GB/T 6022-2008Butadiene for industrial use - Determination of oxygen in gaseous phase above liquid butadiene (English PDF)

1.1

standard specifies the determination of industrial liquid butadiene gas phase oxygen content by gas chromatography and thin film covering the battery electrochemistry, gas

Determination of the range of 100mL/m3 ~ 5000mL/m3, covered with a thin film battery with electrochemical measurement range of 1mL/m3 ~

5000mL/m3.

1.2

This standard does not explain all of the safety issues associated with use. Therefore, the user has the responsibility to take appropriate safety and health measures

Facilities, to ensure compliance with the provisions of the relevant national regulations.

3.1 Summary of Method

Gas sample through the sampling device into the chromatograph, and a carrier gas into the pre-column, the hydrocarbon components are pre-column adsorption, pre-cleaning

Separation column, the hydrocarbon components vented. Remaining separated components into the separation column, a detector with a thermal conductivity detector. Because oxygen at ambient temperature and in argon

Separation column is not isolated, and therefore the use of argon as a carrier gas, argon in the sample is not generated in response to the thermal conductivity cell. Oxygen peaks obtained surface

Compared with the product of the oxygen peak area obtained from the standard sample, thereby determining the oxygen content in the sample.

3.2 Reagents and materials

3.2.1 Carrier gas

Argon. purity of not less than 99.99% (volume fraction), the oxygen content of not more than 0.002% (volume fraction), free of organic impurities, water and Second

Carbon monoxide.

3.2.2 Preparation of standard sample gas

Nitrogen or argon. purity not less than 99.999% (volume fraction), an oxygen content of not more than 2mL/m3.

Oxygen. purity of not less than 99.99% (volume fraction).

3.2.3 Standard Series Gas Oxygen

The oxygen content was 50mL/m3 ~ 5000mL/m3, emboldened as nitrogen or argon (3.2.2).

3.2.4 stationary phase

Activated carbon (chromatography). diameter of 0.17mm ~ 0.25mm (60 mesh to 80 mesh);

5A molecular sieve (chromatography). diameter of 0.17mm ~ 0.25mm (60 mesh to 80 mesh).

3.3 instruments and equipment

3.3.1 Gas chromatograph

a quantitative gas injection device, cleaning device and a thermal conductivity detector gas chromatograph, the instrument of this standard to

Produces a given peak operating conditions is high, at least two times greater than the noise of the instrument.

3.3.2 Quantitative tubes

1mL or 5mL.

3.3.3 pre-separation column

Stationary phase. activated carbon (3.2.4);