Not official USP-NF text
THEOPHYLLINE
PF LGS# Brand Type of Test Additional Information
9(6) L1 MicroBondapak C18 Assay Reprinted 12(1), 12(4), 16(2)
12(1) L1 MicroBondapak C18 Identity See Assay
17(2) G43 None Cited Organic volat. impurities See Method V 467