Coulometric Karl Fischer Titrator

HI934 Karl Fischer Coulometric Titrator

The HI934 is a Karl Fischer coulometric titrator with high accuracy, great flexibility and repeatability. The titrator is designed to perform titrations for a variety of applications, allowing the user to obtain both good results and high-speed analysis. The HI934 analyzes for water content ranging from 1 ppm to 5%. This powerful titrator effectively monitors the KF reaction, detects the endpoint, and performs all necessary calculations and graphing.

Key Features

• Small footprint, requires minimal bench space
• Casing made with strong, chemically resistant plastic
• Powerful built-in algorithms for termination criteria based on fixed mV endpoint or absolute/relative drift
• Sample analysis averaging and statistical data
• Minimized water vapor entry with the sealed solvent system
• Balance interface for automatic weighing
• Support for 100 titration methods
• User-customizable reports
• Clearly displayed warning and error messages

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.

Generator Electrode Options

• Fritted (Diaphragm) Generator: Anode/anolyte and cathode/catholyte separated by glass diaphragm. Prevents anode-generated iodine from being reduced to iodide at the cathode. Ideal for extremely low water content, high accuracy demand, nitrogenous compounds and easily reduced samples.
• Fritless (No Diaphragm) Generator: Uses one easy-to-replace Karl Fischer reagent. Lower and more stable drift rates. Easier cleaning of generator cell.

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.

Data & Storage

Customizable Titration Reports: Each titration report is fully customizable so users can ensure they are storing and filing the appropriate data required for their application and procedures.

Flexible GLP Management: All necessary GLP (Good Laboratory Practice) information can be recorded with each sample including: sample identification, company and operator name, date, time, electrode ID codes, and calibration information.

Effortless Data Transfer: Data can easily be transferred to a USB flash drive or PC with the Hanna HI900PC application software. The USB port allows for the transfer of titration methods, titration reports, and software upgrades via USB flash drive.

Methods of Analysis

Customizable Methods: The HI934 can store up to 100 user-defined or standard titration methods. Each method may be customized and optimized for performance based on application and user requirements.

Adaptable Standard Methods: Standard methods developed by such affiliations as ISO, ASTM, AOAC, AOCS, EPA, and more can be programmed and customized directly onto the titrator.

Connectivity and Functionality

Configurable Balance Interface: Sample size may be automatically entered from any laboratory analytical balance with a RS232 serial output saving time and labor.

Multiple Peripherals: Users can print reports directly from the titrator using a standard parallel printer. An external monitor and keyboard may be attached for added versatility, as well as an analytical balance for automatic sample mass entry for titrations.

Versatile Data Management:

• Easily incorporate into any existing GLP data management program
• Easily record all necessary GLP information with every sample, such as sample identification, company and operator name, date, time, electrode ID codes and calibration information
• Data can be transferred to a PC using Hanna HI900PC software
• Easy transfer of methods, reports and software upgrades via a USB flash drive
• Users can print reports of analyses directly from the titrator using a standard parallel printer
• A keyboard can be attached for added versatility

Specifications

Determination

Titration Vessel

Detector Electrode

Generator Electrode

Stirrer

Reagent Handling System

Additional Specifications