Karl Fischer Water Determination & Instrument Operation
STANDARD OPERATING PROCEDURE Karl Fischer Water Determination & Instrument Operation 1. Objective To determine water content by Karl Fischer titration using volumetric and coulometric methods, and to perform instrument operation and re-standardization following USP <921>, IP, BP, EP, and manufacturer’s guidelines. 2. Scope Applicable to substances analyzed for water content using KF titrators in the QC laboratory. Covers both volumetric and coulometric titration, instrument operation, calibration, and sample analysis. 3. References USP <921> Water Determination Indian Pharmacopoeia – Water Determination British Pharmacopoeia – Water Determination European Pharmacopoeia – Water Determination Manufacturer User Manual (Metrohm / Matic / Labind India) 4. Apparatus & Reagents Karl Fischer titrator (volumetric or coulometric) Automatic buret(s) or coulometric cell Platinum electrodes and magnetic stirrer Tightly sealed titra...