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.
The standard ASTM D8193 offers a modern alterative for oil in water testing employing IR spectroscopy an eco-friendly solvent.
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