Table 2.

Mineral element and heavy metal mean values (μg g⁻¹) of G. thoracica, H. itama, and T. binghami propolis.

Elements	Stingless bee propolis
	G. thoracica	H. itama	T. binghami
Al	7.92	33.03	48.59
Ca	150.06	18.11	550.05
Cd	---	0.599	0.664
Co	0.149	0.438	0.774
Cr	0.884	2.74	2.08
Cu	24.25	14.58	10.85
Fe	28.37	19.84	69.64
K	402.14	974.24	728.50
Mg	92.16	357.99	378.23
Mn	6.98	34.49	106.03
Na	7.64	273.26	48.06
Ni	0.102	2.20	2.10
Pb	0.195	0.75	1.00
Zn	2.97	0.24	–
As	0.716	4.45	4.45