Table 2.

The concentrations of R,S)-Ket, (R,S)-norKet, (R,S)-DHNK, (2R,6R)-/(2S,6S)-HNK, (2S,6S)-HKet and (2S,6R)-HKet in the calibration standards and quality control standards used in the validation of the achiral method in plasma.

	(R,S)-Ket (ng/ml)	(R,S)-norKet (ng/ml)	(R,S)-DHNK (ng/ml)	(2R,6R)-/(2S,6S)-HNK (ng/ml)	(2S,6S)-HKet (ng/ml)	(2S,6R)-HKet (ng/ml)
Calibration
1	25,000	500	500	2,000	40	30
2	18,750	375	375	1,500	30	22.5
3	12,500	350	350	1,000	20	15
4	6,250	125	125	500	10	7.5
5	5,000	94	94	375	7.5	5.6
6	3,125	63	63	250	5	3.8
QC
High	21,875	437	437	1,750	35	26
Medium	15,625	312	312	1,250	25	18
Low	9,375	187	187	750	15	11