| 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 |