Novel method for determining petroleum in reclaimed land sample

Abstract

The invention belongs to the technical field of determination of petroleum in a soil sample, and discloses a method for determining petroleum in a reclaimed land sample by accelerated solvent extraction-fluorescence spectrophotometry. The method comprises the following steps: petroleum components in a soil sample are extracted, concentrated and purified by an accelerated solvent extractor to obtain a to-be-determined extracting solution; and the to-be-determined extracting solution is excited at fixed excitation wavelength and the fluorescence intensity is determined, and the concentration ofpetroleum in the soil sample is calculated by using a standard working curve. According to the method, the accelerated solvent extractor is adopted for extracting the soil sample, petroleum componentsin the sample are extracted, the solvent consumption is small, the extraction efficiency is high, and the instrument is automatic. The determination based on fluorescence spectrophotometry is accurate, simple and convenient. The analysis and test efficiency is greatly improved while the accuracy and reliability of the test result are ensured.

Description

technical field [0001] The invention belongs to the technical field of extraction, purification and determination of petroleum in soil samples, and in particular relates to an accelerated solvent extraction-fluorescence spectrophotometry method for measuring petroleum in reclaimed land samples. Background technique [0002] Currently, the closest prior art: [0003] With the extensive exploitation and widespread use of petroleum, the pollution of petroleum to soil has become a more and more serious problem. In order to judge whether the soil is polluted by petroleum and determine its content, it is necessary to establish a method for pretreatment and instrumental analysis of petroleum in soil. [0004] At present, there are several extraction methods for organic matter in soil: vibration extraction method, low extraction efficiency, large amount of solvent used; Soxhlet extraction method, heating in water bath, long extraction time, up to 12-18 hours, large amount of solven...

AI Technical Summary

Problems solved by technology

[0007] (1) In the prior art, the pretreatment method that is convenient for subsequent concentration and purification uses a large amount of solvent and low extraction efficiency

[0008] (2) Can not objectively reflect the petroleum content in the sample; and in the extraction and determination of the existing technology, it is greatly affected by the environment, the precision is low, the data calculation is complicated, and the operation is cumbersome, so it is not easy to popularize

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