Table 2. Data sets with Retention Data Found in the Literature That are Included in the Database.

data set	size of data set	number of compounds	number of columns	references
1	88	88	1	(13)
2	47	45	1	(14)
3	5	5	1	(3)
4	7	7	1	(15)
5	51	17	3	(11)
6	22	22	1	(2)
7	76	12	3	(16)
8	6	6	1	(17)
9	25	11	3	(18)
10	11	11	1	(19)
11	25	19	1	(20)
12	34	16	2	(21)
13	135	19	8	(22)