In the same manner, 0.5 g of soil
(dry weight basis) was microwave digested using 10 mL of 65%
HNO3 solution according to the EPA method 3051A (USEPA,
2007). The microwave oven used was a Milestone ETHOS TOUCH
127697series with a temperature range of 100–175 C and a pres-
sure of 1500 kPa. The total Hg was determined by cold vapor
atomic absorption spectroscopy (CV-AAS) using a Thermo Scien-
tific iCE 3000 series analyzer.