Determination of Fluorine and Chlorine in Organic Compounds

It is pointed out by Elving and Ligett (.5) that compounds containing two or ... obtained for fluorine varied from 37.4 to 38.7%, compared to a theore...
0 downloads 0 Views 561KB Size
Determination of Fluorine and Chlorine in Organic Compounds R. H. KIMBALL

AND

LEWIS E. TUFTS, Hooker Electrochemical

IS recognized that many

ITof the methods commonly

employed for the decomposi-

tion of organic compounds, while adequate to bring chlorine, bromine, or iodine completely into ionic form, do not succeed in transforming

organically bound fluorine quantitatively to fluoride ion.

Company, Niagara Falls, N. Y.

In the analysis of organic compounds containing fluorine, or both fluorine and chlorine, the sample is weighed in a gelatin capsule or glass ampoule, and heated with metallic potassium in a nickel bomb at 500° to 550° C. for 2 hours. The bomb is washed out and the resulting solution is made up to volume. Half of this solution is titrated for chloride by the V olhard method. The other half (or less) is analyzed for fluoride by distillation and titration with thorium The method is particularly suitable where nitrate. high accuracy is desired. The bomb method of de