A total 18 samples were collected at depth of 0-15cm using hand auger, stored in polyethylene bags and were oven dried at 60°C for 2days, followed by grinding with mortar and pestle and sieved using a 2 mm sieve. The soil samples were digested with the mixture of HNO3 and H2O2 using EPA method 3050B [13]. The solution obtained was filtered through a 0.45μm cellulose membrane filter and diluted to 10mL with miliQ water then stored at 4° before analysis. Concentration of in the digestion solution was determined by inductively couple plasma mass spectroscopy (ICP-MS). Analysis of the samples including soils digests and blanks was set up in duplicates