【ECH】用卡爾－費雪滴定法測定電池材料中的水含量

Water content within liquid electrolytes can be simply analysed using a direct injection coulometric titrator, such as the Aquamax KF Plus, or Aqua 40 basic system from ECH Elektrochemie Halle - ECH - Aquamax KF Plus – Using the direct injection technique a small amount of sample will be directly injected via syringe into the Karl Fischer titration cell, once entered into the cell the reaction will allow water content determination down to 1 part per million. By directly injection the sample, all contact with the atmosphere will be avoided, meaning the hygroscopic properties of the electrolyte will not absorb any water from the surrounding atmosphere, only the true water content is analysed.The water determination for powdered, gel or liquid battery materials can be realised using a coulometric Karl Fischer coupled with the principle of headspace technology with a closed loop carrier gas, as featured in the Aqua 40 Vario ECH - AQUA 40.00 Vario – Using this principle the battery sample is placed into a closed headspace vial and heating between 35-300 degrees C (depending on sample composition) during this heating phase, the water will be extracted and transported using a dry carrier gas into the titration cell where the coulometric reaction occurs, again allowing for ppm analysis of battery materials.