1 PT Scheduled Studies, 4 PT Shop by General Chapter, 5 Shop by Industry, 6. 601 to 999 - Physical Testing, Animal Feed, Dietary Supplements, Food & Perishables, Hemp & Cannabis, Industrial, Topicals & Cosmetics, USP Proficiency Testing Program, USP PT Schemes
USP <621> Chromatography HPLC Proficiency Test for Liquids
Product Details
Product Details
Qualitative and Quantitative Proficiency Test (PT) for laboratories performing HPLC Assay of liquid material by USP <621> or equivalent. Participants may report qualitative and/or quantitative results for their liquid material sample(s). Samples provided as a three sample panel. One of three samples will be positive for target analyte. Participants are asked to identify the positive sample by HPLC peak retention time match (ID Test). Determine the concentration (Assay) in milligrams per milliliter (mg/mL) of target analyte in the liquid sample per the USP monograph or equivalent.
Positive Sample: Caffeine Citrate Liquid Solution
Negative Samples: Citric Acid Liquid Solution
Caffeine (powdered solid) Reference Material Standard will be provided with the Proficiency Test Samples
USP PT Schedule
USP PT Schedule
| Study Number | Study Open Date | Study Close Date |
| PH-0422 | 4/18/2022 | 07/15/2022*
Extended from 6/9/22 |
| PH-0922 | 9/19/2022 | 11/18/2022 |
| PH-0123 | 1/16/2023 | 3/17/2023 |
| PH-0523 | 5/15/2023 | 6/14/2023 |
MSDS/SDS
