ASTM D1018-00(2005)
(Test Method)Standard Test Method for Hydrogen In Petroleum Fractions
Standard Test Method for Hydrogen In Petroleum Fractions
SIGNIFICANCE AND USE
Knowledge of the hydrogen content of petroleum products, particularly fuels, can be helpful in assessing performance characteristics.
This test method is suitable for most laboratory applications requiring the determination of hydrogen in liquid petroleum lubricants and products.
SCOPE
1.1 This test method covers the determination of hydrogen in petroleum fractions that can be burned completely without smoking in a wick lamp.
1.2 The values stated in SI units are to be regarded as the standard.
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.
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D1018–00 (Reapproved 2005)
Standard Test Method for
Hydrogen In Petroleum Fractions
This standard is issued under the fixed designation D1018; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4.2 This test method is suitable for most laboratory appli-
cations requiring the determination of hydrogen in liquid
1.1 This test method covers the determination of hydrogen
petroleum lubricants and products.
in petroleum fractions that can be burned completely without
smoking in a wick lamp.
5. Apparatus
1.2 The values stated in SI units are to be regarded as the
5.1 Lamp—A lamp (see Note 1) consisting of a 25-mL
standard.
Erlenmeyer flask, a burner, and a burner cap conforming to the
1.3 This standard does not purport to address all of the
dimensions shown in Fig. 1. The burner consists of two
safety concerns, if any, associated with its use. It is the
concentric glass tubes, the external one having an arm,
responsibility of the user of this standard to establish appro-
provided with standard-taper glass joints for connection with
priate safety and health practices and determine the applica-
the flask, chimney, and burner cap. The burner has a small
bility of regulatory limitations prior to use.
opening near its base to allow equalization of the pressure
2. Referenced Documents between the chimney and flask.
2.1 ASTM Standards:
NOTE 1—The lamp and burner are constructed in accordance with
D1266 Test Method for Sulfur in Petroleum Products
Appendix A3 of Test Method D1266.
(Lamp Method)
5.2 Chimney—A chimney (see Note 2) conforming to the
D4057 Practice for Manual Sampling of Petroleum and
dimensions shown in Fig. 1.
Petroleum Products
NOTE 2—The chimney is constructed in accordance withAppendixA3
D4177 Practice for Automatic Sampling of Petroleum and
of Test Method D1266, except that the delivery tube is cut off and a short
Petroleum Products
length of glass tubing is sealed on at right angles to the chimney. The
D6299 Practice for Applying Statistical Quality Assurance
secondary air inlet is not used and is sealed off.
and Control Charting Techniques to Evaluate Analytical
5.3 Absorbers—Two absorption bulbs suitable for collect-
Measurement System Performance
ing and weighing the water formed during combustion of the
3. Summary of Test Method sample. The bulbs shall be filled in the following manner: a 1-
to 2-cm layer of glass wool, a 5-cm layer of 6- to 10-mesh cp
3.1 The test specimen is burned from a cotton wick in an
anhydrouscalciumchloride,a1-cmlayerofglasswool,a2-cm
atmosphere of purified air. The water formed is collected from
layer of phosphorus pentoxide, and glass wool to the top of the
the combustion gases by a desiccant and weighed.
absorbers. One filling is sufficient for approximately 10 g of
4. Significance and Use
water.
5.4 Cotton Wicking—Clean, unused, uniform, two-strand
4.1 Knowledge of the hydrogen content of petroleum prod-
twistedcottonwickingofgoodquality,weighing0.5to0.6g/m
ucts,particularlyfuels,canbehelpfulinassessingperformance
per strand.
characteristics.
5.5 Air Purifying System—The compressed air (Warning—
Compressed gas under higher pressure) for the combustion
This test method is under the jurisdiction of ASTM Committee D02 on
shall be purified by passage through a scrubber containing
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
sulfuric acid (relative density 1.84), a surge chamber packed
D02.03 on Elemental Analysis.
Current edition approved May 1, 2005. Published May 2005. Originally
with glass wool, and a drying tower filled with 10 to 20-mesh
approved in 1949. Last previous edition approved in 2000 as D1018 – 00. DOI:
10.1520/D1018-00R05.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Turner-type absorption bulbs are satisfactory for this test method.
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D1018–00 (2005)
such specifications are available. Other grades may be used,
provided it is first ascertained that the reagent is of sufficiently
high purity to permit its use without lessening the accuracy of
the determination.
6.2 Calcium chloride (CaCl ).
6.3 Calcium sulfate, anhydrous (CaSO ).
6.4 Phosphorous pentoxide (P O ).
2 5
6.5 Sulfuric acid (H SO ), relative density 1.84.
2 4
6.6 Quality Control (QC) Samples, preferably, portions of
one or more liquid petroleum materials that are stable and
representative of the samples of interest. These QC samples
can be used to check the validity of the testing process, as
described in Section 10.
7. Sampling
7.1 Obtain samples in accordance with the instructions in
Practices D4057 or D4177. Ensure that test specimens are
representativeofthetestunit.Vigorousstirringorshakingmay
be necessary.
8. Procedure
8.1 Connect the charged absorbers to each other and to the
chimney delivery tube as shown in the complete assembly of
theapparatusinFig.2.AttachtheU-tubecontaininganhydrous
calcium sulfate to the exit end of the second absorber to
eliminate diffusion of water vapor back into the system.
Immersethelowerhalfoftheabsorbersintotheice-waterbath,
connect the air flow system to the chimney, and purge the
system with air for 15 min (Warning—see 5.5.)At the end of
the purging period, turn off the air flow, close the absorbers,
and remove them from the train. Allow the absorbers to reach
room temperature, gently wipe each with a lint-free dry cloth,
and place them beside the balance case for 30 min or more.
NOTE 1—In the case of those dimensions for which no specific Open the absorbers for a moment to equalize the pressure,
tolerances are designated above, the permissible variation is 610%tothe
close, and weigh to the nearest 1 mg.
nearest 1 mm, provided, however, that in no case shall the deviation be
8.2 While the absorbers are standing, the lamp may be
greater than 5 mm.
prepared. Thread the burner with the proper number of wick
FIG. 1 Lamp and Chimney
strands (see Note 3) by drawing the strand through the burner
tube with a small metal hook. Trim the wick as closely as
anhydrous calcium sulfate and phosphorus pentoxide in that
possible to the top of the burner, and draw the trimmed wick
order. A length of rubber tubing suitable for connection to the
down until it is flush with or slightly below the top of the
inlet tube of the burner shall be connected to the exit of the
burner. Pipet approximately 5 mL of test specimen into the
tower.
burner flask, and insert the prepared burner into the flask. Cap
5.6 Drying Tube—A small U-tube containing anhydrous
the burner with its glass cap, and close the burner air inlet with
calcium sulfate.
a rubber policeman. Allow the sample to rise by capillary
5.7 Ice-Water Bath, large enough to hold the two absorbers
action to the top of the wick.
in tandem, immersed to a depth of approximately 5 cm.
NOTE 3—The burning characteristics of the flame are dependent upon
the flow of air to the burner, the volatility of the test specimen, the
6. Reagents and Materials
tightness of the wick in the burner tube, and the position of the wick
6.1 Purity of Reagents—Reagent grade chemicals shall be
relative to the top of the burner. The latter two factors can be established
used in all tests. Unless otherwise indicated, it is intended that
before an actual determination is made so that the flame can be controlled
by the rate of air flow.Atightly fitting wick is required for highly volatile
all reagents conform to the specifications of the Committee on
Analytical Reagents of the American Chemical Society where
Reagent Chemicals, American Chemical Society Specifications, American
The sole source of supply of the apparatus known to the committee at this time Chemical Society, Washington, DC. For suggestions on
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