Simultaneous determination of cobalt and manganese in urine by electrothermal atomic absorption spectrometry. Method development using a simplex optimization approach

1996 ◽  
Vol 11 (8) ◽  
pp. 591 ◽  
Author(s):  
Bent Schack Iversen ◽  
Antonia Panayi ◽  
Juan Pablo Camblor ◽  
Enrico Sabbioni
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Simultaneous Determination ◽  
Method Development ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Optimization Approach ◽  
Spectrometry Method ◽  
Simplex Optimization

scholarly journals Determination of Chromium in Biological Material by Electrothermal Atomic Absorption Spectrometry Method

2012 ◽  
Vol 56 (4) ◽  
pp. 585-589 ◽  
Author(s):  
Agnieszka Nawrocka ◽  
Józef Szkoda
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Certified Reference Materials ◽  
Graphite Furnace ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Magnesium Nitrate ◽  
Spectrometry Method ◽  
Total Chromium

Abstract Procedure for determination of chromium in biological materials by Zeeman graphite furnace atomic absorption spectrometry method using a Perkin-Elmer spectrometer equipped with hollow-cathode lamp at 357.9 nm was developed. The samples of animal tissues, food, and feed were digested in muffle furnace at 450ºC. The ash was dissolved in 1 N hydrochloric acid and the final solution was diluted in 0.2% nitric acid. Magnesium nitrate (1%) was used as a matrix modifier. The method was validated in terms of basic analytical parameters. The mean recoveries of chromium was 84.4% for muscle, 79.0% for canned meat, and 80.2% for feed, and analytical detection limit was 0.003 μg/g. Certified reference materials were used for analytical quality assurance. The proposed analytical procedure is well adapted for monitoring chromium content in food and feedstuffs. Content of total chromium in the tested samples (animal muscles and liver) was low and was situated in the range of 0.031-0.101 mg/kg (muscles) and 0.047-0.052 mg/kg (liver).

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