| Not official USP-NF text | Column Equivalency Information | |
| PACKING | A reversed-phase packing made by coating a thin layer of polybutadiene on to spherical porous zirconia particles, 3 to 10 µm in diameter. | |
| L49 | BRAND NAME | MANUFACTURER |
| Zirchrom PBD | ZirChrom Separations Inc. | |