Analysis of standard reference materials after microwave-oven digestion in open vessels using graphite furnace atomic absorption spectrophotometry and Zeeman-effect background correction

1993 ◽  
Vol 347 (6-7) ◽  
pp. 233-237 ◽  
Author(s):  
D. Chakraborti ◽  
M. Burguera ◽  
J. L. Burguera
Keyword(s):  
Atomic Absorption ◽  
Reference Materials ◽  
Graphite Furnace ◽  
Zeeman Effect ◽  
Atomic Absorption Spectrophotometry ◽  
Microwave Oven ◽  
Background Correction ◽  
Standard Reference Materials ◽  
Absorption Spectrophotometry ◽  
Graphite Furnace Atomic Absorption

scholarly journals Determination of Chromium and Molybdenum in Medical Foods by Graphite Furnace Atomic Absorption Spectrophotometry

1995 ◽  
Vol 78 (6) ◽  
pp. 1497-1501 ◽  
Author(s):  
Edwin C Phifer
Keyword(s):  
Atomic Absorption ◽  
Graphite Furnace ◽  
Atomic Absorption Spectrophotometry ◽  
Standard Reference Materials ◽  
Absorption Spectrophotometry ◽  
Technology Standard ◽  
Relative Standard ◽  
Dry Ashing ◽  
Graphite Furnace Atomic Absorption ◽  
Medical Foods

Abstract Graphite furnace atomic absorption spectrophotometry was used to determine chromium and molybdenum in 7 medical foods from 5 manufacturers. Linear standard curves were obtained for both elements for concentrations between 5 and 25 ng/mL. Detection limits were 0.24 ng/mL for Cr and 0.67 ng/mL for Mo. Characteristic masses were 3.1 and 14.7 pg for Cr and Mo, respectively. No difference was detected between wet and dry ashing methods, and dry ashing was used to complete the study. The method was validated by assaying various National Institute of Standards and Technology standard reference materials. Analysis of these products for Cr and Mo were within certified values. One product was evaluated by this method for reproducibility (n = 5). Relative standard deviations were 6.8 and 4.8% for Cr and Mo, respectively. This product contained 0.31 ± 0.02 μg Cr/g and 0.63 ± 0.03 μg Mo/g. The remaining products contained 0.09–1.28 μg Cr/g and 0.07–2.3 μg Mo/g. Mean recovery values were 98 ± 14% (n = 14) for Cr at spike levels of 0.20–1.89 μg/g and 102 ± 24% (n = 10) for Mo at spike levels of 0.30–1.89 μg/g.

scholarly journals Determination of Selenium in Meat Products by Hydride Generation Atomic Absorption Spectrophotometry

1999 ◽  
Vol 82 (2) ◽  
pp. 364-367 ◽  
Author(s):  
Ujang Tinggi
Keyword(s):  
Atomic Absorption ◽  
Reference Materials ◽  
Meat Products ◽  
Hydride Generation ◽  
The United States ◽  
Atomic Absorption Spectrophotometry ◽  
Standard Reference Materials ◽  
Constant Attention ◽  
Absorption Spectrophotometry ◽  
Meat Samples

Abstract Wet digestion using a mixture of nitric, sulfuric, and perchloric acids and an aluminum block digester effectively and rapidly decomposed meat samples for selenium determination by hydride generation atomic absorption spectrophotometry. Digestion did not require constant attention by an operator. Selenium recoveries (range, 94-105%) from National Institute ofStandards and Technology standard reference materials and spiked samples were used to validate method accuracy. Coefficients of variation (CVs) of repeatability of in-house reference materials used forprecision study were 6.4 and 5.6%, respectively, for seafood mix and mutton liver. Selenium levels in meat products from Brisbane markets varied widely: 0.042-0.142,0.081- 0.42, and 0.050-0.198 μg/g (wet weight) respectively, for beef, chicken, and pork. Overall, selenium levels in manufactured meat ranged from0.041 to 0.189 fig/g. The levels of selenium foundinthis study were generally lower than those reported in Finland but comparable with those reported in some parts of the United States

Sign in / Sign up

Export Citation Format

Share Document