Determination of erbium by electrothermal atomic absorption spectrometry using a pyrolytic graphite coated graphite tube and a pyrolytic graphite coated graphite tube lined with tantalum foil, held in place by a tungsten spiral

1992 ◽  
Vol 7 (1) ◽  
pp. 35 ◽  
Author(s):  
Ma Yi-zai ◽  
Bai Jian ◽  
Sun Di-jun
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Pyrolytic Graphite ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Tantalum Foil ◽  
Graphite Tube ◽  
Tungsten Spiral

scholarly journals Determination of Lithium in Human Serum by Electrothermal Atomic Absorption Spectrometry

2000 ◽  
Vol 83 (2) ◽  
pp. 377-381 ◽  
Author(s):  
Sara González ◽  
Miguel Navarro ◽  
Herminia López ◽  
María C López ◽  
Vidal Pérez
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Human Subjects ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Lithium Carbonate ◽  
Graphite Tube ◽  
Serum Samples ◽  
Triton X

Abstract An efficient method was developed for the determination of nanogram levels of lithium in biological samples. Serum samples from human subjects from southeastern Spain, treated or not treated with lithium carbonate, were analyzed by electrothermal atomic absorption spectrometry. The samples were previously treated with a matrix modifier consisting of 0.1%Triton X-100 and injected through a graphite tube with L'vov platform. The Li concentrations measured by the procedure described for the 3 certified reference samples used were not significantly different (p > 0.05) than certified levels. Sample recoveries and variability during several days, with coefficients of variation from 4.00 to 14.8%, demonstrated the reliability and accuracy of this technique. Mean Li concentration determined in the serum of individuals with psychiatric disorders treated with Li (n = 117, 5.077 ± 1.795 μg Li/mL) was significantly higher (p < 0.001) than that in individuals not treated with Li (n = 24, 1.902 ± 2.054 ng Li/mL).

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