Method for detecting total petroleum hydrocarbon C10-C40 in soil and sediments

A technology for total petroleum hydrocarbons and sediments, applied in the field of analytical chemistry, can solve the problems of cumbersome operation and time-consuming, and achieve the effect of ensuring accuracy and reliability

Active Publication Date: 2020-08-11
ZHEJIANG INST OF GEOLOGY & MINERAL RESOURCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the online purification technology in the prior art needs to layer and compact the adsorbent, which also has the problems of cumbersome operation and long time-consuming

Method used

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  • Method for detecting total petroleum hydrocarbon C10-C40 in soil and sediments
  • Method for detecting total petroleum hydrocarbon C10-C40 in soil and sediments
  • Method for detecting total petroleum hydrocarbon C10-C40 in soil and sediments

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Embodiment 1

[0031] The invention provides a method of accelerated solvent extraction-sample adsorbent mixing-on-line purification-gas chromatography to detect total petroleum hydrocarbons (C 10 ~C 40 ) analysis method can be used for petroleum hydrocarbons in soil and sediment (C 10 ~C 40 ) content was analyzed using the following instruments and reagents:

[0032] Instruments: ASE350 Accelerated Solvent Extractor (Thermofisher, USA); Gas Chromatograph (Agilent, USA); Rotary Evaporator; Nitrogen Blowing Apparatus; Low Temperature Freeze Dryer.

[0033] Reagent: florisil (60-100 mesh); n-hexane (pesticide residue grade). Petroleum Hydrocarbons (C 10 ~C 40 ) standard solution (AccuStandard company, the U.S.), petroleum hydrocarbon soil standard substance (NSIlab company, the U.S.)

[0034] An accelerated solvent extraction-sample adsorbent mixing-on-line purification-gas chromatography detection of petroleum hydrocarbons (C 10 ~C 40 ) analysis method, specifically comprising the fol...

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Abstract

The invention discloses a method for detecting total petroleum hydrocarbon C10-C40 in soil and sediments, which comprises the following steps of extracting, purifying on line, concentrating, fixing the volume of the total petroleum hydrocarbon C10-C40 in the soil and sediments, detecting by using a gas chromatograph with a hydrogen flame ionization detector, determining the nature according to a retention time window, and quantifying by using an external standard method. The adsorption material filled in the extraction tank is Florisil, which can be extracted by n-hexane or n-hexane-acetone and is not adsorbed by magnesium silicate; a sample and adsorbent uniform mixing-online purification accelerated solvent extraction method is adopted; the purification process is completed in a closed system of the extraction tank; the sample and the adsorbent are directly and uniformly mixed; compared with other purification methods, the method has the advantages that the adsorbent and the sample do not need to be filled in a layered manner, extra addition of a fiber filter membrane is avoided, operation steps are reduced, loss caused by repeated transfer in the extracting solution purificationprocess is avoided, the use amount of an organic solvent is reduced, and the sample recovery rate is increased.

Description

technical field [0001] The invention relates to the field of analytical chemistry, in particular to a method for detecting total petroleum hydrocarbons C in soil and sediment 10 ~C 40 Methods. Background technique [0002] Petroleum is one of the main fossil fuels. It will inevitably pollute the soil during mining, transportation, processing and use. When the degree and speed of pollution exceed the self-purification ability of the soil, it will lead to the normal dysfunction of the soil environment and the decline of soil quality. , and ultimately affect human health through the food chain. Accurate determination of total petroleum hydrocarbon content in soil is of great significance for controlling environmental pollution and providing basic data for soil remediation. [0003] The total petroleum hydrocarbons in the soil (C 10 ~C 40 ) is determined by gas chromatography, and the pretreatment methods include ultrasonic extraction, fast solvent extraction, Soxhlet extra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/14G01N30/04G01N30/12G01N30/68G01N30/88
CPCG01N30/02G01N30/06G01N30/14G01N30/04G01N30/12G01N30/68G01N30/88G01N2030/062G01N2030/047G01N2030/146G01N2030/126G01N2030/065G01N2030/8854
Inventor 石银俊龚祖星吴述超曹攽
Owner ZHEJIANG INST OF GEOLOGY & MINERAL RESOURCE
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