. 2014 Jul 25;9(7):e102844. doi: 10.1371/journal.pone.0102844

Table 3. Difference matrix showing mean isotopic differences between laboratories for bone collagen results, δ¹³C_col above diagonal, δ¹⁵N_col beneath diagonal.

Lab			A	B	C	D1	D2	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	U
	δ¹³C_col-VPDB (‰)		−17.2	−17.3	−17.0	−17.1	−17.2	−17.0	−16.9	−17.0	−17.0	−17.3	−17.0	−17.2	−16.9	−17.0	−17.1	−17.3	−16.1	−17.1	−17.1	−17.0
		δ¹⁵N_col-AIR (‰)	9.1	8.5	8.9	8.8	8.7	9.1	9.1	9.6	9.3	8.9	8.9	8.2	9.1	8.6	9.2	9.3	9.3	9.0	9.0	9.0
A	−17.2	9.1	-	0.1	0.2	0.1	0.0	0.2	0.2	0.2	0.2	0.1	0.2	0.0	0.3	0.2	0.1	0.1	1.1	0.1	0.1	0.2
B	−17.3	8.5	0.6	-	0.4	0.2	0.1	0.3	0.4	0.3	0.3	0.0	0.3	0.1	0.4	0.3	0.2	0.0	1.2	0.2	0.3	0.4
C	−17.0	8.9	0.2	0.4	-	0.1	0.2	0.0	0.0	0.1	0.1	0.3	0.0	0.2	0.0	0.0	0.1	0.3	0.9	0.1	0.1	0.0
D1	−17.1	8.8	0.3	0.3	0.1	-	0.1	0.1	0.2	0.1	0.1	0.2	0.1	0.1	0.2	0.1	0.0	0.2	1.0	0.0	0.1	0.1
D2	−17.2	8.7	0.4	0.2	0.1	0.1	-	0.2	0.3	0.2	0.2	0.1	0.2	0.0	0.3	0.2	0.1	0.1	1.1	0.1	0.1	0.2
F	−17.0	9.1	0.0	0.6	0.2	0.3	0.4	-	0.1	0.0	0.0	0.3	0.0	0.2	0.1	0.0	0.1	0.3	0.9	0.1	0.1	0.0
G	−16.9	9.1	0.1	0.5	0.2	0.3	0.3	0.1	-	0.1	0.1	0.4	0.1	0.3	0.0	0.0	0.2	0.4	0.8	0.2	0.1	0.0
H	−17.0	9.6	0.5	1.1	0.7	0.8	0.9	0.5	0.6	-	0.0	0.3	0.0	0.2	0.1	0.0	0.1	0.3	0.9	0.1	0.0	0.1
I	−17.0	9.3	0.2	0.8	0.4	0.5	0.6	0.2	0.2	0.3	-	0.3	0.0	0.2	0.1	0.0	0.1	0.3	0.9	0.1	0.0	0.1
J	−17.3	8.9	0.2	0.4	0.0	0.1	0.1	0.2	0.2	0.7	0.4	-	0.3	0.1	0.4	0.3	0.2	0.0	1.2	0.2	0.2	0.3
K	−17.0	8.9	0.3	0.3	0.0	0.0	0.1	0.3	0.2	0.8	0.5	0.0	-	0.2	0.1	0.0	0.1	0.3	0.9	0.1	0.0	0.0
L	−17.2	8.2	0.9	0.4	0.7	0.6	0.6	1.0	0.9	1.5	1.1	0.7	0.7	-	0.3	0.2	0.1	0.1	1.1	0.1	0.2	0.2
M	−16.9	9.1	0.0	0.6	0.2	0.3	0.3	0.0	0.0	0.5	0.2	0.2	0.2	0.9	-	0.1	0.2	0.4	0.8	0.2	0.1	0.0
N	−17.0	8.6	0.5	0.1	0.3	0.2	0.1	0.5	0.5	1.0	0.7	0.3	0.3	0.4	0.5	-	0.1	0.3	0.9	0.1	0.1	0.0
O	−17.1	9.2	0.1	0.7	0.3	0.4	0.5	0.1	0.1	0.4	0.1	0.3	0.4	1.0	0.1	0.6	-	0.2	1.0	0.0	0.0	0.1
P	−17.3	9.3	0.2	0.8	0.4	0.5	0.6	0.2	0.2	0.3	0.0	0.4	0.5	1.1	0.2	0.7	0.1	-	1.2	0.2	0.2	0.3
Q	−16.1	9.3	0.2	0.8	0.4	0.5	0.5	0.2	0.2	0.3	0.0	0.4	0.4	1.1	0.2	0.7	0.1	0.0	-	1.0	1.0	0.9
R	−17.1	9.0	0.1	0.5	0.2	0.2	0.3	0.1	0.0	0.6	0.3	0.2	0.2	0.9	0.0	0.4	0.2	0.3	0.2	-	0.0	0.1
S	−17.1	9.0	0.1	0.5	0.2	0.2	0.3	0.1	0.0	0.6	0.3	0.2	0.2	0.9	0.0	0.4	0.2	0.3	0.2	0.0	-	0.1
U	−17.0	9.0	0.2	0.4	0.1	0.2	0.2	0.2	0.1	0.7	0.3	0.1	0.1	0.8	0.1	0.4	0.2	0.3	0.3	0.1	0.1	-

Table 3. Difference matrix showing mean isotopic differences between laboratories for bone collagen results, δ13Ccol above diagonal, δ15Ncol beneath diagonal.

Table 3. Difference matrix showing mean isotopic differences between laboratories for bone collagen results, δ¹³C_col above diagonal, δ¹⁵N_col beneath diagonal.