ASTM E371-99
(Test Method)Standard Test Method for the Determination of Boron in Ferroboron
Standard Test Method for the Determination of Boron in Ferroboron
SCOPE
1.1 These test methods cover the chemical analysis of ferroboron having chemical compositions within the following limits:ElementConcentration, %Aluminum2.00 maxBoron12.0-24.0Carbon1.50 maxChromium0.75 maxCopper0.15 maxLead0.01 maxManganese1.00 maxMolybdenum1.50 maxNickel0.10 maxPhosphorus0.06 maxSilicon4.00 maxSulfur0.02 max
1.2 The test methods in this standard are contained in the sections indicated below: SectionBoron by the Ion-exchange Titrimetric Method (12 to 24 %)9
1.3This standard does not purport to address all of the safety concerns, 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 precautionary statements are given in Section 5 and in special "Warning" paragraphs throughout these test methods.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: E 371 – 99
Standard Test Method for
the Determination of Boron in Ferroboron
This standard is issued under the fixed designation E 371; 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 E 32 Practices for Sampling Ferroalloys and Steel Additives
for Determination of Chemical Composition
1.1 These test methods cover the chemical analysis of
E 50 Practices for Apparatus, Reagents, and Safety Precau-
ferroboron having chemical compositions within the following
tions for Chemical Analysis of Metals
limits:
E 173 Practice for Conducting Interlaboratory Studies of
Element Concentration, %
Methods for Chemical Analysis of Metals
Aluminum 2.00 max
E 882 Guide for Accountability and Quality Control in the
Boron 12.0–24.0
Chemical Analysis Laboratory
Carbon 1.50 max
Chromium 0.75 max
3. Significance and Use
Copper 0.15 max
Lead 0.01 max
3.1 These test methods for the chemical analysis of metals
Manganese 1.00 max
and alloys are primarily intended as referee methods to test
Molybdenum 1.50 max
Nickel 0.10 max
such materials for compliance with compositional specifica-
Phosphorus 0.06 max
tions, particularly those under the jurisdiction of ASTM Com-
Silicon 4.00 max
mittees A1 on Stainless Steel and Related Alloys, and specifi-
Sulfur 0.02 max
cally Specification A 323. It is assumed that all who use these
1.2 The test methods in this standard are contained in the
test methods will be trained analysts capable of performing
sections indicated below:
common laboratory procedures skillfully and safely. It is
Section
expected that work will be performed in a properly equipped
Boron by the Ion-exchange Titrimetric Method (12 to 24 %) 9 laboratory under appropriate quality control practices such as
those described in Guide E 882.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Reagents
responsibility of the user of this standard to establish appro-
4.1 Reagents:
priate safety and health practices and determine the applica-
4.1.1 Purity of Reagents—Unless otherwise indicated, all
bility of regulatory limitations prior to use. Specific precau-
reagents used in these test methods shall conform to the
tionary statements are given in Section 5 and in special
“Reagent Grade” Specifications of the American Chemical
“Warning” paragraphs throughout these test methods.
Society. Other chemicals may be used, provided it is first
ascertained that they are of sufficiently high purity to permit
2. Referenced Documents
their use without adversely affecting the expected performance
2.1 ASTM Standards:
of the determination, as indicated in the section on Precision
A 323 Specification for Ferroboron
and Bias.
D 1193 Specification for Reagent Water
4.1.2 Purity of Water—Unless otherwise indicated, refer-
E 29 Practice for Using Significant Digits in Test Data to
ences to water shall be understood to mean reagent water as
Determine Conformance with Specifications
defined by Type II of Specifications D 1193.
1 5
These test methods are under the jurisdiction of ASTM Committee E-1 on Annual Book of ASTM Standards, Vol 03.05.
Analytical Chemistry for Metals, Ores, and Related Materials and are the direct Annual Book of ASTM Standards, Vol 03.06.
responsibility of Subcommittee E01.01 on Iron, Steel, and Ferroalloys. Reagent Chemicals, American Chemical Society Specifications, American
Current edition approved Dec. 10, 1999. Published February 2000. Originally Chemical Society, Washington, DC. For suggestions on the testing of reagents not
published as E371 – 71 T. Last previous edition E 371–99 (1995)e1. listed by the American Chemical Society, see Analar Standards for Laboratory
Annual Book of ASTM Standards, Vol 01.02. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Annual Book of ASTM Standards, Vol 11.01. and National Formulary, U.S. Pharmaceutical Convention, Inc. (USPC), Rockville,
Annual Book of ASTM Standards, Vol 14.02. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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.
E371–99
5. Hazards of 1 N HCl. Heat at 80 to 90° C for 2 h. Using a pH meter,
adjust the pH to 6.9 with NaOH solution just before use.
5.1 For hazards to be observed in the use of certain reagents
12.4 Ion-Exchange Resin—Use a cation exchange resin of
and equipment in these test methods, refer to Practices E 50.
the 8 % cross linkage type, passing a No. 50 (300-μm) sieve,
but retained on a No. 100 (150-μm) sieve. To prepare the
6. Sampling
ion-exchange apparatus, place a 4-cm plug of glass wool in the
6.1 For procedures for sampling the material, and for
bottom of the column, fill the tube with resin, wash with 100
particle size of the sample for chemical analysis, refer to
mL of HCl (1 + 2), and then wash with water until neutral to
Practices E 32.
litmus paper. During the washing process, adjust the flow rate
to approximately 20 mL/minute.
7. Rounding Calculated Values
12.5 Mannitol, neutral, may be used in the procedure in
7.1 Calculated values shall be rounded off to the desired
place of invert sugar solution.
number of places as directed in 3.4 to 3.6 of Practice E 29.
12.6 Methyl Orange Indicator Solution (1 g/L)—Dissolve
0.1 g of methyl orange in 100 mL of water. Filter if necessary.
8. Interlaboratory Studies
12.7 Sodium Hydroxide, Standard Solution (1 mL equiva-
8.1 These test methods have been evaluated in accordance
lent to approx., 0.001 g B)—Transfer4gof carbonate-free
with Practice E 173, unless otherwise noted in the precision
sodium hydroxide (NaOH) to a polyethylene beaker and
and bias section.
dissolve it in 100 mL of freshly boiled and cooled water.
Transfer the solution to a 1-L polyethylene volumetric flask
BORON BY THE ION-EXCHANGE TITRIMETRIC
and dilute to the mark with more of the freshly boiled and
TEST METHOD
cooled water. Mix. Transfer the solution to a polyethylene
storage container fitted with an Ascarite-II U-tube to protect it
9. Scope
from atmospheric carbon dioxide. Standardize against the
9.1 This test method covers the determination of boron in
boron solution as follows: Using a pipet, transfer 50 mL of the
concentrations from 12.0 to 24.0 %.
boron solution (1 mL = 0.00054 g B) to a 500-mL flask of
low-boron glass, add 250 mL of water, and proceed as directed
10. Summary of Test Method
in 13.4 and 13.5, starting with the addition of the methyl
10.1 The sample is fused with sodium peroxide. The fusion
orange solution. Calculate the boron equivalent of the
...
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