ASTM D7678-11
(Terminology)Standard Test Method for Total Petroleum Hydrocarbons (TPH) in Water and Wastewater with Solvent Extraction using Mid-IR Laser Spectroscopy
Standard Test Method for Total Petroleum Hydrocarbons (TPH) in Water and Wastewater with Solvent Extraction using Mid-IR Laser Spectroscopy
SIGNIFICANCE AND USE
The presence and concentration of total petroleum hydrocarbons, as well as oil and grease, in domestic and industrial wastewater is of concern to the public because of its deleterious aesthetic effect and its impact on aquatic life.
Regulations and standards have been established that require monitoring of total petroleum hydrocarbons as well as oil and grease in water and wastewater.
SCOPE
1.1 This test method covers the determination of total petroleum hydrocarbons (TPH) in water, and waste water, that are extractable from an acidified sample with a cyclic aliphatic hydrocarbon (for example cyclohexane), and measured by IR absorption in the region of 1370 -1380 cm-1 (7.25 -7.30 microns). Polar substances are removed by clean-up with Florisil.
1.2 The method also considers the volatile fraction of petroleum hydrocarbons which is lost by gravimetric methods that require solvent evaporation prior to weighing, as well as by solventless IR methods that require drying of the employed solid phase material prior to measurement. Similarly, a more complete fraction of extracted petroleum hydrocarbon is accessible by this method as compared to GC methods that use a time window for quantification, as petroleum hydrocarbons eluting outside these windows are also quantified.
1.3 This method defines oil and grease in water and wastewater as that which is extractable in the test method and measured by IR absorption in the region of 1370-1380 cm-1
(7.25 – 7.30 microns).
1.4 This method covers the range of 0.5 to 1000 mg/L and may be extended to a lower or higher level by extraction of a larger or smaller sample volume collected separately.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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.
General Information
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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: D7678 − 11
Standard Test Method for
Total Petroleum Hydrocarbons (TPH) in Water and
Wastewater with Solvent Extraction using Mid-IR Laser
1
Spectroscopy
This standard is issued under the fixed designation D7678; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This test method covers the determination of total
D1129Terminology Relating to Water
petroleum hydrocarbons (TPH) in water, and waste water, that
D1141Practice for the Preparation of Substitute Ocean
areextractablefromanacidifiedsamplewithacyclicaliphatic
Water
hydrocarbon (for example cyclohexane), and measured by IR
-1
D1193Specification for Reagent Water
absorption in the region of 1370 -1380 cm (7.25 -7.30
D1192Guide for Equipment for Sampling Water and Steam
microns). Polar substances are removed by clean-up with
3
in Closed Conduits (Withdrawn 2003)
Florisil.
D2777Practice for Determination of Precision and Bias of
1.2 The method also considers the volatile fraction of
Applicable Test Methods of Committee D19 on Water
petroleum hydrocarbons which is lost by gravimetric methods
D3370Practices for Sampling Water from Closed Conduits
that require solvent evaporation prior to weighing, as well as
D3921Test Method For Oil and Grease and Petroleum
by solventless IR methods that require drying of the employed
Hydrocarbons in Water
solid phase material prior to measurement. Similarly, a more
D5847Practice for Writing Quality Control Specifications
complete fraction of extracted petroleum hydrocarbon is ac-
for Standard Test Methods for Water Analysis
cessible by this method as compared to GC methods that use a
D7575Test Method for Solvent-Free Membrane Recover-
time window for quantification, as petroleum hydrocarbons
able Oil and Grease by Infrared Determination
eluting outside these windows are also quantified.
E168Practices for General Techniques of Infrared Quanti-
tative Analysis
1.3 This method defines oil and grease in water and waste-
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2.2 ISO Standards:
water as that which is extractable in the test method and
-1
ISO 9377-2Determination of Hydrocarbon Oil Index
measured by IR absorption in the region of 1370-1380 cm
(7.25 – 7.30 microns).
3. Terminology
1.4 This method covers the range of 0.5 to 1000 mg/L and 3.1 Definitions—For definitions of terms used in this test
may be extended to a lower or higher level by extraction of a
method, refer to Terminology D1129 and Practices E168.
larger or smaller sample volume collected separately.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 Totalpetroleumhydrocarbons(TPH),n—theextracted
1.5 The values stated in SI units are to be regarded as
material which remains in the solvent after treatment with
standard. No other units of measurement are included in this
Na SO and Florisil.
standard.
2 4
1.6 This standard does not purport to address all of the 4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 An acidified 900 mL sample of water or wastewater is
responsibility of the user of this standard to establish appro-
extracted with 50 mL of cyclohexane. The extract is treated
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2
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.
1 3
This test method is under the jurisdiction ofASTM Committee D19 on Water The last approved version of this historical standard is referenced on
andisthedirectresponsibilityofSubcommitteeD19.06onMethodsforAnalysisfor www.astm.org.
4
Organic Substances in Water. Available from International Organization for Standardization (ISO), 1, ch. de
Current edition approved Feb. 1, 2011. Published March 2011. DOI: 10.1520/ la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http://
D7678-11. www.iso.ch.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7678 − 11
with sodium sulfate and Florisil to remove traces of water, as 7.7 Glass bottle 50-100 mL with glass or fluoropolymer
wellaspolarsubstances,therebyproducingasolutioncontain- stopper or crimped cap with lined PTFE septum.
ing nonpolar material. The nonpolar material is referred to as
7.8 Magnetic stirrer, with PTFE-fluorocarbon stirring bar.
total petroleum hydrocarbons (TPH) and is meas
...
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