ASTM E168-99
(Practice)Standard Practices for General Techniques of Infrared Quantitative Analysis
Standard Practices for General Techniques of Infrared Quantitative Analysis
SCOPE
1.1 These practices cover the techniques most often used in infrared quantitative analysis. Practices associated with the collection and analysis of data on a computer are included as well as practices that do not use a computer.
1.2 This standard does not purport to address all of the safety problems, 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. Specific hazard statements appear in Section 6 and Notes A4.7, A4.11, and A5.5.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: E 168 – 99
Standard Practices for
1
General Techniques of Infrared Quantitative Analysis
This standard is issued under the fixed designation E 168; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Apparatus
1.1 These practices cover the techniques most often used in 5.1 The infrared techniques described here assume that the
infrared quantitative analysis. Practices associated with the equipment is of at least the usual commercial quality and meets
collection and analysis of data on a computer are included as the standard specifications of the manufacturer. For dispersive
well as practices that do not use a computer. instruments, also refer to Practice E 932. For Fourier Trans-
1.2 This standard does not purport to address all of the form and dispersive instruments, also refer to Practices E 1421
safety concerns, if any, associated with its use. It is the and E 932 respectively, and for microanalysis with these
responsibility of the user of this standard to establish appro- instruments see Practice E 334.
priate safety and health practices and determine the applica- 5.2 In developing a spectroscopic method, it is the respon-
bility of regulatory limitations prior to use. Specific hazard sibility of the originator to describe the instrumentation and the
statements appear in Section 6 and Note A4.7, Note A4.11, and performance required to duplicate the repeatability and bias of
Note A5.6. a method. It is necessary to specify this performance in terms
that can be used by others in applications of the method.
2. Referenced Documents
6. Hazards
2.1 ASTM Standards:
2
E 131 Terminology Relating to Molecular Spectroscopy 6.1 Users of these practices must be aware that there are
E 334 Practice for General Techniques of Infrared Mi- inherent dangers associated with the use of electrical instru-
2
croanalysis mentation, infrared cells, solvents, and other chemicals, and
E 932 Practice for Describing and Measuring Performance that these practices cannot and will not substitute for a practical
2
of Dispersive Infrared Spectrometers knowledge of the instrument, cells, and chemicals used in a
E 1252 Practice for General Techniques for Qualitative particular analysis.
2
Infrared Analysis
7. Considerations for Quantitative Infrared
E 1421 Practice for Describing and Measuring Performance
Measurements
of Fourier Transform Infrared (FT-IR) Spectrometers:
2
7.1 Quantitative infrared analysis is commonly done with
Level Zero and Level One Tests
E 1655 Practices for Infrared Multivariate Quantitative grating, filter, prism, or interferometer instruments. The fol-
2
lowing guidelines for setting up an analytical procedure are
Analysis
appropriate:
3. Terminology
7.1.1 Always operate the instrument in the most stable and
3.1 For definitions of terms and symbols, refer to Terminol- reproducible conditions attainable. This includes instrument
ogy E 131. warm-up time, sample temperature equilibration, and exact
reproduction of instrument performance tests for both stan-
4. Significance and Use
dards and samples. After calibration, use equivalent settings for
4.1 These practices are intended for all infrared spectrosco-
analyses. For all infrared instruments, refer to the manufactur-
pists. For novices, these practices will serve as an overview of er’s recommendations for the instrument settings. After cali-
preparation, operation, and calculation techniques. For experi-
bration, use these same settings for analysis.
enced persons, these practices will serve as a review when 7.1.2 The absorbance values at analytical wavenumbers
seldom-used techniques are needed.
should fall within the acceptably accurate range of the particu-
lar spectrometer used. In general, a single absorbance measure-
ment will have the best signal-to-noise ratio when it is in the
1
3
These practices are under the jurisdiction of ASTM Committee E-13 on
range from 0.3 to 0.8 absorbance units (AU) (1). The
Molecular Spectroscopy and are the direct responsibility of Subcommittee E13.03
on Infrared Spectroscopy.
Current edition approved Oct. 10, 1999. Published December 1999. Originally
3
published as E 168 – 64 T. Last previous edition E 168 – 92. The boldface numbers in parentheses refer to the list of references at the end of
2
Annual Book of ASTM Standards, Vol 03.06. these practices.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
E 168
sensitivity of Fourier transform (FT-IR) spectrometers is such by molecula
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.