ASTM E130-87(1996)

Standard Practice for Designation of Shapes and Sizes of Graphite Electrodes

SCOPE
1.1 This practice describes a number of specific graphite electrode shapes and sizes that are useful in spectrochemical analysis.

General Information

• Status: Historical
• Publication Date: 09-Oct-1996
• ICS: 25.220.20 - Surface treatment
• Technical Committee: E01 - Analytical Chemistry for Metals, Ores, and Related Materials
• Drafting Committee: E01.20 - Fundamental Practices

Relations

• Replaced By: ASTM E130-87(2003) - Standard Practice for Designation of Shapes and Sizes of Graphite Electrodes
• 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-Oct-1996
• 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-Oct-1996
• 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-Oct-1996

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: E 130 – 87 (Reapproved 1996)
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 particulate specimens. Thin-wall cups allow faster burn off of
graphite and faster consumption of the specimen. Undercut
1.1 This practice describes a number of specific graphite
cups provide greater heating of the specimen.
electrode shapes and sizes that are useful in spectrochemical
5.1.3 Class P—Specimen Electrodes, for use with noncon-
analysis.
ducting specimens or with specimens that require a center post
2. Terminology
that tends to stabilize the excitation.
5.1.4 Class PC—Porous Cup Electrodes, for use with liquid
2.1 preform—a descriptive word applied to a commercially
specimens only.
produced spectroscopic electrode which is purified after ma-
5.1.5 Class D—Specimen Electrodes, of disk shape for use
chining.
with liquid specimens.
3. Summary of Practice
5.1.6 Class VC and VCE—Vacuum Cups and Specimen
Electrodes, consisting of a tubular graphite electrode over
3.1 The practice classifies electrodes by application and
which is positioned a tetrafluorethylene (TFE) cup which holds
provides dimensional specifications.
a liquid specimen.
4. Significance and Use
5.1.7 Class DCP—Electrodes, for use as anodes on direct-
current plasma spectrometers.
4.1 This practice is intended as a reference for spectro-
chemical methods that utilize graphite electrodes. Methods
6. Dimensions
should employ and reference one of the electrode shapes in this
6.1 The dimensions of the electrodes of the various classes
practice, but if this is not possible, the method should include
are given in Fig. 1. Unless exceptions are indicated, the
electrode specifications for the specific shape used.
following tolerances apply:
4.2 This practice should be referred to in a method by
6mm 6in.
including a statement such as the following in the section on
Reagents and Materials:
Outside diameter 0.05 0.002
Graphite Electrodes—The electrode(s) shall be of high-
Length 0.41 0.016
Cavity, inside diameter 0.08 0.003
purity graphite and conform to type(s) (insert designation from
Cavity, depth 0.08 0.003
this method) as depicted in Practice E 130.
Neck, outside diameter 0.13 0.005
Neck, location 0.13 0.005
5. Classes
Neck, length 0.13 0.005
Concentricity, total indicator reading:
5.1 Seven classes of graphite electrodes are designated as
Holes under 12.7 mm (0.5 in.) deep and 0.13 0.005
follows:
undercuts
Holes over 12.7 mm (0.5 in.) deep 0.25 0.010
5.1.1 Class C—Counter Electrodes, for use opposite the
Rotating disks, inside diameter 0.03 0.001
specimen or opposite the electrode that contains the specimen.
Rotating disks, thickness 0.13 0.005
5.1.2 Class S—Specimen Electrodes, for use with liquid or
Boiler caps, inside diameter 0.02 0.001
Porous cups, bottom thickness:
Under 25.4 mm (1 in.) long +0.05 +0.002
−0.00 −0.000
This practice is under the jurisdiction of ASTM Committee E-1 on Analytical
Over 25.4 mm (1 in.) long +0.08 +0.003
Chemistry for Metals, Ores and Related Materials and is the direct responsibility of
−0.00 −0.000
Subcommittee E01.20 on Fundamental Practices.
Angle 60.5°
Current edition approved Feb. 27, 1987. Published April 1987. Originally
e1
published as E 130 – 57 T. Last previous edition E 130 – 81 .
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
E 130
FIG. 1 Recommended Shapes and Sizes of Graphite Electrodes
6mm 6in.
6.2 Certain methods, such as those employing carrier dis-
Cavity, inside diameter 0.01 0.0005
tillation techniques, may
...