Table 3.

Accuracy determined by analysis of standard and certified reference materials (n=20). Values are in μg/g dry tobacco or leaves.

	NIST 1570a	Target	NIST 1573a	Target	CTA-OTL1	Target	INCT-OBTL5	Target	INCT-PVTL6	Target	1S3	Previous (10)
Be	0.0071 ± 0.0008	NC	0.031 ± 0.003	NC	0.111 ± 0.005	NC	0.109 ± 0.007	0.0812 (info)	0.025 ± 0.002	NC	0.042 ± 0.003	0.044 ± 0.006
Cr	1.74 ± 0.07	NC	2.06 ± 0.12	1.99 ± 0.06	2.63 ± 0.16	2.59 ± 0.32	6.62 ± 0.50	6.30 (info)	0.861 ± 0.126	0.911 (info)	4.00 ± 0.27	3.63 ± 0.39
Mn	65.2 ± 1.5	75.9 ± 1.9	243 ± 7	246 ± 8	421 ± 9	412 ± 14	186 ± 4	180 ± 6	128 ± 8	136 ± 5	389 ± 9	391 ± 21
Co	0.36 ± 0.02	0.39 ± 0.05	0.55 ± 0.03	0.57 ± 0.02	0.949 ± 0.062	0.879 ± 0.039	0.962 ± 0.060	0.981 ± 0.067	0.154 ± 0.010	0.154 ± 0.007	1.46 ± 0.06	1.39 ± 0.10
Ni	2.16 ± 0.34	2.14 ± 0.10	1.67 ± 0.09	1.59 ± 0.07	5.97 ± 0.18	6.32 ± 0.65	8.44 ± 0.44	8.50 ± 0.49	1.35 ± 0.05	1.49 ± 0.14	2.78 ± 0.11	2.48 ± 0.16
As	0.066 ± 0.008	0.068 ± 0.012	0.113 ± 0.012	0.112 ± 0.004	0.546 ± 0.021	0.539 ± 0.060	0.767 ± 0.046	0.668 ± 0.086	0.128 ± 0.010	0.138 ± 0.010	0.309 ± 0.023	0.314 ± 0.028
Se	0.115 ± 0.009	0.117 ± 0.009	0.062 ± 0.008	0.054 ± 0.003	0.038 ± 0.007	0.153 ± 0.018	0.044 ± 0.010	NC	0.020 ± 0.004	NC	0.061 ± 0.008	<0.69
Cd	2.70 ± 0.08	2.89 ± 0.07	1.42 ± 0.07	1.52 ± 0.04	1.18 ± 0.05	1.12 ± 0.12	2.85 ± 0.12	2.64 ± 0.14	2.40 ± 0.08	2.23 ± 0.12	1.44 ± 0.05	1.51 ± 0.11
Pb	0.18 ± 0.01	0.20 (info)	0.58 ± 0.03	NC	4.49 ± 0.27	4.91 ± 0.80	2.03 ± 0.07	2.01 ± 0.31	0.722 ± 0.040	0.972 ± 0.147	2.13 ± 0.09	1.98 ± 0.25
U	0.146 ± 0.004	0.155 ± 0.023	0.038 ± 0.007	0.035 (info)	0.095 ± 0.005	0.10 (info)	0.101 ± 0.005	0.113 (info)	0.020 ± 0.001	0.022 (info)	0.074 ± 0.004	NC

NC = Not Characterized; Info = Information Value