Evaluation of new Karl Fischer reagents containing no organic chlorine compounds.

Determination of chlorine in organic compounds containing mercury

The standard procedure for the determination of chlorine in organic compounds of mercury consists in decomposition of the material, separation of mercury and determination of chlorine as chloride. Decomposition of the sample could be achieved by wet mineralization [1,2], ignition in a stream of oxygen [3—7] or nitrogen [8], ignition in a flask with oxygen [9], etc. [10, 11]. Chlorine and mercur...

The Basics of Karl Fischer Titration

From the reaction mechanism, it's evident that the reagent used for the titration needs to contain the following: Alcohol methanol was used originally, but in different variations of the reagent can be replaced by ethyl carbitol, methoxypropanol, ethanol, etc. Sulfur dioxide Iodine Base pyridine was used initially, but has since been replaced by imidazole, which assures a higher rate of reactio...

Halogenated volatile organic compounds in chlorine-bleach-containing household products and implications for their use

CHCl3 and CCl4 were the dominating halogenated VOCs in chlorine bleach products. Indoor air VOC estimates indicated substantial increases from bleach use. Carcinogenic risks from the use of bleach products may be considerably high. a r t i c l e i n f o

ORGANIC CHEMISTRY Organic Compounds containing Nitrogen

Measuring water content of feces by the Karl Fischer method.

We describe a technique for measuring the water content of stools by the Karl Fischer method. The analysis is based on removal of water into a mixture of methanol/chloroform (1/2), after dispersion of the stool by sonication in presence of solvent. An aliquot of the solution thus obtained is placed in themeasuring cell of a Karl Fischer apparatus and then analyzed in the classic way. We further...