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Method for detecting polycyclic aromatic hydrocarbon in diesel oil by using comprehensive two-dimensional gas chromatography-hydrogen flame ionization detector

A two-dimensional gas chromatography and detection method technology, applied in the detection field of polycyclic aromatic hydrocarbons in diesel oil, can solve problems such as unsatisfactory results and complicated procedures

Inactive Publication Date: 2021-04-09
宁夏计量质量检验检测研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, the existing methods are complicated in procedure and unsatisfactory in effect, and each method can only produce one or one type of substance

Method used

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  • Method for detecting polycyclic aromatic hydrocarbon in diesel oil by using comprehensive two-dimensional gas chromatography-hydrogen flame ionization detector
  • Method for detecting polycyclic aromatic hydrocarbon in diesel oil by using comprehensive two-dimensional gas chromatography-hydrogen flame ionization detector
  • Method for detecting polycyclic aromatic hydrocarbon in diesel oil by using comprehensive two-dimensional gas chromatography-hydrogen flame ionization detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116]Example 1: Qualitative analysis of polycyclic aromatic hydrocarbons in diesel

[0117]1 instrument conditions

[0118]Table 1 Typical full two-dimensional gas chromatographic analysis conditions

[0119]

[0120]

[0121]2 Qualitative Analysis: This method first configures a mixed standard solution containing 37 kinds of boundary materials, and identifies a 37-dimensional and two-dimensional retention time corresponding to 37 boundary materials on the GC × GC-FID chromatograph by full-two-dimensional gas chromatograph. , Divide non-aromatic hydrocarbons, cycloalkal hydrocarbons, two ring aromatic hydrocarbons, three rings+Forms of aromatic hydrocarbons. The intermediate fraction is performed with a full two-dimensional gas chromatographic analysis, comparing the one-dimensional and two-dimensional retention time corresponding to 37 boundary materials, identifying the various hydrocarbon compounds of the intermediate fraction and qualitatively.

[0122]2.1 Configuration of border substance mixed...

Embodiment 2

[0144]Example 2: Quantitative analysis of polycyclic aromatic hydrocarbons in diesel

[0145]1 instrument conditions

[0146]Table 1 Typical full two-dimensional gas chromatographic analysis conditions

[0147]

[0148]

[0149]2 sample quantitative analysis

[0150]Quantitative Analysis If an external scale curve method is used, four sets of different concentrations of standard solutions are configured, and the standard curve is drawn, and the peak area of ​​each family is brought into formula (3) to calculate the multi-hydrocarbon content (mass fraction%). The polycyclic aromatic hydrocarbon content is calculated from equation (5). The two parallel results will be counted average to obtain a polycyclic aromatic hydrocarbon content in diesel samples.

[0151]Quantitative Analysis If the peak area is used, the peak area of ​​each family is brought into formula (4), and each hydrocarbon content is obtained. The polycyclic aromatic hydrocarbon content is calculated from equation (5). The two parallel resu...

Embodiment 3

[0186]Example 3: Full two-dimensional gas chromatography - hydrogen flame ionization detector (GC × GC-FID) detection method for detection of polycyclic aromatic hydrocarbons in diesel 1

[0187]The experimental selection of three samples of different concentrations (mass fraction%) of the high and low in GC × GC-FID test analysis, repeatedly determined 7 times, calculated relative standard deviation, and investigating the repeatability of the analysis method. The results are shown in Table 5. As can be seen from Table 5, the standard deviation of the three diesel samples is within 5% of the standard deviations of the three diesel samples in the total two-dimensional gas chromatography (GC × GC-FID). It indicates that the two methods are repeated, meet the requirements of the analysis.

[0188]Table 5 Determination of relative standard deviations of polycyclic aromatic hydrocarbons in diesel (n = 7)

[0189]

[0190]

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Abstract

The invention discloses a method for detecting polycyclic aromatic hydrocarbon in diesel oil by using a comprehensive two-dimensional gas chromatography-hydrogen flame ionization detector. The method is characterized by comprising the following qualitative analysis method. The invention also discloses a quantitative method. The invention provides a brand-new analysis means, which can be used for carrying out comprehensive ethnic analysis on diesel oil and accurately determining certain specific compounds.

Description

Technical field[0001]The present invention belongs to the detection method of polycyclic aromatic hydrocarbons in diesel, and more particularly to detecting methods of polycyclic aromatic hydrocarbons in diesel using a full two-dimensional gas chromatography-hydrogen flame ionizing detector.Background technique[0002]The content of the aroma in diesel is one of the factors affecting exhaust gas emissions and fuel combustion properties (expressed in hexane). With the increasing demand of environmental protection, the demand of total aromatic hydrocarbons in diesel is increasingly strict, and thus requires precise analysis methods to determine the total aromatic hydrocarbon and polycyclic aromatic hydrocarbon content of the product. The existing main methods are as follows:[0003]GB / T11132 is used to determine aromatic hydrocarbon in diesel, but is not suitable for a fraction of a boiling point greater than 315 ° C and low accuracy. SH / T 0606 can determine the total aromatic hydroca...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/68G01N30/86
CPCG01N30/02G01N30/06G01N30/68G01N30/8675G01N2030/047
Inventor 李红俊赵双宏代静张兴军章伟王慧利王文华
Owner 宁夏计量质量检验检测研究院
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