Water Determination in Aromatic Sulfonyl Chlorides Using the Karl Fischer Titration Method: Scope and Limitations

2022 ◽  
Vol 7 (2) ◽  
Author(s):  
Olga B. Radchenko ◽  
Dmytro S. Radchenko ◽  
Angelika I. Konovets ◽  
Oleksandr O. Grygorenko
Keyword(s):  
Titration Method ◽  
Karl Fischer Titration ◽  
Water Determination ◽  
Sulfonyl Chlorides ◽  
Karl Fischer

Automatic Karl Fischer Titration of Moisture in Grain

1981 ◽  
Vol 64 (6) ◽  
pp. 1277-1283
Author(s):  
Frank E Jones ◽  
Carroll S Brickenkamp
Keyword(s):  
Standard Deviation ◽  
Moisture Content ◽  
Systematic Uncertainty ◽  
Reference Method ◽  
Titration Method ◽  
Karl Fischer Titration ◽  
Karl Fischer ◽  
Moisture Content Level ◽  
Primary Reference

Abstract Automatic Karl Fischer titrators of the motor-driven buret type and the coulometric generation type were applied to the determination of moisture in grain. Techniques were developed to optimize the performance of the Karl Fischer titration method and to overcome disadvantages attributed to it. The imprecision (1 standard deviation) of a determination is typically 0.06% moisture content at a moisture content of 15%; the systematic uncertainty from known sources is estimated to be ±0.05% moisture content at a moisture content level of 15%. It is suggested that the method be designated as the primary reference method for grain in general and for corn and soybeans in particular.

scholarly journals DETERMINATION OF WATER CONTENT IN PYROLYTIC TARS USING COULOMETRIC KARL-FISHER TITRATION

2017 ◽  
Vol 57 (1) ◽  
pp. 8-13
Author(s):  
Lenka Jílková ◽  
Tomáš Hlinčík ◽  
Karel Ciahotný
Keyword(s):  
Water Content ◽  
High Energy ◽  
Residual Water ◽  
Karl Fischer Titration ◽  
Water Separation ◽  
Water Determination ◽  
Karl Fischer ◽  
Energy Value ◽  
Content Determination ◽  
Coulometric Karl Fischer Titration

The liquid organic fraction of pyrolytic tar has a high energy value which makes possible its utilization as an energy source. However, before utilization, it is crucial to remove water from the liquid fraction. The presence of water reduces the energy value of pyrolytic tars. Water separation from the organic tar fraction is a complex process, since an emulsion can be readily formed. Therefore, after phase separation, it is important to know the residual water content in the organic phase and whether it is necessary to further dry it. The results presented in this manuscript focus on a water determination in liquid products from coal and biomass pyrolysis by a coulometric Karl‑Fischer titration. The Coulometric Karl‑Fischer titration is often used for a water content determination in gaseous, liquid and solid samples. However, to date, this titration method has not been used for a water determination in tars. A new water determination method, which has been tested on different types of tar, has been developed. The Coulometric Karl‑Fischer titration is suitable for tar samples with a water content not greater than 5 wt. %. The obtained experimental results indicate that the new introduced method can be used with a very good repeatability for a water content determination in tars.

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