Indirect atomic absorption spectrometric determination of some cationic surfactants by continuous liquid/liquid extraction with tetrathiocyanatocobaltate

1988 ◽  
Vol 215 ◽  
pp. 233-240 ◽  
Author(s):  
P. Martínez-Jiménez ◽  
M. Gallego ◽  
M. Valcárcel
Keyword(s):  
Atomic Absorption ◽  
Cationic Surfactants ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Atomic Absorption Spectrometric

Atomic Absorption Spectrophotometry: Determination of Chromium in Plants

1975 ◽  
Vol 58 (3) ◽  
pp. 433-435
Author(s):  
Earle E Cary ◽  
Oscar E Olson
Keyword(s):  
Atomic Absorption ◽  
Biological Materials ◽  
Atomic Absorption Spectrophotometry ◽  
Liquid Extraction ◽  
Absorption Spectrophotometry ◽  
Wet Digestion ◽  
Liquid Liquid Extraction ◽  
Chromium Recovery

Abstract A previously reported method for the determination of chromium in plants and biological materials has been simplified. The method, which involves wet digestion, isolation and concentration of chromium by liquid-liquid extraction, and final determination by atomic absorption spectrophotometry, is sensitive to about 20 ng chromium. Recovery studies and analysis of standard materials show that this method is reliable.

Electrothermal Atomic Absorption Spectroscopic Determination of Chromium in Plant Tissues

1983 ◽  
Vol 66 (4) ◽  
pp. 850-852
Author(s):  
Earle E Cary ◽  
Michael Rutzke
Keyword(s):  
Atomic Absorption ◽  
Hydrofluoric Acid ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Ferric Hydroxide ◽  
Absorption Spectrometry ◽  
Liquid Extraction ◽  
Plant Tissues ◽  
Sample Digestion ◽  
Liquid Liquid Extraction

Abstract This method involves sample digestion in nitric, perchloric, and sulfuric acids. Chromium is concentrated by coprecipitation with ferric hydroxide. Redissolved iron is removed by liquid-liquid extraction, remaining silica is dissolved with hydrofluoric acid, and chromium is determined by electrothermal atomic absorption spectrometry. The sensitivity and detection limits for chromium approach those given by the manufacturers of the various instruments. Recovery studies and analysis of standard materials show that this method is reliable.

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