Table 3. Analysis of NIST SRM 2483, Single-Wall CNTs (Raw Soot), by GDMS (n = 5).

analyte	certified value	measured valueb	recovery (%)
Ca, %a	0.303	0.346 ± 0.034	88
Cl, %	0.2125 ± 0.0089	0.2635 ± 0.672	81
Co, %	0.963 ± 0.017	0.971 ± 0.036	99
Mg, %	0.1150 ± 0.0011	0.1155 ± 0.080	100
Mo, %	3.406 ± 0.029	3.24 ± 0.28	105
Na, %	0.1187 ± 0.0036	0.127 ± 0.007	93
Al, mg/kg	723 ± 19	1018 ± 45	71
As, mg/kg	12.5a	12.05 ± 0.6	104
B, mg/kg	74.7a	57.7 ± 1.9	129
Ba, mg/kg	119.0 ± 3.4	145 ± 8.3	82
Ce, mg/kg	192.7 ± 7.3	122 ± 6.7	158
Cu, mg/kg	186a	195 ± 1.05	95
Dy, mg/kg	8.36 ± 0.17	5.3 ± 0.64	158
Eu, mg/kg	2.27 ± 0.13	2.34 ± 0.3	97
Mn, mg/kg	4.482 ± 0.041	4.6 ± 0.2	97
Sm, mg/kg	13.09 ± 0.90	14.7 ± 0.7	89
Th, mg/kg	25.7 ± 4.4	29.8 ± 1.0	86
V, mg/kg	6.89 ± 0.14	8.11 ± 0.4	85

^aInformation value only.

^bResults presented as the mean ± standard deviation.