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ASTM D6129-97

(Test Method)

Standard Test Method for Silicon in Engine Coolant Concentrates by Atomic Absorption Spectroscopy

Standard Test Method for Silicon in Engine Coolant Concentrates by Atomic Absorption Spectroscopy

SCOPE
1.1 This test method covers the determination of silicon in the range from 200 to 500 ppm in engine coolant concentrates by atomic absorption. This method is as accurate and precise as photometric methods, while requiring considerably less operator time and avoiding problems with reagent instability.

General Information

Status
Historical
Publication Date
09-May-1997
Technical Committee
D15 - Engine Coolants and Related Fluids
Drafting Committee
D15.04 - Chemical Properties
Current Stage
Ref Project

Relations

Replaced By
ASTM D6129-97(2002) - Standard Test Method for Silicon in Engine Coolant Concentrates by Atomic Absorption Spectroscopy
Effective Date
10-May-1997
Referred By
ASTM D4985-10(2023) - Standard Specification for Low Silicate Ethylene Glycol Base Engine Coolant for Heavy Duty Engines Requiring a Pre-Charge of Supplemental Coolant Additive (SCA)
Effective Date
10-May-1997
Referred By
ASTM D5752-10(2017) - Standard Specification for Supplemental Coolant Additives (SCAs) for Use in Precharging Coolants for Heavy-Duty Engines
Effective Date
10-May-1997

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ASTM D6129-97 - Standard Test Method for Silicon in Engine Coolant Concentrates by Atomic Absorption SpectroscopyASTM D6129-97 - Standard Test Method for Silicon in Engine Coolant Concentrates by Atomic Absorption Spectroscopy
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ASTM D6129-97 - Standard Test Method for Silicon in Engine Coolant Concentrates by Atomic Absorption Spectroscopy
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 6129 – 97
Standard Test Method for
Silicon in Engine Coolant Concentrates by Atomic
Absorption Spectroscopy
This standard is issued under the fixed designation D 6129; 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. Reagents
1.1 This test method covers the determination of silicon in 5.1 Reagent grade chemicals shall be used in all tests.
the range from 200 to 500 ppm in engine coolant concentrates 5.2 References to water shall be understood to mean dis-
by atomic absorption. This method is as accurate and precise as tilled water or water of equal quality.
photometric methods, while requiring considerably less opera- 5.3 Standard Silicon Solution, 1000 mg/L (see Note 1).
tor time and avoiding problems with reagent instability. 5.4 Ethylene Glycol (propylene glycol should be used when
1.1.1 Coolants with silicon content outside of this range analyzing PG-based coolants).
may be analyzed by this method by suitably adjusting the 5.5 Sodium Hydroxide, 5 % in water (see Note 1). When
sample size. Care should be taken to ensure that the glycol preparing from solid sodium hydroxide avoid prolonged expo-
content of the working standards corresponds to that of the sure to the atmosphere. DO NOT STORE IN GLASS.
sample solution being analyzed. 5.6 Working standards: 0, 20, 40, and 60 mg/L silicon.
1.2 The values stated in SI units are to be regarded as the 5.6.1 Prepare these solutions by pipetting 2.0, 4.0, and 6.0
standard. mL of the 1000 mg/L standard silicon solution into separate
1.3 This standard does not purport to address all of the 100 mL volumetric flasks. Add 10.0 mL of ethylene glycol and
safety concerns, if any, associated with its use. It is the 2.0 mL of 5 % sodium hydroxide solution to each flask and
responsibility of the user of this standard to establish appro- dilute to volume with water. Prepare the zero standard solution
priate safety and health practices and determine the applica- by adding 10.0 mL ethylene glycol and 2.0 mL 5 % sodium
bility of regulatory limitations prior to use. hydroxide solution to another 100 mL volumetric flask and
diluting to volume with water.
2. Referenced Documents
NOTE 1—Standard silicon solutions and sodium hydroxide solutions are
2.1 ASTM Standards:
available from most laboratory supply companies.
D 1176 Test Method for Sampling and Preparing Aqueous
Solutions of Engine Coolants or Antirusts for Testing 6. Sampling
Purposes
6.1 Sample material in accordance with Test Method
D 1176.
3. Summary of Test Method
3.1 The sample is dissolved in water and the silicon content 7. Procedure
is determined from a standard curve established at the time the
7.1 To the nearest 0.001 g, weigh5gof sample into a 50 mL
sample is run. An atomic absorption spectrometer with a
volumetric flask. Dissolve in and dilute to volume with water.
nitrous oxide-acetylene flame is used.
7.2 Using the nitrous oxide-acetylene flame, optimize the
instrument operating conditions for silicon determination at the
4. Apparatus
251.6 nm spectral line according to the manufacturer’s recom-
4.1 Atomic Absorption Spectrometer, with nitrous oxide-
mendations.
acetylene flame.
7.3 Obtain the approximate absorbance reading of the
4.2 Hollow-Cathode Lamp, for silicon.
sample solution versus the zero standard solution (containing
glycol and sodium hydroxide).
7.4 Choose the working standard solutions that will give
This specification is under the jurisdiction of ASTM Committee D15 on Engine
Coolants and is the direct responsibility of Subcommittee D15.04 on Chemical
Reagent Chemicals, American Chemical Society Sp
...

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This specification covers grades of fuel oil intended for use in various types of fuel-oil-burning equipment under various climatic and operating conditions. These grades include the following: Grades No. 1 S5000, No. 1 S500, No. 2 S5000, and No. 2 S500 for use in domestic and small industrial burners; Grades No. 1 S5000 and No. 1 S500 adapted to vaporizing type burners or where storage conditions require low pour point fuel; Grades No. 4 (Light) and No. 4 (Heavy) for use in commercial/industrial burners; and Grades No. 5 (Light), No. 5 (Heavy), and No. 6 for use in industrial burners. Preheating is usually required for handling and proper atomization. The grades of fuel oil shall be homogeneous hydrocarbon oils, free from inorganic acid, and free from excessive amounts of solid or fibrous foreign matter. Grades containing residual components shall remain uniform in normal storage and not separate by gravity into light and heavy oil components outside the viscosity limits for the grade. The grades of fuel oil shall conform to the limiting requirements prescribed for: (1) flash point, (2) water and sediment, (3) physical distillation or simulated distillation, (4) kinematic viscosity, (5) Ramsbottom carbon residue, (6) ash, (7) sulfur, (8) copper strip corrosion, (9) density, and (10) pour point. The test methods for determining conformance to the specified properties are given.
SCOPE
1.1 This specification (see Note 1) covers grades of fuel oil intended for use in various types of fuel-oil-burning equipment under various climatic and operating conditions. These grades are described as follows:  
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4.1 This practice shall be used when ultrasonic inspection is required by the order or specification for inspection purposes where the acceptance of the forging is based on limitations of the number, amplitude, or location of discontinuities, or a combination thereof, which give rise to ultrasonic indications.  
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FIG. 1 Bored Forgings
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FIG. 2 Solid Forgings
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FIG. 3 Conversion Factors to Be Used in Conjunction with Fig. 1 and Fig. 2 if a Change in the Reference Reflector Diameter is Required
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