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Method of analyzing rare earth element contents in crude oil by microwave digestion ICP-MS (Inductively coupled plasma mass spectrometry)

A technology of ICP-MS and microwave digestion, which is used in the analysis of materials, material analysis by electromagnetic means, and measurement devices. It can solve the problems of complicated pretreatment, time-consuming and laborious, and spectral interference, and achieve good repeatability and short digestion time. , the effect of impurity interference is small

Inactive Publication Date: 2019-12-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The sample pretreatment of the above method is relatively complicated, time-consuming and labor-intensive, and there are defects such as spectral interference or elemental interference.

Method used

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  • Method of analyzing rare earth element contents in crude oil by microwave digestion ICP-MS (Inductively coupled plasma mass spectrometry)

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0031] A method for microwave digestion ICP-MS analysis of rare earth element content in crude oil, the process is as follows figure 1 Shown; specifically include the following steps:

[0032] Step 1: Take 25mL Saudi crude oil sample, put it in a 200mL beaker, add 50mL chloroform to dissolve the sample, and make the sample completely dispersed.

[0033] Step 2: Configure the sample digestion solution;

[0034] Measure 0.5mL of chloroform-dissolved sample, put it in a 110mL polytetrafluoroethylene digestion tank, add 10mL of 68% nitric acid, close the lid, heat at 100°C and 0.6MPa for 12min, and then take out the digestion tank; After cooling to room temperature, add 2.5 mL of 30% H 2 o 2 , put the lid back on, heat at 150°C and 0.6MPa for 25min, then heat at 200°C and 0.8MPa for 25min; finally, heat at 250°C and 1.0MPa for 30min; after the d...

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Abstract

The invention discloses a method of analyzing rare earth element contents in crude oil by microwave digestion ICP-MS (Inductively coupled plasma mass spectrometry), and belongs to the field of detection of rare earth element contents in crude oil. The method specifically includes the following steps: using a dispersant to dissolve a crude oil sample to enable all components in the crude oil to beuniformly distributed; configuring a sample digestion solution; configuring a standard solution used for testing; configuring an internal standard solution; and detecting the contents of rare earth elements in the crude oil. The method uses the dispersant to dissolve the crude oil sample to enable all the components in the crude oil to be uniformly distributed, then completely digest the sample through a nitric acid-hydrogen peroxide digestion system under high temperature and high pressure, and has the characteristics of small reagent use amounts, short digestion time, low impurity interference, simple and convenient operation, good repeatability and the like.

Description

technical field [0001] The invention belongs to the field of rare earth element content detection in crude oil, and in particular relates to a microwave digestion ICP-MS method for analyzing the rare earth element content in crude oil. Background technique [0002] The main component of crude oil is organic substances, and there are also some inorganic substances widely present, that is, various trace metal elements. With the deepening of research, the occurrence and abundance of trace metal elements in petroleum and the geochemistry of crude oil have attracted the attention of researchers, which is of great significance in the fields of crude oil evaluation and environmental science. In crude oil from different origins, the types and quantities of metal elements are different, mainly depending on the special environmental conditions and the evolution stage of the oil, and the crude oil penetrates from the origin to the wider nature, and the multiple indicators of the metals...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N27/626
CPCG01N27/62
Inventor 马明肖寒肖安山邹兵魏新明李明哲高翔孙晓英
Owner CHINA PETROLEUM & CHEM CORP
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