in order to evaluate the load of heavy metals ( cd , cu , hg , ni , pb , zn ) imposed on the river leine by the city of gottingen ( medium-sized town ) the content of heavy metals in fish samples ( which had been collected at two points on the river leine , upstream , respectively downstream of gottingen -- fig . 1 ) were determined by atomic absorption spectroscopy .
C0025424
hg
C0347988
heavy metals