What does TEH mean in UNCLASSIFIED

Extractable hydrocarbons (TEH) are substances that can be removed from a solid or liquid sample using a solvent. These substances typically include petroleum-derived hydrocarbons, such as aromatic compounds, polycyclic aromatic hydrocarbons (PAHs), and volatile organic compounds (VOCs). TEH provide important information about the chemical composition of a sample and can be used to assess potential environmental contamination.

The most commonly used method for measuring TEH is gas chromatography/mass spectrometry (GC/MS). This technique involves running the samples through a gas chromatograph which separates the various components in the sample based on their boiling points. Then these separated components are detected by an MS detector.

Extractable hydrocarbons can be found in many different types of environmental samples including soil, sediment, air, water, and even food products. They can also be found in industrial processes or emissions from manufacturing facilities.

Extractable hydrocarbons provide an indication of potential contaminants present at an environment site. By analyzing a sample for TEH it is possible to detect trace levels of hazardous chemicals that may otherwise go undetected with other types of testing methods.

Yes, solvents used to extract TEH should always be handled with caution as they may contain toxic or flammable materials which can pose health risks if not handled correctly. It is important to make sure that proper safety protocols are followed when working with solvents and protective equipment should always be worn during extraction procedures.

No, it is not necessary to completely remove all TEH from a sample before analysis; however, if possible it is often beneficial to reduce concentrations prior to analysis in order to achieve more accurate readings. This can often require additional steps such as dilution or distillation in order to reduce concentration levels within acceptable ranges for analysis.

Yes, depending on where you are located various regulatory bodies may have specific requirements related to the sampling and testing for TEH in certain environments such as drinking water supplies or wastewater treatment plants. It is important to familiarize yourself with any applicable regulations prior to commencing any type of testing procedure.

The most common instrumentation utilized for analyzing TEH samples is a gas chromatograph/mass spectrometer (GC/MS) system due its accuracy and sensitivity when detecting trace amounts of these substances. Other techniques such as Headspace Gas Chromatography (HS GC) or High Resolution Gas Chromatography (HRGC) may also prove useful depending on what type of data needs studied.