distance/mm	concentration/mM	uncertainty/mM
0	14.00000	0.02467	0.00345
1	18.00000	0.01542	0.00216
2	22.00000	0.00633	0.00089
3	26.00000	0.00211	0.00030
4	30.00000	0.00081	0.00011
5	34.00000	0.00011	0.00002
6	42.00000	-0.00022	0.00003
7	50.00000	-0.00070	0.00010