CAPILLARY GAS CHROMATOGRAPHIC DETERMINATION OF MONONUCLEAR AROMATICS IN MINING DRAINAGE

The mononuclear aromatics in mining drainage were determined in line with the China national standard methods and American EPA methods. During the determination, QA/QC experiments were completed and samples were quantitatively measured by external standard. This paper compares the injection methods by HP 7694E Headspace Sampler and HP 7695 Purge & Trap Concentrator. Using HP 7694E Headspace Sampler, the mononuclear aromatics recovered ranged from 108.58% to 116.38% and the limits of the method detection were in the range between 5.00 and 10.00 μg/L. Using HP 7695 Purge & Trap Concentrator, the mononuclear aromatics recovered ranged from 94.87% to 105.63% and the limits of the method detection were in the range 0.25-0.50 μg/L.