The distributions of sodium and chlorine in leaf cross sections of the seag
rasses Zostera capensis and Thalassodendron ciliatum were studied using the
true elemental imaging system (Dynamic Analysis) of the NAC nuclear microp
robe. Analyses were performed using protons of 0.6 and 1.5 MeV and experime
ntal conditions were compared in detail, Using protons of 0.6 MeV is recomm
ended for mapping of Na, Mg and Al. (C) 1999 Elsevier Science B.V. All righ
ts reserved.