6. 601 to 999 - Physical TestingFood & PerishablesIndustrialPT Scheduled StudiesShop by General ChapterShop by IndustryTopicals & CosmeticsUSP Proficiency Testing Program

USP <644> Conductivity Proficiency Test


Proficiency Test for laboratories performing USP 644 Conductivity testing on pharmaceutical materials by measuring voltage in milli siemens. read more



Catalog Number:
Choose Study

PH-0523, PH-0923

U.S. Pharmacopeia USP PT Program Schedule

2023 PH
Study Number Study Opens Study Closes
PH-0123 Jan. 16, 2023 March 17, 2023
PH-0523 May 15, 2023 July 14, 2023
PH-0923 September 15, 2023 November 17, 2023
PH-0124 January 15, 2024 March 17, 2024


Product Details

Quantitative Proficiency Test (PT) for laboratories performing Conductivity by USP <644> or equivalent. Participants report quantitative results for conductivity, testing for material’s conductivity in micro siemens per centimeter (uS/cm), for their sample(s). Samples provided two vials containing 10g of material.  Participants are asked to determine the conductivity of target analyte in the sample per the USP monograph or equivalent.

Target Analyte: Erythriol, powdered or granulated solid