Records of Ancient Human-Environmental Interaction from Mayan Southern Petén, Guatemala
Part 1: A 1300-year record of human activity and climate change from Cancuén
Appendix 2. Accuracy of chemical analyses:
Results of separate analyses of duplicate field samples |
Element/
Atomic mass |
CAN2004-1a |
CAN2004-1b |
%
difference |
CAN2004-11a |
CAN2004-11b |
%
difference |
| |
(µg/g) |
(µg/g) |
|
(µg/g) |
(µg/g) |
|
| Al 396.152 |
27986.32 |
26917.11 |
3.82 |
23382.39 |
25839.04 |
-10.51 |
| Ba 233.527 |
2.09 |
2.11 |
-0.84 |
2.12 |
2.16 |
-2.25 |
| Ca 317.933 |
52334.35 |
51194.24 |
2.18 |
47952.33 |
49807.74 |
-3.87 |
| Cd 228.802 |
0.81 |
0.84 |
-3.14 |
0.64 |
0.66 |
-3.01 |
| Co 228.615 |
38.12 |
42.54 |
-11.59 |
30.08 |
31.16 |
-3.59 |
| Cr 205.560 |
195.03 |
192.36 |
1.37 |
197.30 |
205.58 |
-4.20 |
| Cu 327.395 |
40.68 |
40.17 |
1.27 |
42.98 |
44.47 |
-3.47 |
| Fe 259.940 |
38885.46 |
38752.89 |
0.34 |
37039.87 |
39277.16 |
-6.04 |
| K 766.491 |
2951.40 |
2890.88 |
2.05 |
2864.41 |
2961.64 |
-3.39 |
| Mg 285.213 |
19808.76 |
19574.45 |
1.18 |
20116.03 |
21613.79 |
-7.45 |
| Mn 257.610 |
780.39 |
825.79 |
-5.82 |
649.25 |
647.96 |
0.20 |
| Na 589.592 |
228.12 |
207.29 |
9.13 |
182.69 |
168.62 |
7.70 |
| P 213.618 |
419.11 |
416.82 |
0.55 |
268.51 |
253.88 |
5.45 |
| Pb 220.353 |
8.37 |
8.74 |
-4.45 |
7.47 |
7.35 |
1.51 |
| S 181.972 |
11.88 |
11.66 |
1.88 |
11.71 |
11.40 |
2.69 |
| Zn 213.857 |
122.37 |
118.24 |
3.37 |
93.55 |
95.83 |
-2.44 |
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