. 2017 Jun 15;25(2):106–111. doi: 10.12793/tcp.2017.25.2.106

Table 3. Stability of sumatriptan standard in plasma under four different conditions (n=3).

Storage condition		LQC (0.9 ng/mL)		HQC (80 ng/mL)
Storage condition		Test^a	Reference^b	Test^a	Reference^b
Post-preparation (24 h at 10 ℃)	Mean	0.93	0.89	77.27	76.85
	SD (±)	0.02	0.02	2.67	1.45
	RSD (%)	2.49	2.25	3.45	1.89
Freeze-thaw cycles (three cycles)	Mean	0.90	0.90	72.84	71.86
	SD (±)	0.03	0.05	1.80	0.84
	RSD (%)	2.94	5.03	2.48	1.16
Short-term (6 h at room temperature)	Mean	0.90	0.93	76.31	76.85
	SD (±)	0.03	0.02	0.49	1.67
	RSD (%)	3.38	1.86	0.64	2.18
Long-term (211 days at −80 ℃)	Mean	0.97	0.94	83.40	83.66
	SD (±)	0.01	0.01	1.18	0.53
	RSD (%)	0.59	1.23	1.41	0.63

^aConcentration of samples stored under different storage conditions; ^bConcentration of freshly prepared samples.