	humidity/ppm	concentration/mM	uncertainty/mM
0	0	0.010	0.002
1	640	0.170	0.027
2	1300	0.169	0.027
3	1900	0.317	0.051
4	2500	0.349	0.056
5	3200	0.368	0.059
6	6400	0.301	0.048
