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.
Get more information about the standard at ASTM D7678-17(2022).
ASTM D7678 is a standard test method for determining Total Oil and Grease (TOG) and Total Petroleum Hydrocarbons (TPH) in water and wastewater. This method employs solvent extraction followed by mid-infrared (mid-IR) laser spectroscopy to accurately measure these contaminants, ensuring environmental compliance and water quality monitoring.
Details
The ASTM D7678 test method covers the determination of TOG and TPH in water and wastewater samples. It involves extracting the analytes from an acidified sample using a cyclic aliphatic hydrocarbon solvent, such as cyclohexane or cyclopentane. The extracted substances are then measured by mid-IR laser spectroscopy in the region of 1370 cm⁻¹ to 1380 cm⁻¹ (7.25 µm to 7.30 µm). Polar substances are removed through cleanup with Florisil to ensure accurate measurement of non-polar hydrocarbons.
Industries and Applications
ASTM D7678 is widely applied in various industries and applications, including:
- Environmental Monitoring Agencies: Utilize this method to assess water bodies for contamination, ensuring compliance with environmental regulations and safeguarding aquatic ecosystems
- Wastewater treatment plants: Implement this standard to monitor and control the levels of oil and grease in effluents, optimizing treatment processes and preventing environmental pollution
- Petrochemical industry: Employ this test method to detect and quantify petroleum hydrocarbon contamination in water, aiding in spill response and remediation efforts
- Manufacturing sector: Use this standard to monitor wastewater discharge for oil and grease content, ensuring adherence to environmental standards and avoiding potential fines
- Analytical laboratories: Offer testing services based on ASTM D7678 to clients across various industries, providing accurate measurements of TOG and TPH in water samples