| 13 kinds of elements concentrations in atmospheric particulates were determined by inductively coupled plasma mass spectrometry with microwave digestion. Nitric acid digestion system was taken to digest sample 20 minutes, and 8 mL nitric acid was added. The calibration curves showed a good linearity from 0 μg/L to 100 μg/L for Cu, Ni, Cr, Pb, Al, Mg, Mn and Ca, and from 0 μg/L to 5.00 μg/L for Ag, Ba, Co, Cd and Sn. The detection limits of the elements ranged from 0.07 ng/m3 to 1.82 ng/m3 except Al, Mg, and Ca had higher detection limits (air sampling volume 0.688 m3, formulated into a volume 50 mL).Membrane samples were analyzed by duplicated tests three times, giving value of RSD ≤1.2%. Spiked recoveries ranged from 92% to 108%. |
