Preparation method of oil-containing soil sample

Abstract

The invention belongs to the technical field of spectral soil detection, and particularly relates to a preparation method of an oil-containing soil sample. According to the preparation method, crude oil can be uniformly distributed in the soil sample, and the consistency of the oil-containing soil sample is ensured. The preparation method of the oil-containing soil sample for spectrum detection comprises the following steps: drying soil, crushing and sieving to obtain a dry and pure soil sample; weighing quantitative crude oil; adding a chloroform solvent to form an oil-containing mixture; adding the mixture into the soil sample to form a soil mixture containing oil and chloroform; and introducing nitrogen or dry air to remove water and concentrating to dry the sample, standing and reacting in a drying oven, cooling in a dryer and the like.

Description

technical field [0001] The invention belongs to the technical field of spectral soil detection, and in particular relates to a method for preparing an oily soil sample. Background technique [0002] As a commonly used soil oil detection method, spectral detection technology measures the spectral characteristics of oily soil by making a linear regression curve on the oily soil in the target area, and finally determines the content of petroleum pollutants in the soil. In order to ensure the accuracy of spectral detection, it is first necessary to establish a standard oil-bearing soil sample in the preparation stage of spectral detection. However, the inventors found that in the oily soil samples, due to the certain viscosity of the crude oil, the dispersion of the crude oil into the soil is often very uneven. The existing technology of thoroughly mixing crude oil and soil by grinding with a mortar is only suitable for the mixing process of high concentration containing soil s...

AI Technical Summary

Problems solved by technology

However, the inventors have found that in the oily soil samples, due to the certain viscosity of crude oil, the dispersion of the crude oil in the soil is often very uneven.

The existing technology of mixing crude oil with soil by grinding with a mortar is only suitable for the mixing process of high concentration containing soil samples

However, for oil-bearing soil samples with a volume ratio of crude oil to soil < 0.25, the existing technology cannot ensure that the crude oil is evenly dispersed in the soil.