ASTM E124-94(2016)

Standard Specification for Weighing and Drying Apparatus for Microchemical Analysis

ABSTRACT
This specification covers the general requirements for the components that comprise the apparatus used for the weighing and drying operations in the laboratory practice of microchemical analysis. The components covered here are the following: combustion boats; weighing bottles, cup, and tubes; spatulas; forceps; tare flasks; metal cooling block; metal crucible container with glass cover; and micro glass desiccator with metal insert.
SCOPE
1.1 This specification covers apparatus used for weighing and drying operations in microchemical laboratory practice.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents may be approximate.  
Note 1: This specification was originally developed by the Committee on Microchemical Apparatus, Division of Analytical Chemistry, American Chemical Society.2

General Information

• Status: Historical
• Publication Date: 31-Aug-2016
• ICS: 71.040.20 - Laboratory ware and related apparatus
• Technical Committee: E41 - Laboratory Apparatus
• Drafting Committee: E41.01 - Laboratory Ware and Supplies

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:E124 −94 (Reapproved 2016)
Standard Specification for
1
Weighing and Drying Apparatus for Microchemical Analysis
This standard is issued under the fixed designation E124; 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.
1. Scope 4. Weighing Bottles
4.1 Weighing bottles of seven capacities shall conform to
1.1 This specification covers apparatus used for weighing
the requirements in Table 2 and Figs. 4-9, inclusive.
and drying operations in microchemical laboratory practice.
1.2 The values stated in inch-pound units are to be regarded
5. Weighing Cup
as the standard. The metric equivalents may be approximate.
5.1 The weighing cup shall conform to the requirements
NOTE 1—This specification was originally developed by the Committee shown in Fig. 11, and shall be made of platinum-rhodium alloy
on MicrochemicalApparatus, Division ofAnalytical Chemistry,American
containing 3.5 % rhodium. The cup is designed to be used as a
2
Chemical Society.
sample container to fit into the weighing bottle shown in Fig.
5, and is useful for weighing hygroscopic materials.
2. Referenced Documents
3
6. Weighing Tubes
2.1 ASTM Standards:
E671 Specification for Maximum Permissible Thermal Re-
6.1 Weighing tubes of three types shall conform to the
sidual Stress in Annealed Glass Laboratory Apparatus
requirements shown in Fig. 12, Fig. 13, and Fig. 14. These
E920 Specification for Commercially Packaged Laboratory
tubes should preferably be made of soda-lime glass.
Apparatus
7. Spatulas
E921 Specification for Export Packaged Laboratory Appa-
ratus
7.1 Spatulas of four types, and preferably made of stainless
E1133 Practice for Performance Testing of Packaged Labo-
steel, shall conform to the following requirements:
ratory Apparatus for United States Government Procure-
7.1.1 TypeA(Fig. 15)—This spatula is generally useful.The
ments
top can be used for crushing crystals and the bent blade for
E1157 Specification for Sampling and Testing of Reusable
scraping containers.
Laboratory Glassware
7.1.2 TypeB(Fig. 16)—This spatula has a flat bent portion
at one end and a V-shaped scoop at the other end. It is
3. Combustion Boats
particularly useful for weighing samples.
7.1.3 TypeC(Fig.17)—Thisspatulaissuitableforthelarger
3.1 Combustion boats of three sizes shall conform to the
samples commonly encountered in semimicro and preparative
requirements in Table 1 and Fig. 1, Fig. 2, and Fig. 3. These
work.IthasaU-shapedscoopatoneendandaV-shapedscoop
boats shall be made of platinum-rhodium alloy containing
at the other end. The spatula can be used to add shot or beads
3.5 % rhodium.
to tare flasks and for measuring and introducing solid reagent
into combustion tubes.
7.1.4TypeD(Fig. 18)—This spatula is useful in many
1
This specification is under the jurisdiction of ASTM Committee E41 on
microchemical applications.
Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
Laboratory Ware and Supplies.
8. Forceps
Current edition approved Sept. 1, 2016. Published September 2016. Originally
approved in 1956. Last previous edition approved in 2010 as E124 – 94 (2010).
8.1 Forceps of two types, made of nickel-plated steel, shall
DOI: 10.1520/E0124-94R16.
2 conform to the following requirements:
See the “1949 Report on Recommended Specifications for Microchemical
Apparatus, Carbon-Hydrogen, Dumas Nitrogen, Sulfur and Halogen,” Analytical
8.1.1 ForcepswithPlatinum—5%RutheniumTips(Fig.19)
Chemistry, Vol 21, December 1949, p. 1555; and the “1953 Report on Recom-
The pin serves as a stop to prevent the forceps from being
mended Specifications for Microchemical Apparatus, Weighing and Drying,”
depressed to such an extent that the tips can open, allowing the
Analytical Chemistry, Vol 26, July 1954, p. 1186.
3
held object to drop. When pressed together, the tips make
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1 1
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
contact for a distance of ⁄4 to ⁄2 in. (6.4 to 12.7 mm).
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. NOTE 2—Depending upon the intended use, other materials may be
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E124−94 (2016)
substituted for the platinum alloy. Thec construction and over-all dimen-
desiccator with cover and an aluminum insert which shall hold
sions should be identical with those shown in Fig. 19.
securely the metal cooling block
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E124 − 94 (Reapproved 2010) E124 − 94 (Reapproved 2016)
Standard Specification for
1
Weighing and Drying Apparatus for Microchemical Analysis
This standard is issued under the fixed designation E124; 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.
1. Scope
1.1 This specification covers apparatus used for weighing and drying operations in microchemical laboratory practice.
1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents may be approximate.
NOTE 1—This specification was originally developed by the Committee on Microchemical Apparatus, Division of Analytical Chemistry, American
2
Chemical Society.
2. Referenced Documents
3
2.1 ASTM Standards:
E671 Specification for Maximum Permissible Thermal Residual Stress in Annealed Glass Laboratory Apparatus
E920 Specification for Commercially Packaged Laboratory Apparatus
E921 Specification for Export Packaged Laboratory Apparatus
E1133 Practice for Performance Testing of Packaged Laboratory Apparatus for United States Government Procurements
E1157 Specification for Sampling and Testing of Reusable Laboratory Glassware
3. Combustion Boats
3.1 Combustion boats of three sizes shall conform to the requirements in Table 1 and Fig. 1, Fig. 2, and Fig. 3. These boats shall
be made of platinum-rhodium alloy containing 3.5 % rhodium.
4. Weighing Bottles
4.1 Weighing bottles of seven capacities shall conform to the requirements in Table 2 and Figs. 4-9, inclusive.
5. Weighing Cup
5.1 The weighing cup shall conform to the requirements shown in Fig. 11, and shall be made of platinum-rhodium alloy
containing 3.5 % rhodium. The cup is designed to be used as a sample container to fit into the weighing bottle shown in Fig. 5,
and is useful for weighing hygroscopic materials.
6. Weighing Tubes
6.1 Weighing tubes of three types shall conform to the requirements shown in Fig. 12, Fig. 13, and Fig. 14. These tubes should
preferably be made of soda-lime glass.
7. Spatulas
7.1 Spatulas of four types, and preferably made of stainless steel, shall conform to the following requirements:
7.1.1 Type A (Fig. 15)—This spatula is generally useful. The top can be used for crushing crystals and the bent blade for scraping
containers.
1
This specification is under the jurisdiction of ASTM Committee E41 on Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on
ApparatusLaboratory Ware and Supplies.
Current edition approved July 1, 2010Sept. 1, 2016. Published July 2010September 2016. Originally approved in 1956. Last previous edition approved in 20052010 as
E124 – 94 (2005).(2010). DOI: 10.1520/E0124-94R10.10.1520/E0124-94R16.
2
See the “1949 Report on Recommended Specifications for Microchemical Apparatus, Carbon-Hydrogen, Dumas Nitrogen, Sulfur and Halogen,” Analytical Chemistry,
Vol 21, December 1949, p. 1555; and the “1953 Report on Recommended Specifications for Microchemical Apparatus, Weighing and Drying,” Analytical Chemistry, Vol
26, July 1954, p. 1186.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E124 − 94 (2016)
7.1.2 Type B (Fig. 16)—This spatula has a flat bent portion at one end and a V-shaped scoop at the other end. It is particularly
useful for weighing samples.
7.1.3 Type C (Fig. 17)—This spatula is suitable for the larger samples commonly encountered in semimicro and preparative
work. It has a U-shaped scoop at one end and a V-shaped scoop at the other end. The spatula can be used to add shot or beads
to tare flasks and for measuring and introducing solid reagent into combustion tubes.
7.1.4 Type D (Fig. 18)—This spatula is useful in many microchemical applications.
8. Forceps
8.1 Forceps of two types, made of nickel-plated steel, shall conform to the following requirements:
8.1.1 Forceps with Platinum—5 % Ruthenium Tips (Fig. 19) The pin serves as a stop to prevent the forceps from being
depressed to such an extent that the tips can open, allowing the held
...