Methyl Esterification Combined with Gas Chromatography-Mass Spectrometry (GC-MS) for Determining the Contents of Lubricant to Evaluate the Compatibility of Chlorinated Butyl Rubber Stoppers with Liposome Injections

Table 3

Contents of target analytes in chlorobutyl rubber stoppers.

No.	Methyl hexadecanoate (mg·g^−1)	Palmitic acid (mg·g^−1)	Methyl stearate (mg·g^−1)	Stearic acid (mg·g^−1)
1	0.4751	0.4512	0.6563	0.6255
2	0.4796	0.4555	0.6628	0.6316
Average contents	0.4774	0.4534	0.6596	0.6286