Component separating and determining method of total petroleum hydrocarbons in soil

Abstract

The invention discloses a component separating and determining method of total petroleum hydrocarbons in soil. The method comprises a step of extracting a soil sample into an organic solvent by accelerated solvent extraction and concentrating an extraction liquor after extraction is completed, a step of filling a chromatographic column with aluminium oxide, allowing the concentrated extraction liquor to flow through the chromatographic column, eluting and collecting aliphatic hydrocarbons and aromatic hydrocarbons in the chromatographic column with n-hexane and dichloromethane, and a step of concentrating aliphatic hydrocarbon and aromatic hydrocarbon collection fluids, allowing the concentrated aliphatic hydrocarbon and aromatic hydrocarbon collection fluids to enter a gas chromatographyanalyzer to obtain the concentrations of the aliphatic hydrocarbons and the aromatic hydrocarbons in the total petroleum hydrocarbons. The method is simple to operate, the separation and determinationof the aliphatic hydrocarbons and the aromatic hydrocarbons in the total petroleum hydrocarbons are realized, the judgment of the degree of damage of the total petroleum hydrocarbons in the soil is facilitated, the environmental pollution is avoided, and the human health is ensured.

Description

technical field [0001] The invention relates to the technical field of analysis and testing, in particular to a component separation and determination method for total petroleum hydrocarbons in soil. Background technique [0002] Petroleum hydrocarbons are one of the organic pollutants widely present in the environment, including gasoline, kerosene, diesel oil, lubricating oil, paraffin, and asphalt, etc. Other organic substances, such as mixtures of sulfides, nitrides, naphthenic acids, etc. With the development of the economy, the human demand for energy continues to expand, and oil has become one of the most important energy sources for human beings. In the process of oil extraction, processing and utilization, more and more oil may enter the soil environment and the ocean, causing pollution and damage to the soil environment and ocean water quality. Once the excessive total petroleum hydrocarbons enter the soil, it will be difficult to get rid of them. It will cause se...

AI Technical Summary

Problems solved by technology

[0003] At present, the detection of total petroleum hydrocarbons in soil is mainly based on EPA 8015C 2007 gas chromatography to determine the total amount of total petroleum hydrocarbons, but this method cannot determine the composition of total petroleum hydrocarbons, and the composition of total petroleum hydrocarbons includes aliphatic hydrocarbons and aromatic hydrocarbons There are obvious differences in toxicity and hazard degree, so it is of great significance for the separation and determination of aliphatic hydrocarbons and aromatic hydrocarbons in total petroleum hydrocarbons