Rapid Determination of Toxic Elements in Finger Paints by Microwave Assisted Acid Digestion and Atomic Spectrometry Detection

1999 ◽  
Vol 32 (4) ◽  
pp. 771-785 ◽  
Author(s):  
Manuel Guerrero ◽  
José-Luis Todolí ◽  
Juan Mora ◽  
Antonio Canals
Keyword(s):  
Toxic Elements ◽  
Rapid Determination ◽  
Atomic Spectrometry ◽  
Acid Digestion ◽  
Microwave Assisted

Microwave-Assisted Rapid Determination of Vitamins A and E in Beverages

2003 ◽  
Vol 51 (6) ◽  
pp. 1539-1542 ◽  
Author(s):  
Ulrich Höller ◽  
Didier Wolter ◽  
Peter Hofmann ◽  
Volker Spitzer
Keyword(s):  
Rapid Determination ◽  
Microwave Assisted

scholarly journals Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS

2006 ◽  
Vol 31 (2) ◽  
pp. 7-12 ◽  
Author(s):  
V. R. Amorim Filho ◽  
W. L. Polito ◽  
S. R. Oliveira ◽  
G. P. G. Freschi ◽  
J. A. Gomes Neto
Keyword(s):  
Simultaneous Determination ◽  
Sugar Cane ◽  
Fermentation Process ◽  
Chemical Modifier ◽  
Acid Digestion ◽  
Microwave Assisted ◽  
Relative Standard ◽  
Integrated Platform ◽  
Characteristic Mass

A method has been developed for the simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation by GFAAS. The integrated platform of transversely heated graphite atomizer was treated with tungsten to form a coating of tungsten carbide. Six samples of commercial solid antibiotics were analyzed by injecting 20 µL of digested samples into the pretreated graphite platform with co-injection of 5 µL of 1000 mg L-1 Pd as chemical modifier. Samples were mineralized in a closed-vessel microwave-assisted acid-digestion system using nitric acid plus hydrogen peroxide. The pyrolysis and atomization temperatures of the heating program of the atomizer were selected as 600°C and 2200°C, respectively. The calculated characteristic mass for Cd and Pb was 1.6 pg and 42 pg, respectively. Limits of detection (LOD) based on integrated absorbance were 0.02 µg L-1 Cd and 0.7 µg L-1 Pb and the relative standard deviations (n = 10) for Cd and Pb were 5.7% and 8.0%, respectively. The recoveries of Cd and Pb added to the digested samples varied from 91% to 125% (Cd) and 80% to 112% (Pb).

Sign in / Sign up

Export Citation Format

Share Document