Not official USP-NF text
345 ASSAY FOR CITRIC ACID/CITRATE AND PHOSPHATE
PF LGS# Brand Type of Test Additional Information
31(2) L61 Ion Pac AS-11 Assay 4.0 mm x 25 cm. Analytical column.
31(2) L61 Ion Pack AG- 11 Assay 4.0 mm x 5 cm. Guard column.