ASTM D7678-17(2022)

Standard Test Method for Total Oil and Grease (TOG) and Total Petroleum Hydrocarbons (TPH) in Water and Wastewater with Solvent Extraction using Mid-IR Laser Spectroscopy

SIGNIFICANCE AND USE
5.1 The presence and concentration of total oil and grease as well as total petroleum hydrocoarbons, in domestic and industrial wastewater is of concern to the public because of its deleterious aesthetic effect and its impact on aquatic life.  
5.2 Regulations and standards have been established that require monitoring of total oil and grease as well as total petroleum hydrocarbons in water and wastewater.
SCOPE
1.1 This test method covers the determination of total oil and grease (TOG) and total petroleum hydrocarbons (TPH) in water and waste water that are extractable by this test method from an acidified sample with a cyclic aliphatic hydrocarbon (for example cyclohexane, cyclopentane) and measured by IR absorption in the region from 1370 cm–1 to 1380 cm–1 (7.25 μm to 7.30 μm) using a mid-IR laser spectrometer. Polar substances are removed by clean-up with Florisil.2  
1.2 This test 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 solvent-less IR methods that require drying of the employed solid phase material prior to measurement. Similarly, a more complete fraction of extracted petroleum hydrocarbons are accessible by this test method as compared to GC methods that use a time window for quantification, as petroleum hydrocarbons eluting outside these windows are quantified too.  
1.3 This test method covers the range of 0.1 mg/L 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.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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, health and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 14-Oct-2022
• ICS: 13.060.50 - Examination of water for chemical substances
• Technical Committee: D19 - Water
• Drafting Committee: D19.06 - Methods for Analysis for Organic Substances in Water

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7678 − 17 (Reapproved 2022)
Standard Test Method for
Total Oil and Grease (TOG) and Total Petroleum
Hydrocarbons (TPH) in Water and Wastewater with Solvent
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Extraction using Mid-IR Laser 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 ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This test method covers the determination of total oil
mendations issued by the World Trade Organization Technical
and grease (TOG) and total petroleum hydrocarbons (TPH) in
Barriers to Trade (TBT) Committee.
water and waste water that are extractable by this test method
from an acidified sample with a cyclic aliphatic hydrocarbon
2. Referenced Documents
(for example cyclohexane, cyclopentane) and measured by IR
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–1 –1
2.1 ASTM Standards:
absorption in the region from 1370 cm to 1380 cm (7.25
D1129Terminology Relating to Water
µm to 7.30 µm) using a mid-IR laser spectrometer. Polar
2
D1193Specification for Reagent Water
substances are removed by clean-up with Florisil.
D2777Practice for Determination of Precision and Bias of
1.2 This test 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 Flowing Process
that require solvent evaporation prior to weighing, as well as
Streams
bysolvent-lessIRmethodsthatrequiredryingoftheemployed
D3921Test Method For Oil and Grease and Petroleum
solid phase material prior to measurement. Similarly, a more
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Hydrocarbons in Water (Withdrawn 2013)
complete fraction of extracted petroleum hydrocarbons are
D5847Practice for Writing Quality Control Specifications
accessiblebythistestmethodascomparedtoGCmethodsthat
for Standard Test Methods for Water Analysis
use a time window for quantification, as petroleum hydrocar-
E168Practices for General Techniques of Infrared Quanti-
bons eluting outside these windows are quantified too.
tative Analysis
1.3 This test method covers the range of 0.1 mg/L to 1000
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2.2 ISO Standards:
mg/L and may be extended to a lower or higher level by
ISO 9377-2Determination of Hydrocarbon Oil Index
extraction of a larger or smaller sample volume collected
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2.3 Code of Federal Regulations (CFR) Publications:
separately.
40 CFR Part 136Guidelines Establishing Test Procedures
1.4 The values stated in SI units are to be regarded as
for the Analysis of Pollutants
standard. No other units of measurement are included in this
49 CFR Part 172 Hazardous Materials Table, Special
standard.
Provisions, Hazardous Materials Communications, Emer-
1.5 This standard does not purport to address all of the
gency Response Information,Training Requirements, and
safety concerns, if any, associated with its use. It is the
Security Plans
responsibility of the user of this standard to establish appro-
priate safety, health and environmental practices and deter-
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mine the applicability of regulatory limitations prior to use.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
1.6 This international standard was developed in accor-
Standards volume information, refer to the standard’s Document Summary page on
dance with internationally recognized principles on standard-
the ASTM website.
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The last approved version of this historical standard is referenced on
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This test method is under the jurisdiction ofASTM Committee D19 on Water www.astm.org.
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andisthedirectresponsibilityofSubcommitteeD19.06onMethodsforAnalysisfor Available from International Organization for Standardization (ISO), ISO
Organic Substances in Water. Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,
Current edition approved Oct. 15, 2022. Published October 2022. Originally Geneva, Switzerland, http://www.iso.org.
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approved in 2011. Last previous edition approved in 2017 as D7678 – 17. DOI: Available from U.S. Government Printing Office, Superintendent of
10.1520/D7678-17R22. Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
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Florisil is a trademark by U.S. Silica Company, Frederick, MD. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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