Element Addition experiments CRM baking chocolate (mg/kg) LOD LOQ
  Spiked (µg/L) Recovery
(%)
Certified Found (µg/kg) (µg/kg)
Al 500 92 n. r.* - 300 1000
Ba 500 106 n. r.* - 50 170
Cu 500 100 23.2 ± 1.2 22.8 ± 0.2 20 70
Fe 500 114 132 ± 11 131 ± 1 160 530
Mn 500 107 20.3 ± 1.3 19.9 ± 0.2 11 37
Sr 20 96 n. r.* - 4 15
Zn 500 103 36.6 ± 1.7 36.1 ± 0.3 250 850
As 20 116 n. r.* - 0.2 0.6
Co 20 99 n. r.* - 1.5 5
Cr 500 103 n. r.* - 27 90
Ni 20 102 n. r.* - 0.9 3.2
Se 20 122 n. r.* - 0.5 1.9
V 20 106 n. r.* - 1.3 4.3

* n. r.: not reported

Table 2: Analytical features obtained in the method validation.