ASTM E130-87(2003)

Standard Practice for Designation of Shapes and Sizes of Graphite Electrodes

SIGNIFICANCE AND USE
This practice is intended as a reference for spectrochemical methods that utilize graphite electrodes. Methods should employ and reference one of the electrode shapes in this practice, but if this is not possible, the method should include electrode specifications for the specific shape used.
This practice should be referred to in a method by including a statement such as the following in the section on Reagents and Materials:
Graphite Electrodes—The electrode(s) shall be of high-purity graphite and conform to type(s) (insert designation from this method) as depicted in Practice E 130.
SCOPE
1.1 This practice describes a number of specific graphite electrode shapes and sizes that are useful in spectrochemical analysis.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

General Information

• Status: Historical
• Publication Date: 09-Jun-2003
• ICS: 25.220.20 - Surface treatment
• Technical Committee: E01 - Analytical Chemistry for Metals, Ores, and Related Materials
• Drafting Committee: E01.20 - Fundamental Practices

Relations

• Replaces: ASTM E130-87(1996) - Standard Practice for Designation of Shapes and Sizes of Graphite Electrodes
• Effective Date: 10-Jun-2003
• Replaced By: ASTM E130-08 - Standard Practice for Designation of Shapes and Sizes of Graphite Electrodes (Withdrawn 2013)
• Effective Date: 01-May-2008
• Referred By: ASTM C697-16 - Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Plutonium Dioxide Powders and Pellets
• Effective Date: 10-Jun-2003
• Referred By: ASTM C1517-16 - Standard Test Method for Determination of Metallic Impurities in Uranium Metal or Compounds by DC-Arc Emission Spectroscopy
• Effective Date: 10-Jun-2003
• Referred By: ASTM C698-16 - Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Mixed Oxides ((U, Pu)O<inf>2</inf>)
• Effective Date: 10-Jun-2003

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:E130–87(Reapproved2003)
Standard Practice for
Designation of Shapes and Sizes of Graphite Electrodes
This standard is issued under the fixed designation E 130; 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 5.1.2 Class S—Specimen Electrodes, for use with liquid or
particulate specimens. Thin-wall cups allow faster burn off of
1.1 This practice covers a number of specific graphite
graphite and faster consumption of the specimen. Undercut
electrode shapes and sizes that are useful in spectrochemical
cups provide greater heating of the specimen.
analysis.
5.1.3 Class P—Specimen Electrodes, for use with noncon-
1.2 The values stated in inch-pound units are to be regarded
ducting specimens or with specimens that require a center post
as the standard. The values given in parentheses are for
that tends to stabilize the excitation.
information only.
5.1.4 ClassPC—PorousCupElectrodes, for use with liquid
2. Terminology
specimens only.
5.1.5 Class D—Specimen Electrodes, of disk shape for use
2.1 preform—a descriptive word applied to a commercially
with liquid specimens.
produced spectroscopic electrode which is purified after ma-
5.1.6 Class VC and VCE—Vacuum Cups and Specimen
chining.
Electrodes, consisting of a tubular graphite electrode over
3. Summary of Practice
which is positioned a tetrafluorethylene (TFE) cup which holds
a liquid specimen.
3.1 The practice classifies electrodes by application and
5.1.7 Class DCP—Electrodes, for use as anodes on direct-
provides dimensional specifications.
current plasma spectrometers.
4. Significance and Use
6. Dimensions
4.1 This practice is intended as a reference for spectro-
6.1 The dimensions of the electrodes of the various classes
chemical methods that utilize graphite electrodes. Methods
are given in Fig. 1. Unless exceptions are indicated, the
should employ and reference one of the electrode shapes in this
following tolerances apply:
practice, but if this is not possible, the method should include
6mm 6in.
electrode specifications for the specific shape used.
4.2 This practice should be referred to in a method by
Outside diameter 0.05 0.002
including a statement such as the following in the section on
Length 0.41 0.016
Cavity, inside diameter 0.08 0.003
Reagents and Materials:
Cavity, depth 0.08 0.003
Graphite Electrodes—The electrode(s) shall be of high-
Neck, outside diameter 0.13 0.005
purity graphite and conform to type(s) (insert designation from
Neck, location 0.13 0.005
Neck, length 0.13 0.005
this method) as depicted in Practice E 130.
Concentricity, total indicator reading:
Holes under 12.7 mm (0.5 in.) deep and 0.13 0.005
5. Classes
undercuts
Holes over 12.7 mm (0.5 in.) deep 0.25 0.010
5.1 Seven classes of graphite electrodes are designated as
Rotating disks, inside diameter 0.03 0.001
follows:
Rotating disks, thickness 0.13 0.005
5.1.1 Class C—Counter Electrodes, for use opposite the
Boiler caps, inside diameter 0.02 0.001
Porous cups, bottom thickness:
specimen or opposite the electrode that contains the specimen.
Under 25.4 mm (1 in.) long +0.05 +0.002
−0.00 −0.000
Over 25.4 mm (1 in.) long +0.08 +0.003
This practice is under the jurisdiction of ASTM Committee E01 on Analytical
−0.00 −0.000
Chemistry for Metals, Ores
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