Table 2.

Individual Results for Elemental Carbon in SRM 1649a

Row	Method	Team	EC/TC	u(EC/TC)	N
1	AETH	1	0.069	0.004	4
2	T375	2	0.074	0.002	≥2
3	T375	3	0.077	0.002	3
4	T375	4	0.079	0.005	3
5	TOK	5	0.109	0.005	9
6	T375	6	0.187	0.013	6
7	TOT	18	0.200	0.005	4
8	Ch(N1)T	7	0.224	0.013	5
9	TOT	8	0.258	0.014	3
10	Ch(N2)T	7	0.280	0.004	6
11	Ch(N2)T	1	0.283	0.022	3
12	Ch(N3)	9	0.292	0.017	5
13	T340	7	0.346	0.025	5
14	T340	10	0.347	0.026	4
15	TOR	11	0.432	0.009	3
16	TLT	12	0.438	0.006	5
17	Ch(Cr)K	13	0.458	0.025	9
18	T500_EGA	14	0.500	0.010	2
19	Ch(N4)	13	0.520	0.057	3

Notes

EC/TC: Italics denote measurements on ACG prototype filters.

Row-6: T375 oxidation time 12 h, rather than 24 h.

Row-7: TOT tabulated result is for the bulk SRM; filter (ACG) result [Team 5] is 0.210 (u = 0.007, n = 7).

Row-8: Ch(N1)T result for small samples; possibility of particle loss.

Row-9: TOT tabulated result is for the bulk SRM; filter (ACG) result is 0.264 (n = 32).

Row-14: T340 tabulated result is for the bulk SRM; filter (ACG) result is 0.385 (n = 1).

Row-16: TLT tabulated result is the average of five results reported by Team 12. Separate results for the bulk SRM and filter (ACG) are 0.416 (n = 1) and 0.443 (n = 4).

Row-18: T500 tabulated result is upper limit, because of possible OC co-evolution; OC solvent removal result, 0.40, is a lower limit, because of particle loss.