Coulometric Reagent System Precision Iodine Generation Hanna's dosing algorithm allows for an extremely small amount of iodine necessary for the Karl Fischer reaction to be generated electrolytically using a pulsed current up to 400 mA delivering titrant accurately and precisely. Titration and Solvent System Chemically Resistant Titration Vessel and Tubing The glass titration cell and PTFE tubing is designed to withstand the harsh solvents and reagents involved in Karl Fischer reactions. Sealed Solvent System Ground glass joints completely seal the glass titration cell minimizing exposure to ambient humidity, keeping the system dry, and reducing reagent consumption while saving time between titrations. Solvent may be exchanged in a matter of seconds with a quick fitting adjustment. Molecular Sieve Desiccant High efficiency molecular sieve desiccant helps maintain low and stable drift rates within the titration cell while preventing the ingress of ambient humidity into the sealed solvent system. Digital built-in stirrer Automatic, integrated magnetic stirrer adjustable from 200-2000 RPM with optical feedback for automatic speed control. Titrator Capabilities Dynamic Titrant Dosing The titration speed feature allows for timely and accurate titration results by relating the amount of iodine generated to the mV response from the Karl Fischer reaction. Drift Rate Compensation The HI934 automatically adjusts the titration calculation to account for the effects of any ambient humidity entering the titration cell. This provides a more accurate result by correcting for water not present in the actual sample. Titration Results Averaging Successive results from a titration method may be averaged with recording of the standard deviation. Selectable Endpoint Criteria The HI934 employs a dual platinum pin electrode for bivoltammetric endpoint determination. Users may choose termination criteria based on mV stability times or drift rates. Multistage Cell Preparation A pre-titration stage eliminates residual water present in the solvent and the cell, providing a reliable baseline start to analysis. Standby mode then keeps the solvent dry between titrations and when the titrator is not in use. Interface & Display Detailed Titration Graphs A real-time titration curve can be displayed during each titration; this feature is useful when new methods are tested or when a procedure requires optimization. Interactive Color Display A large, color LCD screen clearly shows the chosen titration method along with results, units, drift rate, and mV value. Simple and Quick Navigation Virtual key selections present on the display allow for simple and quick navigation between screens and menus without getting lost in a nest of information. 4 Titration 4.27 www.hannainst.com |
RkJQdWJsaXNoZXIy MTI3NTM=