Table 1.

Overview of the sequence parameters used for all presented ultra-low-field measurements.

#	Substance	Avgs.	TR[s]	B p time[s]	B p field[mT]	B 1 Freq.[Hz]	Nucleus
1	Ethyl-5-fluoronicotinic acid	5	6.5	2	0.144–10.3	5775	19F
2	3-Fluoropyridine	5	6.5	2	0.144–10.3	5775	19F
3	3,5-Bis(trifluoromethyl)pyridine	50	3.5	2	0.144–10.3	5775	19F
4	Ethyl-5-fluoronicotinic acid	5	8.5	4	0.144–10.3	6140	1H
5	3-Fluoropyridine	5	8.5	4	0.144–10.3	6140	1H
6	3,5-Bis(trifluoromethyl)pyridine	5	8.5	4	0.144–10.3	6140	1H
7	Ethyl-5-fluoronicotinic acid	10	1.6–10.6	0–10	3.1	5775	19F
8	3-Fluoropyridine	10	1.6–10.6	0–10	5.2	5775	19F
9	3,5-Bis(trifluoromethyl)pyridine	25	1.5–10.5	1.5–10.5	0.14	5775	19F
10	Ethyl-5-fluoronicotinic acid	10	1.6–10.6	0–10	6.2	6140	1H
11	3-Fluoropyridine	10	1.6–10.6	0–10	7.7	6140	1H
12	3,5-Bis(trifluoromethyl)pyridine	10	1.6–10.6	0–10	7.7	6140	1H
13	Ethyl-5-fluoronicotinic acid	50	9.5	9.5	0.144	5775	19F
14	3-Fluoropyridine	50	9.5	4	5.2	5775	19F
15	3,5-Bis(trifluoromethyl)pyridine	200	5.25	5.25	0.144	5775	19F
16	Ethyl-5-fluoronicotinic acid	50	9.5	4	6.2	6140	1H
17	3-Fluoropyridine	50	9.5	4	7.7	6140	1H
18	3,5-Bis(trifluoromethyl)pyridine	100	10.1	5	7.7	6140	1H