Determination of cadmium and lead in sediment and biota by furnace atomisation plasma emission spectrometry

1990 ◽  
Vol 5 (7) ◽  
pp. 635 ◽  
Author(s):  
Ralph E. Sturgeon ◽  
Scott N. Willie ◽  
Van T. Luong ◽  
Shier S. Berman
Keyword(s):  
Emission Spectrometry ◽  
Plasma Emission ◽  
Plasma Emission Spectrometry ◽  
Cadmium And Lead

Argon Plasma Emission Spectrometry of Uranium in Phosphatic Materials

1983 ◽  
Vol 66 (4) ◽  
pp. 949-951
Author(s):  
J D Norman ◽  
Louis A Stumpe ◽  
Joe R Trimm ◽  
Frank J Johnson
Keyword(s):  
Argon Plasma ◽  
Sample Pretreatment ◽  
Trioctylphosphine Oxide ◽  
Emission Spectrometry ◽  
Plasma Emission ◽  
Plasma Emission Spectrometry ◽  
Hydrochloric Acid Solutions ◽  
System 2 ◽  
Back Extract

Abstract A method is described for the determination of uranium by using a dc argon plasma emission spectrometer. Problems and interferences found in the method previously reported are overcome by using an improved sample pretreatment. A new synergistic system, 2% oxalic acid adjusted to pH 4.5 with triethanolamine, is used to quantitatively back-extract uranium from trioctylphosphine oxide in cyclohexane. This improved method yields excellent results for >1 ppm uranium in nitric and hydrochloric acid solutions of phosphate rocks, phosphoric acids, phosphate fertilizers, phosphogypsums, organic phosphates, and waste solutions. Recovery data are given for synthetic and certified standards.

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