ULTRASOUND-ASSISTED EXTRACTION FOR COLORIMETRIC DETERMINATION OF IRON IN SOIL: A COMPARISON WITH INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY

Paula Cristiana de Freitas, Rui Miguel de Carvalho, Jessee Severo Azevedo Silva, Thiago Prado, Elis Regina Duarte, Vera L. A. Frescura, Eduardo S. Chaves
2015 Química Nova  
ultrasound-assisted extraction and colorimetric determination of iron in soil samples was developed. The iron concentration in the analyzed samples was determined by the colorimetric method and the results compared with inductively coupled plasma mass spectrometry (ICP-MS). Fifteen soil samples were analyzed and the iron concentration results compared with those obtained by ICP-MS using microwave-assisted sample digestion. The proposed procedure showed good efficiency for iron extraction and
more » ... n extraction and the results obtained by colorimetric determination exhibited good agreement with ICP-MS. Moreover, ultrasound-assisted extraction and colorimetric determination is a simple, fast and low-cost procedure for application in routine analysis.
doi:10.5935/0100-4042.20150021 fatcat:xi6sdvvwojbj5pekkn5fnk5qiy