ASTM D3831-98
(Test Method)Standard Test Method for Manganese In Gasoline By Atomic Absorption Spectroscopy
Standard Test Method for Manganese In Gasoline By Atomic Absorption Spectroscopy
SCOPE
1.1 This test method covers the determination of the total manganese content, present as methylcyclopentadienyl manganese tricarbonyl (MMT), of gasoline within the concentration range from 0.25 to 40 mg/L of manganese.
1.2 This test method is applicable to reformulated gasoline containing up to 12 % volume methyl tertiary butylether or up to 10 % volume ethanol. This test method may not be applicable to highly cracked materials containing greater than 18 volume % olefins as determined by Test Method D1319 (nondepentanized).
1.3 This test method has been developed and tested specifically for the determination of MMT in gasoline over the recommended concentration range. Application of the method to other concentration ranges, to the determination of MMT in other materials, or to the determination of other manganese compounds in gasoline have not been tested
1.4 The values stated in SI units are to be regarded as the standard. The preferred concentration units are mg/L manganese.
1.5 This 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. For specific precautionary statements, see Sections 5,6 and 7.
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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: D 3831 – 98 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Manganese In Gasoline By Atomic Absorption
1
Spectroscopy
This standard is issued under the fixed designation D 3831; 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 with methyl isobutyl ketone. The manganese content of the
sample is determined by atomic absorption spectrometry using
1.1 This test method covers the determination of the total
an air-acetylene flame at 279.5 nm and standards prepared from
manganese content, present as methylcyclopentadienyl manga-
2
an organo-manganese standard material.
nese tricarbonyl (MMT) , of gasoline within the concentration
range from 0.25 to 0.30 mg of manganese/L (0.001 to 0.120
4. Significance and Use
g/U.S. gal).
4.1 Certain organo-manganese compounds act as antiknock
1.2 This test method is not applicable to gasoline containing
agents when added to gasoline. This test method provides a
highly cracked materials (greater than 20 Bromine Numbers).
means for determining the concentration of such a material in
1.3 This test method has been developed and tested specifi-
a gasoline sample.
cally for the determination of MMT in gasoline over the
recommended concentration range. Application of the method
5. Apparatus
to other concentration ranges, to the determination of MMT in
5.1 Atomic Absorption Spectrometer, capable of scale ex-
other materials, or to the determination of other manganese
pansion and equipped with a manganese hollow-cathode lamp
compounds in gasoline have not been tested
for monitoring manganese absorption at 279.5 nm, a premix
1.4 This standard does not purport to address all of the
slot-type burner with rotatable burner head, and an adjustable
safety concerns, if any, associated with its use. It is the
nebulizer.
responsibility of the user of this standard to establish appro-
5.2 Glass Vials, 40-mL size with polyethylene-lined screw
priate safety and health practices and determine the applica-
caps.
bility of regulatory limitations prior to use. For specific
5.3 Pipet, Delivery, 1-mL size.
precautionary statements, see Section 7.
5.4 Micropipet, 100-μL size, Eppendorf type or equivalent.
1.5 The values stated in SI units are to be regarded as the
5.5 Automatic Pipet, capable of delivering 9.0-mL quanti-
standard. For reporting purposes, the values stated in grams per
5
ties.
U.S. gallon are the preferred units in the United States.
6. Reagents
2. Referenced Documents
6.1 Purity of Reagents—Reagent grade chemicals shall be
2.1 ASTM Standards:
used in all tests. Unless otherwise indicated, it is intended that
D 1159 Test Method for Bromine Number of Petroleum
all reagents shall conform to the specifications of the Commit-
Distillates and Commercial Aliphatic Olefins by Electro-
3 tee on Analytical Reagents of the American Chemical Society,
metric Titration
6
where such specifications are available. Other grades may be
D 4057 Practice for Manual Sampling of Petroleum and
4 used, provided it is first ascertained that the reagent is of
Petroleum Products
sufficiently high purity to permit its use without lessening the
D 4177 Practice for Automatic Sampling of Petroleum and
4 accuracy of the determination.
Ptroleum Products
6.2 Bromine Solution—Add reagent grade bromine to an
3. Summary Test of Method equal volume of carbon tetrachloride.
3.1 The gasoline sample is treated with bromine and diluted
NOTE 1—Warning: In addition to other precautions, bromine can cause
5
The standard repipet with 950-mL round amber bottle and 10-mL dispenser
1
This test method is under the jurisdiction of ASTM Committee D-2 on
capacity, available from Fisher Scientific Co. 1600 Park View Dr., Pittsburgh, PA
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
15205, has been found satisfactory.
6
D02.03.0Bon Spectrometric Methods.
Reagent Chemicals, American Chemical Society Specifications, American
Current edition approved Nov. 10, 1998. Published January 1999. Originally
Chemical Society, Washington, DC. For suggestions on the testing of reagents not
e1
published as D 3831 – 79. Last previous edition D 3831 – 90(1994) . listed by the American Chemical Society, see Analar Standards for Laboratory
2
MMT is a registered trademark of Ethyl Corp. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
3
Annual Book of ASTM Standards, Vol 05.01. and National Formulary, U.S. Pharmacopeial C
...
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