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A liquid chromatograph for determining diesel oil hydrocarbon composition and fatty acid methyl ester content, its determination method and application

A liquid chromatograph and fatty acid methyl ester technology, which is applied in the field of diesel analysis and detection, can solve problems such as cumbersome methods, hazards to operators and the environment, and increased method errors, achieving high accuracy of results, saving experimental costs, and high degree of automation Effect

Active Publication Date: 2020-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has many disadvantages: 1. This method requires manual pre-separation of diesel oil, and the solid-phase extraction column used in the pre-separation is a disposable consumable, resulting in high cost of single analysis; 2. The pre-separation operation steps are cumbersome and require Volatile and toxic organic solvents are harmful to operators and the environment. Moreover, for special samples, the initial separation is not easy to meet the method requirements; 3. For diesel fuel containing biodiesel, it is necessary to add a series of The operation steps make the whole method more cumbersome and time-consuming, and also increase the error of the method

Method used

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  • A liquid chromatograph for determining diesel oil hydrocarbon composition and fatty acid methyl ester content, its determination method and application
  • A liquid chromatograph for determining diesel oil hydrocarbon composition and fatty acid methyl ester content, its determination method and application
  • A liquid chromatograph for determining diesel oil hydrocarbon composition and fatty acid methyl ester content, its determination method and application

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Experimental program
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Effect test

Embodiment 1

[0057] The present embodiment provides a kind of liquid chromatograph 10 that is used to measure diesel oil hydrocarbon composition and biodiesel (fatty acid methyl ester) content, and it comprises sample pump 11, sampler 12, six-way valve 13, the first liquid chromatograph Column 14 , second liquid chromatography column 15 and differential refractive index detector 16 .

[0058] Wherein, the six-way valve 13 includes a first valve port 131 , a second valve port 132 , a third valve port 133 , a fourth valve port 134 , a fifth valve port 135 and a sixth valve port 136 arranged clockwise in sequence.

[0059] The sampling pump 11 is connected with the injector 12, and the liquid chromatograph 10 has a first state for liquid feeding and a second state for detection, the transition between the first state and the second state is achieved by turning the six-way valve 13 to achieve.

[0060] In the first state, the outlet port of the injector 12 communicates with the second valve p...

Embodiment 2

[0064] The difference between this embodiment and Embodiment 1 is that the first liquid chromatography column 14 is a cyano column with a length of 30 mm, and the second liquid chromatography column 15 is a cyano column with a length of 250 mm.

Embodiment 3

[0066] The difference between this embodiment and Embodiment 1 is that the first liquid chromatography column 14 is a cyano column with a length of 10 mm, and the second liquid chromatography column 15 is a cyano column with a length of 200 mm.

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Abstract

The invention relates to a liquid chromatograph for determining diesel hydrocarbon composition and FAME (fatty acid methyl ester) content as well as a determination method and an application of the liquid chromatograph and belongs to the field of diesel analysis and detection. The liquid chromatograph comprises a sample injection pump, a sample injector, a six-way valve, a first liquid chromatographic column, a second liquid chromatographic column and a refractive index detector, wherein the sample injection pump is connected with the sample injector, and the liquid chromatograph has a first state for liquid feeding and a second state for detection by rotating the six-way valve. The liquid chromatograph is simple in structure and higher in automation degree and can determine hydrocarbon composition and the FAME content of diesel fuel containing biodiesel and diesel simultaneously. The determination method comprises steps as follows: the liquid chromatograph is used for separating and detecting a to-be-determined sample, and an external standard method is adopted for quantification. The method is simple and rapid and good in condition controllability, is used for determining dieselfuel containing or not containing biodiesel and petroleum fractions with the distillation range at the temperature of 150-400 DEG C and is high in accuracy of detection results.

Description

technical field [0001] The invention relates to the field of analysis and detection of diesel oil, and in particular to a liquid chromatograph for determining the hydrocarbon composition of diesel oil and the content of fatty acid methyl ester, its determination method and application. Background technique [0002] The content of polycyclic aromatic hydrocarbons in diesel oil is one of the control indicators stipulated in diesel oil standards, and its content needs to be accurately determined. However, the addition of biodiesel (fatty acid methyl ester) has brought great challenges to the current determination standards of polycyclic aromatic hydrocarbons. [0003] At present, there are three methods for determining the content of polycyclic aromatic hydrocarbons in diesel oil. One method is SH / T 0806-2008 "Determination of Aromatic Hydrocarbon Content in Middle Distillates by Differential Refractive Detector High Performance Liquid Chromatography". However, this method is n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/74
CPCG01N30/02G01N30/06G01N30/74G01N2030/027G01N2030/062G01N2030/065
Inventor 王乾李晨曦白正伟李怿贾苒吕大伟
Owner CHINA PETROLEUM & CHEM CORP
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