Determination of Antioxidant 264 in the Butyl Rubber Stopper and the Compatibility with Recombinant Potent Antitumor and Antivirus Protein Injection

Table 1

Recovery of antioxidant 264 from the rubber stopper.

Sample	m sample/μg	m added/μg	m found/μg	Recovery (%)	Average recovery (%)	RSD (%)
Antioxidant 264 (1)	320.24	354.79	670.27	98.51	97.82	1.56
	320.40	366.11	670.27	94.93
	320.16	360.66	670.88	96.89
Antioxidant 264 (2)	400.30	346.54	744.07	99.31
	400.50	355.80	744.07	96.95
	400.20	349.91	739.82	97.43
Antioxidant 264 (3)	480.36	364.79	838.82	98.68
	480.60	367.99	837.31	97.65
	480.24	360.01	840.34	100.02