Instrumental neutron activation analysis has been applied in the determination of toxic and other trace elements in a set
of three algae materials provided by the International Atomic Energy Agency, with the aim of environmental preservation through
enhanced applications of nuclear analytical techniques. The quality of the analysis method has been evaluated by analyzing
a number of biological standard reference materials. By adding mineral nutrients, the cultivation of algae for metals is enhanced,
in particular, selected toxic heavy metals such as As, Cd, Cr, Hg, Ni and Pb. It is believed that the level of elemental concentration
in algae samples are dependent on environmental conditions due to its biochemical properties. Therefore, algae materials may
be useful as an indicator or controller of environmental water pollution.