Determination of Hydrocarbon Fat Index: Measurement Methods in Water and Wastewater
TS EN ISO 9377-2: Water quality - Determination of hydrocarbon oil index - Part 2: Solvent extraction and gas chromatography method
What is the Hydrocarbon Oil Index?
The hydrocarbon oil index generally refers to the total concentration of mineral oils, petroleum derivatives and other hydrocarbons in water. This index is an important parameter in the protection of the environment and water resources.
What are the Sources of Hydrocarbon Oil?
- Industrial Wastes: Oil refineries, chemical plants and metal processing industries.
- Maritime and Transportation: Ship fuel spills and marine pollution.
- Domestic Wastes: Pollution from domestic use of oil-based products.
- Natural Resources: Crude oil spills or biodegradation of organic matter.
Why is the Determination of Hydrocarbon Oil Index Important?
- Water Quality Monitoring: To determine whether the water meets the drinking water standard.
- Environmental Protection: To monitor oil pollution in seas, lakes and rivers.
- Legal Regulations: Compliance with limit values set for water pollution control.
- Waste Management: To evaluate the efficiency of industrial and urban wastewater treatment processes.
What is TS EN ISO 9377-2 Standard?
TS EN ISO 9377-2 is an international standard for the determination of hydrocarbon oil index in water and wastewater. The standard is based on the "Determination of Hydrocarbons by Gas Chromatography ” method and provides quantitative analysis of petroleum-derived compounds.
Within the scope of the ISO 9377 standard, 2 different methods are used:
- Part 1: Method using solvent extraction and gravimetry
- Part 2: Method using solvent extraction and gas chromatography
What are the Basic Principles in the Standard?
- Extraction Hydrocarbons are separated from the water sample using an organic solvent.
- Chromatographic Analysis: The separated compounds are measured by gas chromatography (GC).
- Reporting of Results: The concentration of hydrocarbons between C10 and C40 is calculated.
Measurement Methods of Hydrocarbon Fat Index
- TS EN ISO 9377-2 Method: Hydrocarbons are separated from water using organic solvent (e.g. n-hexane). Hydrocarbons in the C10-C40 range are analyzed by gas chromatography.
- Spectrophotometric Methods: Hydrocarbons are analyzed according to their ultraviolet or infrared light absorption properties. Suitable for fast and simple screening analysis.
- Gravimetric Method: Hydrocarbons remaining after evaporation of the solvent are weighed. It is a simple method.
- FTIR (Fourier Transform Infrared Spectroscopy): Infrared spectrum properties of hydrocarbons are analyzed. Used in oil and grease analysis.
- HPLC (High Performance Liquid Chromatography): Based on the principle of separation of compounds in the liquid phase. Used for detailed analysis of hydrocarbon fractions.
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