Table 6.

Concentrations of elements (ppm or µg/g for B, Be, and Li and g/100 g for Ca, Mg, K, Na, P, and S) in kohl samples compared to the limitations established by governmental institutions. Orange boxes indicate values above the German Federal Office of Consumer Protection and Food Safety (BVL) [45,46] limits. Red boxes show levels which exceed the European Union legal limits [40]. LOD: limit of detection. ND: not described.

Kohl Sample	Ca (ppm)	B (ppm)	Be (ppm)	K (ppm)	Li (ppm)	Mg (ppm)	Na (ppm)	P (ppm)	S (ppm)
#1	0.21	310.77	<0.0016	0.090	<0.0011	0.025	0.017	192.71	2251.98
#2	0.03	32.55	0.44	0.003	0.14	0.003	0.001	11.32	15,637.06
#3	7.06	22.03	0.82	0.464	5.21	0.165	0.024	120.25	2057.33
#4	0.02	5.31	<0.0016	0.029	0.31	0.002	0.082	1.98	688.18
#5	0.018	56,235.01	<0.0016	0.002	0.52	0.005	0.023	1.25	76.82
#6	0.072	101.40	<0.0016	0.006	<0.0011	0.017	0.006	24.69	30,214.72
#7	0.005	33.24	<0.0016	0.002	<0.0011	0.001	0.001	0.58	490.71
#8	0.003	199.98	<0.0016	0.048	0.25	0.007	0.026	1.59	163.76
#9	0.003	97.53	<0.0016	0.085	0.29	0.012	0.033	<LOD	475.56
#10	0.004	12.47	<0.0016	<LOD	<0.0011	0.003	0.001	<LOD	45.62
#11	118.15	117,128.61	<0.0016	23.698	0.689	29.507	192.067	15,584.94	882,612.18
EU limits	ND	ND	ND	ND	ND	ND	ND	ND	ND
BVL limits	ND	ND	ND	ND	ND	ND	ND	ND	ND