Ultraviolet spectrophotometry of content of petroleum in soil

A determination method and spectrophotometric technology, applied in the measurement of color/spectral characteristics, etc., can solve the problems of different petroleum compositions, different measurement results and actual results, etc.
CN101776590AInactive Publication Date: 2010-07-14OCEAN UNIV OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
OCEAN UNIV OF CHINA
Publication Date
2010-07-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an ultraviolet spectrophotometry of the content of petroleum in soil. The method comprises the following steps: 1. preparing standard petroleum; 2. preparing purified petroleum ether; 3. weighting 15-25g of fresh soil in a beaker, adding 0.5-0.7ml of hydrochloric acid (1:1) for acidification, mixing, then adding 20-30g of a dry sample of MgSO4.H2O, then performing Soxhlet extraction with chloroform, after reflux, reclaiming chloroform, wherein residue is used as a standby for ultraviolet measurement; 4. weighting 5-10ml of petroleum ether to dissolve the residue, using petroleum ether as reference to place in a quartz cuvette, using a ultraviolet spectrometer to scan within 201-270mm, quantitatively comparing the absorbance of petroleum ether in 256nm of wavelength with that of the standard series of residual petroleum to calculate the content of petroleum; 5. drawing a standard curve; and 6. calculating the petroleum content of soil. The method of the invention avoids the influence of solid-phase differentiation on the measurement result of petroleum so that all the petroleum test data have comparability and the test accuracy is increased.
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Description

technical field

[0001] The invention relates to a method for analyzing oil content in soil environment, in particular to an ultraviolet spectrophotometric method for measuring oil content in soil. Background technique

[0002] Traditionally, crude oil and petroleum products are collectively referred to as petroleum. In terms of material composition, petroleum mainly refers to hydrocarbons composed of alkanes, naphthenes and aromatic hydrocarbons. However, in oil-contaminated soil and water, in addition to petroleum hydrocarbons, it also contains non-hydrocarbon components such as animal and vegetable oils, surfactants, and other organic substances, and under certain conditions, these non-hydrocarbon oils and petroleum hydrocarbons will be organically absorbed together. Solvents are extracted from soil or water, requiring a revision of the theoretical concept of petroleum. Therefore, the "extraction of a certain organic solvent from different oily media" is called petroleum,...

Claims

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