Determination of macro- and micronutrients in plant leaves by high-resolution continuum source flame atomic absorption spectrometry combining instrumental and sample preparation strategies |
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| Authors: | Silvana R. Oliveira,José A. Gomes Neto,Joaquim A. Nó brega,Bradley T. Jones |
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| Affiliation: | 1. São Paulo State University – Unesp, Analytical Chemistry Department, P.O. Box 355, 14801-970, Araraquara – SP, Brazil;2. Federal University of São Carlos, Department of Chemistry, 13560-970, São Carlos – SP, Brazil;3. Wake Forest University, Department of Chemistry, P.O. Box 7486, Winston-Salem – NC, United States |
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| Abstract: | ![]()
A method for determination of B, Ca, Cu, Fe, K, Mg, Mn, Mo, P, S and Zn in plant tissues by high-resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS) is proposed. This method is based on special features of HR-CS-AAS, such as side pixel registration, wavelength integrated absorbance, and molecular absorption bands, for determining macro- and micronutrients in foliar analysis without requiring several different strategies for sample preparation and adjustment of the analytes concentration ranges. Plant samples were analyzed and results for certified materials were in agreement at a 95% confidence level (paired t-test) with reference values. Recoveries of analytes added to plant digests varied within the 82–112% interval. Relative standard deviations (n = 12) were lower than or equal to 5.7% for all analytes in all concentration ranges. |
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| Keywords: | High-resolution continuum source flame atomic absorption spectrometry Foliar diagnosis Macronutrients Micronutrients |
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