Industrial p-chlorophenol (Appendix A)

Appendix A

Determination of p-chlorophenol content-gas chromatography operating conditions (reference)

A1 Typical working conditions of chromatographic test

Chromatographic column temperature: 175℃;

Temperature of detection room: 230℃;

Vaporization chamber temperature: 240℃;

Carrier gas flow: 20mL/min;

Hydrogen flow rate: 45mL/min;

Air flow: 450mL/min;

Injection volume: 1uL

In order to obtain the best separation conditions, the working conditions of different types of chromatographs can be changed reasonably

A2 Typical spectra of industrial p-chlorophenol and its impurities

See Figure A1

A3 retention time (TR) and relative correction factor (f _ai ) of each component

See Table A1

Table A1

A4 Determination of relative correction factor

Weigh 0.

In the formula: A _s -peak area of ​​internal standard substance;

A _i —the peak area of ​​component i;

m _s —the mass of the internal standard substance dimethyl phthalate in the calibration mixture , g;

m _i —the mass of component _{i in the} calibration mixture, g

The relative correction factor should be re-measured every two weeks, and can be re-measured at any time if necessary