Analysis for tellurium in rocks to 5 parts per billion

Journal of Research of the U.S. Geological Survey
By:  and 

Links

Abstract

In the proposed method, a 12.5-g sample is digested with nitric acid and evaporated to dryness; the excess nitric acid is removed by reaction with formic acid. Tellurium is extracted from the dried residue into hydrobromic acid and is then coprecipitated with arsenic, using hypophosphorous acid as the reducing agent. The precipitate is dissolved in a solution of hydrobromic acid and bromine, from which the tellurium is extracted into 0.6 ml of methyl isobutyl ketone. Tellurium content is estimated by atomic absorption spectrophotometry. Recovery of tellurium from nitric acid solutions carried through the procedure approached 100 percent through the analytical range 5-200 ppb. The relative standard deviation of five consecutive analyses of USGS standard rock GSP-1 was 5.26 percent at a mean concentration of 20.8 ppb. Under optimum conditions an average of 20 samples may be analyzed per man-day.

Study Area

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Analysis for tellurium in rocks to 5 parts per billion
Series title Journal of Research of the U.S. Geological Survey
Volume 3
Issue 2
Year Published 1975
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description 5 p.
First page 191
Last page 195
Country United States
State Colorado
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional metadata about this publication, not found in other parts of the page is in this table