.
3
The last approved version of this historical standard is referenced on
approved in 1965. Last previous edition approved in 2008 as E275 – 08. DOI:
www.astm.org.
10.1520/E0275-08R13.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E275 − 08 (2013)
E169 PracticesforGeneralTechniquesofUltraviolet-Visible stants. Rigorous measurement of these factors is beyond the
Quantitative Analysis scopeofthispractice.Themeasurementofstrayradiantenergy
E387 TestMethodforEstimatingStrayRadiantPowerRatio is described in Test Method E387 and resolution in Practice
of Dispersive Spectrophotometers by the Opaque Filter E958.
Method
6.2 Modern spectrophotometers are capable of more accu-
E958 Practice for Estimation of the Spectral Bandwidth of
racy than most analysts obtain. The problem lies in the
Ultraviolet-Visible Spect
...

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SCOPE
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SIGNIFICANCE AND USE
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4.1 This practice permits an analyst to compare the general performance of an instrument, as it is being used in a specific spectrophotometric method, with the performance of instruments used in developing the method.
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4.1 This practice permits an analyst to compare the general performance of an instrument on any given day with the prior performance of an instrument. This practice is not necessarily meant for comparison of different instruments with each other even if the instruments are of the same type and model. This practice is not meant for comparison of the performance of one instrument operated under differing conditions.
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1.1 This practice describes two levels of tests to measure the performance of laboratory Fourier transform mid-infrared (FT-MIR) spectrometers equipped with a standard sample holder used for transmission measurements.  
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1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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Standard Practice for Estimation of the Spectral Bandwidth of Ultraviolet-Visible Spectrophotometers

SIGNIFICANCE AND USE
4.1 These practices should be used by a person who develops an analytical method to ensure that the spectral bandwidths cited in the practice are actually the ones used.
Note 2: The method developer should establish the spectral bandwidths that can be used to obtain satisfactory results.  
4.2 These practices should be used to determine whether a spectral bandwidth specified in a method can be realized with a given spectrophotometer and thus whether the instrument is suitable for use in this application. If accurate absorbance measurements are to be made on compounds with sharp absorption bands (natural half band widths of less than 15 nm) the spectral bandwidth of the spectrometer used should be better than 1/8th of the natural half band width of the compound’s absorption.  
4.3 These practices allow the user of a spectrophotometer to estimate the actual spectral bandwidth of the instrument under a given set of conditions and to compare the result to the spectral bandwidth calculated from data given in the manufacturer's literature or indicated by the instrument.
SCOPE
1.1 This practice describes procedures for estimating the spectral bandwidth of a spectrophotometer in the wavelength region of 185 nm to 820 nm.  
1.2 These practices are applicable to all modern spectrophotometer designs utilizing computer control and data handling. This includes conventional optical designs, where the sample is irradiated by monochromatic light, and ‘reverse’ optic designs coupled to photodiode arrays, where the light is separated by a polychromator after passing through the sample. For spectrophotometers that utilize servo-operated slits and maintain a constant period and a constant signal-to-noise ratio as the wavelength is automatically scanned, and/or utilize fixed slits and maintain a constant servo loop gain by automatically varying gain or dynode voltage, refer to the procedure described in Annex A1. This procedure is identical to that described in earlier versions of this practice.  
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1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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ASTM E1982-98(2021)(Practice)
Standard Practice for Open-Path Fourier Transform Infrared (OP/FT-IR) Monitoring of Gases and Vapors in Air

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4.1 An OP/FT-IR monitor can, in principle, measure the concentrations of all IR-active gases and vapors in the atmosphere. Detailed descriptions of OP/FT-IR systems and the fundamental aspects of their operation are given in Practice E1685 and the FT-IR Open-Path Monitoring Guidance Document. A method for processing OP/FT-IR data to obtain the concentrations of gases over a long, open path is given in Compendium Method TO-16. Applications of OP/FT-IR systems include monitoring for gases and vapors in ambient air, along the perimeter of an industrial facility, at hazardous waste sites and landfills, in response to accidental chemical spills or releases, and in workplace environments.
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Standard Test Method for Linearity of Fluorescence Measuring Systems

SIGNIFICANCE AND USE
3.1 The range of concentration of a fluorescing substance in solution over which the fluorescence varies linearly with the concentration is the range most useful for quantitative analysis. This range is affected by properties of the solution under analysis and by features of the measuring system. This test method provides a means of testing the performance of a fluorescence measuring system and of determining the concentration range over which the system is suitable for making a given quantitative analysis.  
3.2 This test method is not meant for comparing the performance of different fluorescence measuring instruments.
SCOPE
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