Determination of cadmium in alcohol fuel using Moringa oleifera seeds as a biosorbent in an on-line system coupled to FAAS.
In this study a new method for determination of cadmium in alcohol fuel using Moringa oleifera seeds as a biosorbent in an on-line preconcentration system coupled to flame atomic absorption spectrometry (FAAS) was developed. Flow and chemical variables of the proposed system were optimized through multivariate designs. The limit of detection for cadmium was 5.50microg L(-1) and the precision was below 2.3% (35.0microg L(-1), n=9). The analytical curve was linear from 5 to 150microg L(-1), with a correlation coefficient of 0.9993. The developed method was successfully applied to spiked alcohol fuel, and accuracy was assessed through recovery tests, with recovery ranging from 97.50 to 100%.
Alves
Vanessa Nunes
VN
Instituto de Química, Universidade Federal de Uberlândia, Uberlândia 38400-902, MG, Brazil.
Mosquetta
Rafael
R
Coelho
Nívia Maria Melo
NM
Bianchin
Joyce Nunes
JN
Di Pietro Roux
Kalya Cravo
KC
Martendal
Edmar
E
Carasek
Eduardo
E
D000438:Alcohols / Q000737:chemistry*; D053000:Analytic Sample Preparation Methods / Q000379:methods*; D056804:Biofuels / Q000032:analysis*; D002104:Cadmium / Q000032:analysis* / Q000302:isolation & purification* / Q000378:metabolism; D029588:Moringa oleifera / Q000378:metabolism*; D009862:Online Systems; D015203:Reproducibility of Results; D012639:Seeds / Q000378:metabolism*; D013054:Spectrophotometry, Atomic
D000438:Alcohols; D056804:Biofuels; D002104:Cadmium