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A method for the detection of total petroleum hydrocarbons in soil and sediment c 10 ~c 40 Methods

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

Active Publication Date: 2022-07-19
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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  • A method for the detection of total petroleum hydrocarbons in soil and sediment c <sub>10</sub> ~c <sub>40</sub> Methods
  • A method for the detection of total petroleum hydrocarbons in soil and sediment c <sub>10</sub> ~c <sub>40</sub> Methods
  • A method for the detection of total petroleum hydrocarbons in soil and sediment c <sub>10</sub> ~c <sub>40</sub> Methods

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Embodiment 1

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

[0032] Apparatus: ASE350 accelerated solvent extraction apparatus (Thermofisher, USA); gas chromatograph (Agilent, USA); rotary evaporator; nitrogen blower; low temperature freeze dryer.

[0033] Reagent: Florisil (60-100 mesh); n-hexane (pesticide grade). Petroleum hydrocarbons (C 10 ~C 40 ) standard solution (AccuStandard, USA), petroleum hydrocarbon soil standard material (NSIlab, USA)

[0034] A method for the detection of petroleum hydrocarbons (C 10 ~C 40 ) analysis method, which specifically includes the following steps:

[0035] (1) Preparation of soil and sediment samples: The collected soil and sediment samples were immediately frozen at -18°C to 20°...

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Abstract

The invention discloses a method for detecting total petroleum hydrocarbon C in soil and sediment 10 ~C 40 Method for Total Petroleum Hydrocarbons C in Soils and Sediments 10 ~C 40 After extraction, online purification, concentration and constant volume, it was detected by gas chromatograph with hydrogen flame ionization detector, qualitatively determined according to the retention time window, and quantified by external standard method. The adsorbent material filled in the extraction tank of the present invention is Florisil, which can be extracted by n-hexane or n-hexane-acetone without being adsorbed by magnesium silicate, and the sample and adsorbent are mixed and an accelerated solvent for online purification is used The extraction method and the purification process are all completed in the closed system of the extraction tank, and the sample and the adsorbent are directly mixed evenly. Compared with other purification methods, there is no need to fill the adsorbent and sample in layers, avoiding the addition of additional fiber membranes, and reducing the number of operation steps. , to avoid the loss caused by multiple transfers in the extraction liquid purification process, reduce the use of organic solvents, and improve the sample recovery rate.

Description

technical field [0001] The invention relates to the field of analytical chemistry, in particular to a method for detecting total petroleum hydrocarbon C in soil and sediments 10 ~C 40 Methods. Background technique [0002] Oil is one of the main fossil fuels, which inevitably pollutes the soil in the process of mining, transportation, processing and use. When the degree and speed of pollution exceed the self-purification capacity of the soil, it will lead to the normal function of the soil environment and the decline of soil quality. , and ultimately affect human health through the food chain. Accurate determination of total petroleum hydrocarbons in soil is of great significance for controlling environmental pollution and providing basic data for soil remediation. [0003] Total petroleum hydrocarbons (C 10 ~C 40 ) was determined by gas chromatography, and the pretreatment methods included ultrasonic extraction, rapid solvent extraction, Soxhlet extraction, and vibrati...

Claims

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Application Information

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Patent Type & Authority Patents(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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