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USP <621> Chromatography HPLC Proficiency Test for Liquids


Proficiency Test for laboratories performing testing in accordance with USP <621> using High Pressure Liquid Chromatography HPLC on liquid pharmaceutical materials. read more



Catalog Number:
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PH-0922, PH-0123, PH-0523

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: Ibuprofen Liquid Solution (acetonitrile)

Negative Samples: Acetaminophen Liquid Solution (acetonitrile)

Ibuprofen (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