[Determination of bromoform in the air of workplace by solvent desorption gas chromatography].

OBJECTIVE

To establish the method of solvent desorption gas chromatography for determination of bromoform in workplace air.

METHODS

Bromoform in the air was adsorbed by activated carbon tube sampling and solvent desorption using carbon disulfide, then analyed by GC with DB-FFAP capillary column.

RESULTS

The linear regression equation is y=1.22x-0.81 (r=0.999 9)between 0.57~300.00 μg/ml of target concentration in the air. The detection limit was 0.17 μg /ml. The relative standard deviations of the batch and inter batch were 1.7%~3.6%, 2.8%~6.3%, respectively. The sampling efficiency was 100%. The overall desorption efficiency was 95.0%. The breakthrough capacity was more than 0.61 mg(100 mg activated carbon).

CONCLUSION

The method is suitable to determine bromoform in the air of workplace.