Table 3
Prevalence of persulphate exposure in nodes 1–5 of the tree
Matrix row
Node
Exposure prevalence
Base sample
Test sample
1
0.44%
0.56%
1
2
0.03%
0.09%
3
3.56%
3.99%
2
4
0.53%
0.55%
3
5
56.29%
60.12%