ASTM E135-02a
(Terminology)Standard Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
Standard Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
SCOPE
1.1 This is a compilation of terms commonly used in analytical chemistry for metals, ores, and related materials. Terms that are generally understood or defined adequately in other readily available sources are either not included or their sources are identified.
1.2 A definition is a single sentence with additional information included in a Discussion.
1.3 Definitions identical to those published by another standards organization or ASTM committee are identified with the name of the organization or the identifying document and ASTM committee.
1.4 Definitions specific to a particular field (such as emission spectroscopy ) are identified with an italicized introductory phrase.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: E 135 – 02a
Standard Terminology Relating to
Analytical Chemistry for Metals, Ores, and Related
1
Materials
This standard is issued under the fixed designation E 135; 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 (ε) indicates an editorial change since the last revision or reapproval.
1. Scope clear understanding and interpretation of the standards in
which definitions are used.
1.1 This is a compilation of terms commonly used in
analytical chemistry for metals, ores, and related materials.
4. Terminology Definitions
Terms that are generally understood or defined adequately in
absorbance, n—in spectrometry, the logarithm to the base 10
other readily available sources are either not included or their
of the reciprocal of the transmittance, T.
sources are identified.
1.2 A definition is a single sentence with additional infor-
A 5 log ~1/T!52log T (1)
10 10
mation included in a Discussion.
absorption (of electromagnetic radiation), n—a decrease in
1.3 Definitions identical to those published by another
radiant energy when passing through matter, resulting in a
standards organization orASTM committee are identified with
corresponding increase in the energy of the absorbing
the name of the organization or the identifying document and
system.
ASTM committee.
absorption spectrometry, n—the branch of spectroscopy
1.4 Definitions specific to a particular field (such as emis-
pertaining to the absorption of electromagnetic radiation by
sion spectrometry) are identified with an italicized introductory
atoms, ions, radicals, and molecules.
phrase.
analytical curve—see calibration curve.
2. Referenced Documents
analyte, n—in methods of chemical analysis, the component
2.1 ASTM Standards:
determined by a method.
E 180 Practice for Determining the Precision of ASTM
analytical gap, n—in optical emission spectrometry, the re-
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Methods forAnalysis and Testing of Industrial Chemicals
gion between two electrodes in which the specimen is
E 876 Practice for Use of Statistics in the Evaluation of
excited and from which radiant energy is used for analysis.
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Spectrometric Data
analytical line, n—the particular wavelength of an element
E 1914 Practice for Use of Terms Relating to the Develop-
used in determining the presence or concentration of that
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ment and Evaluation of Methods for Chemical Analysis
element.
2.2 ISO Standard:
anneal, vt—in fire assay, to heat and then gradually cool a
ISO Guide 30—Terms and Definitions Used in Connection
metal to remove internal stresses and make the material less
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with Reference Materials
brittle.
arc, condensed—see triggered capacitor discharge.
3. Significance and Use
continuous dc, n—a self-maintaining dc discharge.
3.1 Definitions given in Section 4 are intended for use in all
noncapacitive ac, n—in optical emission spectrometry,a
standards on analytical chemistry for metals, ores, and related
series of separate electrical discharges, individually self-
materials. The definitions should be used uniformly and
initiating or initiated separately by another means, in which
consistently. The purpose of this terminology is to promote
each current pulse has a polarity that is reversed from the
previous one.
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noncapacitive, intermittent dc, n—a series of electrical
This terminology is under the jurisdiction of ASTM Committee E01 on
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct discharges in which dc pulses are initiated by separate
responsibility of Subcommittee E01.23 on Terminology.
means, either mechanically or electrically.
Current edition approved November 10, 2002. Published June 2003. Originally
noncondensed, intermittent dc—see arc, noncapacitive, in-
published as E 135 – 58. Last previous edition E 135 – 02a.
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termittent dc.
Annual Book of ASTM Standards, Vol 15.05.
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Annual Book of ASTM Standards, Vol 03.06.
arc line—not recommended, see atom line.
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York, NY 10036.
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E 135 – 02a
atom line, n—a spectral line resulting from radiation emitted high temperature in an oxidizing atmosphere.
during electron transition as an excited atom returns to a cupel, n—a small, shallow, porous cup, used in assaying to
lower energy level. separate precious metals from lead and other base metals.
atomic absorption spectrometry, n—the branch of spectros- densitometer—not recommended, see microphotometer.
copy pertaining to the absorption of electromagnetic radia- detection limit—a stated
...
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