Apart from these major elements, G. acerosa and S. wightii was found to possess trace elements like
Lead (Pb) and Zinc (Zn) in the concentrations of 0.001±0.0003 (Pb); 0.350±0.028 (Zn) and 0.006±0.00015
(Pb); 0.007±0.0005 (Zn) ppm and respectively (Table 3).