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

Abstract

The scope and limitations of the Karl Fischer titration was studied for various aromatic sulfonyl chlorides. Standard addition determination of water content was performed using p‐toluenesulfonyl chloride samples; it was confirmed that the method had high accuracy. A set of substituted aromatic sulfonyl chlorides (95 compounds) was subjected to the Karl Fischer titration in order to establish the relevance of the method depending on the compound structure. It was shown that the method gave satisfactory results and was applicable to most aromatic sulfonyl chlorides, except the compounds possessing strong electron‐withdrawing substituents.

Detection Method and Common Characteristics of Waste Solvent from Semiconductor Industry

“…In this study, the recovered waste organic solvent was taken as the research object, and the Karl Fischer water analysis method was used to analyze the water content of the waste solvent [10,[22][23][24]. Multiple parallel experiments and standard substance recovery experiments were set up to validate the accuracy of the water analysis method regarding the water content detection of the waste organic solvent from TFT-LCD production [25][26][27]. The organic solvents in the waste solvent were collected via evaporation and decompression distillation, and the residues, which included the photoresist and other solids in the waste organic solvents, were weighed using the weighing method.…”