ASTM D7679 TPH DRO GRO by GC MS Test in Water
The ASTM D7679 Total Petroleum Hydrocarbon (TPH) Determination by Dissolved, Refractory and Organic Oil (DRO-GRO) method using Gas Chromatography-Mass Spectrometry (GC-MS) is a cutting-edge analytical technique used to measure the presence of petroleum hydrocarbons in water samples. This test is particularly valuable for assessing contamination levels from oil spills, industrial discharges, or accidental releases into aquatic environments.
The DRO-GRO method distinguishes between different types of hydrocarbons—dissolved (D), refractory organic (RO), and organic oil (GO)—which allows for a more precise quantification of the petroleum components in water. Dissolved hydrocarbons are those that can be extracted by common solvents, while refractory organic hydrocarbons resist such extraction methods. Organic oils represent the most persistent and potentially hazardous components.
The GC-MS technology behind this test provides high sensitivity and specificity, enabling accurate detection even at very low concentrations. This makes it an indispensable tool for regulatory compliance, environmental monitoring, and research in water quality assessment.
When conducting ASTM D7679 testing, the sample preparation is critical. Typically, a known volume of water is collected and filtered to remove particulate matter. The filtrate is then analyzed using GC-MS according to the specified method parameters. This ensures that only dissolved and refractory hydrocarbons are measured.
The test results are reported in milligrams per liter (mg/L) for each fraction—D, RO, and GO—and a total TPH value is provided as well. Compliance with environmental regulations often requires reporting these values to regulatory bodies like the Environmental Protection Agency (EPA).
In real-world applications, ASTM D7679 is used in various sectors such as oil and gas exploration, petrochemical industries, wastewater treatment facilities, and government agencies responsible for environmental protection. The test helps ensure that water quality standards are met, thereby protecting both human health and aquatic ecosystems.
| Standard | Title | Year |
|---|---|---|
| ASTM D7679-18 | Total Petroleum Hydrocarbon (TPH) Determination by Dissolved, Refractory and Organic Oil (DRO-GRO) Method Using Gas Chromatography-Mass Spectrometry (GC-MS) | 2018 |
Applied Standards
The ASTM D7679 Total Petroleum Hydrocarbon Determination by Dissolved, Refractory and Organic Oil (DRO-GRO) method using Gas Chromatography-Mass Spectrometry (GC-MS) is rigorously defined in the standard published by ASTM International. This standard specifies the procedure for measuring total petroleum hydrocarbons dissolved, refractory organic, and organic oil fractions in water.
The standard ensures consistency across laboratories performing this test, thereby facilitating accurate comparison of results between different testing facilities. Compliance with ASTM D7679 is essential for ensuring that the data generated from these tests meets regulatory requirements and industry standards.
Why Choose This Test
- High sensitivity and specificity, allowing detection of hydrocarbons even at low concentrations.
- Precise separation of petroleum hydrocarbon fractions into dissolved (D), refractory organic (RO), and organic oil (GO) components.
- Comprehensive reporting of total TPH values for regulatory compliance.
- Accurate quantification aiding in environmental impact assessment and remediation planning.
Quality and Reliability Assurance
The ASTM D7679 TPH DRO-GRO by GC-MS test is conducted under strict quality control measures to ensure reliability and accuracy. Our laboratory adheres to the highest standards of ISO/IEC 17025 accreditation, ensuring that all testing processes meet international best practices.
We employ skilled analysts with extensive experience in environmental analysis using advanced GC-MS technology. Our state-of-the-art facilities provide a controlled environment for sample preparation and analysis, minimizing the risk of contamination or error. Regular calibration of instruments ensures consistent and reliable results across tests.
Our commitment to quality extends beyond just instrumentation; we also maintain comprehensive documentation of all test procedures and results, ensuring traceability and transparency in our reporting process. This approach not only enhances trust but also supports effective decision-making for stakeholders involved in water quality management.
