Objective: To establish a method to determine the content of three residual organic solvents such as benzene

methylbenzene and phenylethylene in the D-101 macroporous absorption resin

by headspace-GC. Method: Headspace condition was as follows:equilibrium temperature 120℃; pressurization time 0.5 min; equilibrium time 30 min; ration ring filling time 0.5 min; sample injection time 1 min. Chromatographic condition was as follows:FID-detector

DM-1 GC column; column temperature

the initial temperature was kept at 60℃ for 10 min

then

rose to 200℃ at the rate of 5℃·min-1; split ratio was 2:1

flow rate was 0.4 mL·min-1

N2-Air-H2 (30:300:30). Result: The method was in good linear relation

recovery (more than 90%)

precision and reproducibility. Limits of detection were less than 3 PPM. Conclusion: This method is more closed to truth-value than the method of solvent extraction and direct injection

and also operates simply. So it is suitable for determining the content of residual organic solvent in the D-101 macroporous absorption resin.