Table 3: (a) Concentration (ppm or mg⋅kg−1, dry weight) of macro elements determined using ICP-OES. (b) Concentration (ppm or mg⋅kg−1, dry weight) of trace elements determined using ICP-OES and FAAS.
(a)

SamplesMgBaCaKNaAlSr

NS2505.52 11.4336.21 1.08478.35 5.992496.26 11.4321.84 0.22126.71 4.7392.97 0.81
LS2516.46 13.6231.77 4.99497.27 4.412464.39 13.6218.51 0.32131.90 1.6715.50 0.68
BN3460.00 9.1232.97 3.301406.30 3.043388.48 9.1236.31 0.98446.42 5.1653.89 1.60
MD5263.06 9.4928.61 3.517341.51 4.055219.54 9.4982.03 1.102810.91 7.0882.12 0.80
AC10811.66 13.1318.41 1.00545.32 7.9610655.91 9.1325.78 0.38196.79 4.13169.51 2.95

RDA280–350 mg1.1 mg1000 mg3.5 g1.5 g
UL350 mg2500 mg3000 mg2300 mg

NS: Nigella sativa, LS: Lepidium sativum, BN: Brassica nigra, AC: Aloe camperi, and MD: Meriandra dianthera.
RDA: recommended daily dietary allowance per day for adults; UL: tolerable upper intake level per day for adults [12, 13].
Concentration values are expressed as mean SD (); and (statistical significance compared to all the other plants).
(b)

SamplesZnCrVMnSeFeCuLiCo

NS52.23 0.951.18 0.041.08 0.0321.84 0.2272.64 2.98478.35 5.9936.21 1.080.52 0.050.28 0.02
LS26.94 1.531.29 0.051.05 0.0218.51 0.3233.64 5.47497.27 4.4131.77 4.990.23 0.020.19 0.03
BN37.90 1.841.60 0.042.23 0.0536.31 0.9858.73 3.92847.64 3.0932.97 3.300.18 0.060.29 0.01
MD24.17 1.101.86 0.039.38 0.1082.03 1.1046.81 5.961241.05 3.1728.61 3.510.86 0.101.48 0.08
AC23.25 0.631.66 0.011.23 0.0125.78 0.3825.47 3.66545.32 7.9618.41 1.000.39 0.050.25 0.04

RDA7–9 mg25–35 µg10–20 µg3 mg50–60 mcg9–15 mg900 µg
UL25 mg1000 mcg1.8 mg11 mg300 mcg25 mg5 mg

NS: Nigella sativa, LS: Lepidium sativum, BN: Brassica nigra, AC: Aloe camperi, and MD: Meriandra dianthera.
RDA: recommended daily dietary allowance per day for adults; UL: tolerable upper intake level per day for adults [12, 13].
Concentration values are expressed as mean SD (); concentration of Se expressed as ppb (µg⋅kg−1).
< 0.001, < 0.01, and < 0.05; NS: not significant (statistical significance compared to all the other plants).