Preparation method of benzene-cyclohexane two-component standard sample

A cyclohexane, two-component technology, applied in the field of detection and analysis, can solve problems such as operation and instrument errors, the purity of benzene and cyclohexane does not meet the requirements, and the purity of the two-component standard sample is affected, and the operation is simple and the output is achieved. big effect

Inactive Publication Date: 2013-05-08
TIANJIN KERMEL CHEM REAGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The purity of benzene and cyclohexane itself does not meet the requirements, which also directly affects the purity of the two-component standard sample
[0005] 2. During the weighing process of benzene and cyclohexane, there will be errors in operation and instruments, which will directly affect the purity of the two-component standard sample

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation of embodiment 1 benzene-cyclohexane two-component standard sample

[0016] (1) 100 grams of benzene and 120 grams of cyclohexane are mixed and heated;

[0017] (2) Real-time detection of volatiles when benzene and cyclohexane is heated by gas chromatography, when the temperature of the mixture of benzene and cyclohexane reaches the azeotropic point of benzene and cyclohexane for 2 minutes, and the volatile components no longer change , to collect volatiles;

[0018] (3) Cool and collect the volatile matter to obtain 180 grams of benzene-cyclohexane two-component standard sample.

[0019] The mass percentage content of benzene in the benzene-cyclohexane two-component standard sample is 46.06%, and the mass percentage content of cyclohexane is 53.92%.

Embodiment 2

[0020] The preparation of embodiment 2 benzene-cyclohexane two-component standard sample

[0021] (1) 100 grams of benzene and 110 grams of cyclohexane are mixed and heated;

[0022] (2) Real-time detection of volatiles when benzene and cyclohexane is heated by gas chromatography, when the temperature of the mixture of benzene and cyclohexane reaches the azeotropic point of benzene and cyclohexane for 2 minutes, and the volatile components no longer change , to collect volatiles;

[0023] (3) Cool and collect the volatile matter to obtain 175 grams of benzene-cyclohexane two-component standard sample.

[0024] The mass percentage content of benzene in the benzene-cyclohexane two-component standard sample is 46.07%, and the mass percentage content of cyclohexane is 53.92%.

Embodiment 3

[0025] The preparation of embodiment 3 benzene-cyclohexane two-component standard sample

[0026] (1) 100 grams of benzene and 130 grams of hexanaphthene are mixed and heated;

[0027] (2) Real-time detection of volatiles when benzene and cyclohexane is heated by gas chromatography, when the temperature of the mixture of benzene and cyclohexane reaches the azeotropic point of benzene and cyclohexane for 2 minutes, and the volatile components no longer change , to collect volatiles;

[0028] (3) Cool and collect the volatile matter to obtain 185 grams of benzene-cyclohexane two-component standard sample.

[0029] The mass percentage content of benzene in the benzene-cyclohexane two-component standard sample is 46.06%, and the mass percentage content of cyclohexane is 53.93%.

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Abstract

The invention discloses a preparation method of a benzene-cyclohexane two-component standard sample. The method comprises the following steps:1, mixing benzene and cyclohexane, and heating; 2, detecting volatile matters in real time when the benzene and cyclohexane are heated through utilizing gas chromatography, and collecting the volatile matters when the temperature of the benzene and cyclohexane mixture reaches the azeotropic temperature of benzene and cyclohexane and the components of the volatile matters do not change; and 3, cooling the collected volatile matters to obtain the benzene-cyclohexane two-component standard sample. The method utilizes the azeotropic characteristic of benzene and cyclohexane and allows the volatile matters to be collected when the benzene and cyclohexane mixture are heated to the azeotropic temperature, so the benzene-cyclohexane two-component standard sample having constant components and a high purity is obtained. The method has the advantages of simple operation, large output, and needing of a distillation device and a chromatographic instrument.

Description

technical field [0001] The invention discloses a method for preparing a standard sample in the field of detection and analysis, in particular to a method for preparing a benzene-cyclohexane two-component standard sample. Background technique [0002] Two-component standard samples are widely used in chromatographic detection and analysis, such as benzene-cyclohexane two-component standard samples, the preparation method in the prior art is to weigh quantitative benzene and quantitative cyclohexane, and then mix A benzene-cyclohexane two-component standard sample was obtained. [0003] But there are following problems: [0004] 1. The purity of benzene and cyclohexane does not meet the requirements, which directly affects the purity of the two-component standard sample. [0005] 2. In the process of weighing benzene and cyclohexane, there will be errors in operation and instruments, which will directly affect the purity of the two-component standard sample. Contents of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/12
Inventor 寇登民刘振荣
Owner TIANJIN KERMEL CHEM REAGENT
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