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Table 3 Validation of the micro-wave assisted digestion method against certified reference material (Oriental tobacco leaves, CTA-OTL-1), n = 6

From: Quantitative analysis of some important metals and metalloids in tobacco products by inductively coupled plasma-mass spectrometry (ICP-MS)

Element Certified value ± S.D. (μg/g) Recovered value ± S.D. (μg/g) % R.S.D. % Recovery
27Al 252 ± 49 264.03 ± 5.14 3.29 104.77
52Cr 0.991a 1.07 ± 0.07 5.42 107.97
55Mn 136 ± 5 141.59 ± 3.2 2.85 104.11
56Fe 258a 248.11 ± 4.77 2.76 96.17
59Co 0.154b ± 0.007 0.167b ± 0.009 5.73 108.44
60Ni 1.49 ± 0.14 1.525 ± 0.076 1.64 102.35
65Cu 5.12 ± 0.2 5.48 ± 0.02 4.8 107.03
66Zn 43.6 ± 1.4 44.85 ± 0.05 1.99 102.87
75As 0.138b ± 0.01 0.144b ± 0.01 3 104.35
82Se NAc BDLd NAc NAc
111Cd 2.23 ± 0.12 2.386 ± 0.005 4.78 106.99
208Pb 0.972b ± 0.147 0.965b ± 0.028 0.51 99.28
  1. a Information value; b ng/g; c Not available; d Below detection limit.