Determination of silver, bismuth, cadmium, copper, lead, and zinc in geologic materials by atomic absorption spectrometry with tricaprylylmethylammonium chloride
Analytical Chemistry
By: John G. Viets
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Abstract
Interferences commonly encountered in the determination of silver, bismuth, cadmium, copper, lead, and zinc at crustal abundance levels are effectively eliminated using a rapid, sensitive, organic extraction technique. A potassium chlorate-hydrochloric acid digestion solubilizes the metals not tightly bound in the silicate lattice of rocks, soils, and stream sediments. The six metals are selectively extracted into a 10% Aliquat 336-MIBK organic phase in the presence of ascorbic acid and potassium iodide. Metals in the organic extract are determined by flame atomic absorption spectrometry to the 0.02-ppm level for silver, cadmium, copper, and zinc and to the 0.2-ppm level for bismuth and lead with a maximum relative standard deviation of 18.8% for known reference samples. An additional hydrofluoric acid digestion may be used to determine metals substituted in the silicate lattice.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Determination of silver, bismuth, cadmium, copper, lead, and zinc in geologic materials by atomic absorption spectrometry with tricaprylylmethylammonium chloride |
| Series title | Analytical Chemistry |
| DOI | 10.1021/ac50030a023 |
| Volume | 50 |
| Issue | 8 |
| Year Published | 1978 |
| Language | English |
| Publisher | ACS Publications |
| Description | 5 p. |
| First page | 1097 |
| Last page | 1101 |
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