the non-destructive energy dispersive X-ray fluorescence (EDXRF) technique. The samples
were collected from three different dumping sites of urban and suburban areas of the city of
Kolkata, West Bengal, India. The EDXRF spectrometer consisted of a 109Cd radioactive
source and a Si (Li) detector. To check the reliability of the system, NIST Standard Reference
Material-1648 UPM had been analyzed and it was found that within the experimental errors …