Standard Practice for Solvent Extraction of Total Petroleum Hydrocarbons from Soils and Sediments Using Closed Vessel Microwave Heating

SCOPE
1.1 This practice covers the solvent extraction of total petroleum hydrocarbon (TPH) from soils and sediments, using closed vessel microwave heating, for subsequent determination by gravimetric or gas chromatographic techniques.  
1.2 This practice is recommended only for solid samples that can pass through a ten mesh screen (approximately 2-mm openings).  
1.3 The solvent extract obtained by this practice may be analyzed for total or specific nonvolatile and semivolatile petroleum hydrocarbons but may require sample clean-up procedures prior to specific compound analysis.  
1.4 This practice is limited to solvents that are recommended for use in microwave solvent extraction systems.  
1.5 The values stated in pounds per square inch (psi) are to be regarded as the standard. The SI units given in parentheses are for information only.  
1.6 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. Specific hazard statements are given in Section 8.

General Information

Status
Historical
Publication Date
31-Dec-2000
Current Stage
Ref Project

Relations

Buy Standard

Standard
ASTM D5765-95(2001) - Standard Practice for Solvent Extraction of Total Petroleum Hydrocarbons from Soils and Sediments Using Closed Vessel Microwave Heating
English language
3 pages
sale 15% off
Preview
sale 15% off
Preview

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation:D 5765–95 (Reapproved 2001)
Standard Practice for
Solvent Extraction of Total Petroleum Hydrocarbons from
Soils and Sediments Using Closed Vessel Microwave
Heating
This standard is issued under the fixed designation D 5765; 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 Total Solvent Extractable Content (TSEC) of Solid Waste
Samples
1.1 This practice covers the solvent extraction of total
2.2 Federal Standard:
petroleum hydrocarbon (TPH) from soils and sediments, using
Code of Federal Regulations, Title 21, Part 1030, and Title
closedvesselmicrowaveheating,forsubsequentdetermination
47, Part 18
by gravimetric or gas chromatographic techniques.
1.2 This practice is recommended only for solid samples
3. Summary of Practice
that can pass through a ten mesh screen (approximately 2-mm
3.1 The chemical portion of this practice involves solvent
openings).
extraction to dissociate petroleum hydrocarbons from the
1.3 The solvent extract obtained by this practice may be
matrix.
analyzed for total or specific nonvolatile and semivolatile
3.2 The sample is extracted with acetone/hexane in a sealed
petroleum hydrocarbons but may require sample clean-up
microwave transparent vessel using microwave heating to an
procedures prior to specific compound analysis.
internal temperature of 150°C.
1.4 This practice is limited to solvents that are recom-
3.3 This practice provides a sample suitable for analysis by
mended for use in microwave solvent extraction systems.
gas chromatography or gravimetric measurements.
1.5 The values stated in pounds per square inch (psi) are to
be regarded as the standard. The SI units given in parentheses
4. Significance and Use
are for information only.
4.1 Solvent extraction of soils and sediments can provide
1.6 This standard does not purport to address all of the
information on the availability of petroleum hydrocarbons to
safety concerns, if any, associated with its use. It is the
leaching, water quality changes, or other site conditions.
responsibility of the user of this standard to establish appro-
4.2 Rapid heating, in combination with temperatures in
priate safety and health practices and determine the applica-
excess of the atmospheric boiling point of acetone/hexane,
bility of regulatory limitations prior to use. Specific hazard
reduces sample preparation or extraction times.
statements are given in Section 8.
4.3 Reduced amounts of solvents are required and solvent
loss due to boiling and evaporation are eliminated by use of
2. Referenced Documents
closed extraction vessels.
2.1 ASTM Standards:
D 3694 Practices for Preparation of Sample Containers and
5. Interferences
for Preservation of Organic Constituents
5.1 No interferences to the extraction of soils and sediments
D 3856 Guide for Good Laboratory Practices in Laborato-
using microwave heating have been observed.
ries Engaged in Sampling and Analysis of Water
5.2 Precautions should be exercised to avoid those interfer-
D 3974 Practice for Extraction of Trace Elements from
2 ences normally associated with the final determination of total
Sediments
petroleum hydrocarbons using gas chromatography or gravi-
D 3976 Practice for Preparation of Sediment Samples for
2 metric techniques.
Chemical Analysis
D 5368 Test Method for the Gravimetric Determination of
6. Apparatus
6.1 Microwave Heating System—A laboratory microwave
heating system capable of delivering a minimum of 900 W of
This practice is under the jurisdiction ofASTM Committee D-19 on Water and
microwave energy. The system should be capable of 1 %
is the direct responsibility of Subcommittee D19.07 on Sediments, Geomorphology,
and Open-Channel Flow.
Current edition approved Aug. 15, 1995. Published October 1995.
2 4
Annual Book of ASTM Standards, Vol 11.02. Annual Book of ASTM Standards, Vol 11.04.
3 5
Annual Book of ASTM Standards, Vol 11.01. Available from the U.S. Government Printing Office, Washington, DC.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 5765–95 (2001)
power adjustments and 1-s time adjustment. The microwave 8. Hazards
cavity should be constructed so as to prevent any possible
8.1 Themicrowavesystemshallbeoperatedandmaintained
metal to metal arcing from occurring within the cavity. The
in accordance with the manufacturer’s recommended safety
oven cavity should be equipped with an exhaust ventilation
precautions.
sufficient to provide ten chamber exchanges per minute. The
8.2 The extraction vessels shall be used and maintained in
ventilation exhaust should contain a solvent sensor capable of
accordance with the manufacturer’s recommended safety pre-
detecting solvent concentrations below their lower explosive
cautions.
limits and shutting the microwave source off. The cavity shall
8.3 Use only microwave systems and vessels approved for
have a 360° oscillating turntable to ensure even sample
solvent use.
heating, and be capable of removing contained vessel vented
solvents. Safety interlocks, to shut off magnetron power output
9. Sampling
shall be contained in the cavity door opening mechanism. The
9.1 Collect a soil or sediment sample using an appropriate
system shall comply with Department of Health and Human
sampling technique.
ServicesStandardsundertheCodeofFederalRegulations,Part
9.2 Prepare the soil or sediment sample in accordance with
1030.10, Subparts (c) (1), (c) (2), and (c)
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.