Quantification of Photocyanine in Human Serum by High-Performance Liquid Chromatography-Tandem Mass Spectrometry and Its Application in a Pharmacokinetic Study

Table 4

Stability of photocyanine under different storage conditions.

Storage conditions	Concentration (ng/mL)	Accuracy (%) (n = 6)	RSD (%)
Freeze-thaw three cycles	60	107.08	6.09
	1000	101.20	4.14
	1600	93.92	1.76
−80°C for 30 days	60	95.14	10.01
	1000	89.56	1.85
	1600	85.31	3.26
Post-preparative; (room temperature for 24 h)	60	102.52	12.12
	1000	96.16	3.55
	1600	102.15	2.00