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Refs

As

Au, Pd, Pt

C, S

ICP40

ICP16

ICP10

Hg

NAA

Sb

Se

Te, Tl

W

XRF

NURE

Analysis of Tellurium and Thallium by Flame Vapor Atomic Absorption Spectrometry (USGS and XRAL laboratories)

Method

A 2-g aliquot of powdered sample is heated with 2 ml water, 1 ml conc H2SO4 and 10 ml conc HF overnight. 5 ml conc HCl and 1 ml 30% H2O2 are added and the sample is heated again. An ascorbic acid - potassium iodide solution is added, followed by an MIBK solution. The sample is shaken, the organic layer is separated, and Te and Tl are measured by flame AA. Details may be found in O'Leary (1996).

Data analysis

Distribution maps

Element
QA/QC
Conter-
minous
Alaska
Hawai`i
Te (ppm) In progress no data no data
Tl (ppm) In progress no data no data