| Not official USP-NF text | ||||
| PROBENECID | ||||
| PF | LGS# | Brand | Type of Test | Additional Information |
| 11(1) | L11 | MicroBondapak Phenyl | Assay | Manuf. Waters. |
| 11(1) | L11 | UltraTechsphere 5 Phenyl | Assay | Alternative reagent |
| 11(1) | L11 | Spherisorb P(Phenyl) | Assay | Alternative reagent |
| 17(2) | L11 | MicroBondapak Phenyl | Chromatographic purity | Manuf. Waters. |
| 17(3) | G43 | None Cited | Organic volat. impurities | See Method V  467 |