Titration kit KFV S
Vessel KFV L-TS
Burette 10 mL
Homogenizer adapter M24 d12 mm
Homogenizer adapter M24 d18 mm
Terminal Cable 250 cm
Tips for volumetric Karl Fischer titration

Volumetric Karl Fischer Titration—Tips from Sample to Result

Useful Tips and Hints to Avoid Common Mistakes and Improve Results

Volumetric Karl Fischer Titration in Pharmaceuticals for Water Content Determination as per USP and Ph. Eur. Guidelines

Volumetric Karl Fischer Titration in Pharmaceuticals as per USP and Ph. Eur. Guidelines

A Step-by-Step Guide to Water Content Determination by Titration Method

Determining Manganese Content in Pyrolusite Ore by Complexometric Titration

Determining Manganese Content in Pyrolusite Ore by Complexometric Titration

A Titration Method Using DP5 Phototrode™ and Cu-ISE

FFA Amperometric Control Algorithm White paper

Understanding the FFA Amperometric Control Algorithm

Discover How the Control Algorithm Accelerates Accurate Water Content Determination with the EVA Volumetric KF Titrator

Weighing in Volumetric and Coulometric KF Titration

Weighing Excellence in Karl Fischer Titration

A Guide to Weighing Techniques in Volumetric and Coulometric KF Titration

What is an EVA Volumetric KF titrator?

The EVA Volumetric KF Titrator is a device that uses Karl Fischer titration with a volumetric technique to determine water content in a wide range of samples, from 100 ppm to 100%. It's an effective tool for accurate water content analysis in various industries, including pharmaceuticals, food, chemicals, and more.

What kind of Karl Fischer titrations are EVA V1 and V3 based on?

The EVA V1 and V3 titrators are based on Volumetric Karl Fischer titration and use Amperometric indication.

What is the FFA™ KF control algorithm?

The FFA™ stands for Fast Forecasting Amperometric control algorithm, is used in the EVA V1 and V3 volumetric KF titrators from METTLER TOLEDO.

The FFA™ control relies on the measured signal of the dSens M143 digital polarized double platinum pin electrode, which detects the presence of water and calculates the amount of titrant to add to the system to compensate for it at a 10 Hz rate. The FFA™ also categorizes the chemical system in the KF cell based on the measured data, enabling it to automatically adjust control parameters to efficiently add the exact amount of titrant necessary to titrate all the water contained in a sample. Read more.

What are the advantages of the amperometric vs voltametric indication?

While both amperometry (UPol) and voltametry (IPol) can be utilized to measure a KF titration. Amperometric indication in Karl Fischer titration has the advantage of providing a linear relationship between iodine concentration and measured current, allowing for online forecasting of the necessary titrant volume and faster analysis times. In contrast, voltametric indication relies on a potential reading and can experience significant oscillations in slow iodine-water reaction situations, making it less sensitive around the endpoint of the titration.

What is the dead volume of the EVA burettes, and why is it beneficial to have a low dead volume?

A low dead volume is beneficial for burettes because it reduces the residual liquid in the burette after dispensing. The EVA titrator boasts an automatic burette emptying feature that replaces liquid with air. Dead volume, or the residual volume of liquid that cannot be displaced, poses a safety hazard during burette maintenance and cleaning. The EVA burettes have a very low dead volume of only 54 μL.

Can the EVA KF titrator analyze samples that are not soluble in Karl Fischer solvent?

Yes, the EVA KF Titrators can analyze samples that are not soluble in Karl Fischer solvent. The EVA V1 titrator has several applicative approaches to bring the water of an insoluble sample into the KF solution, including elevated temperature (by the use of a thermostatable vessel), internal extraction (by the use of auxiliary solvents), and gas-phase extraction (DO308 oven). However, for challenging samples, the EVA V3 titrator is recommended as it offers additional features such as homogenizers that crush the sample and bring the water into solution, blank methods to adjust the result for water entry during homogenizing, and external extraction, allowing users to extract water from the sample using a solvent and measure aliquots from the resulting solution.

Does the EVA titrator support the internal extraction of solid samples using a homogenizer and if so, which homogenizer models are compatible?

Yes, the EVA V3 titrator supports the internal extraction of solid samples via homogenizer. The following homogenizer models are supported:

  • IKA T25 Easy Clean digital; Tooling: S25N-18G (must be purchased separately)
  • Kinematica POLYTRON PT1300 D; Tooling: PT-DA 12/2 EC-E123 (must be purchased separately)

These homogenizers are automatically recognized when connected to the EVA titrator via USB A socket. The necessary USB cable is delivered along with the homogenizers. An adapter is also required to connect the homogenizer to the KF cell (material number 30869296 for Kinematica Polytron PT1300D and material number No 30869297 for IKA T25 Easy Clean digital).