Table 4.

Detection limit and accuracy by ICP-AES

Element	Detection limit (ng/mL)	Recovery (n =5, %)	RSD (%)
Ca	6.18	99.80 ± 1.12	1.12
Fe	1.33	99.60 ± 1.20	1.20
Mg	0.88	100.20 ± 0.76	0.76
P	6.64	98.90 ± 0.09	0.09
Sr	0.40	101.00 ± 0.10	0.10