Skip to main content
U.S. flag

An official website of the United States government

Determination of chlorine in silicate rocks

January 1, 1959

In a rapid accurate method for the determination of chlorine in silicate rocks, the rock powder is sintered with a sodium carbonate flux containing zinc oxide and magnesium carbonate. The sinter cake is leached with water, the resulting solution is filtered, and the filtrate is acidified with nitric acid. Chlorine is determined by titrating this solution with mercuric nitrate solution using sodium nitroprusside as the indicator. The titration is made in the dark with a beam of light shining through the solution. The end point of the titration is found by visually comparing the intensity of this beam of light with that of a similar beam of light in a reference solution.

Publication Year 1959
Title Determination of chlorine in silicate rocks
DOI 10.1021/ac60156a044
Authors L. C. Peck, E. J. Tomasi
Publication Type Article
Publication Subtype Journal Article
Series Title Analytical Chemistry
Index ID 70010663
Record Source USGS Publications Warehouse