Evaluation of techniques for determination of molybdenum in sugarcane leaves

In crops of the sugarcane, the concentrations of molybdenum (Mo) in the leaves are generally lower than 0.3 mg Mo kg(-1). These low concentrations have resulted in limitations in the methods and instruments that can be used for these analyses. The objective of this study was to evaluate three differ...

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Bibliographic Details
Published inCommunications in soil science and plant analysis Vol. 37; no. 1-2; pp. 77 - 91
Main Authors Polidoro, J.C, Medeiros, A.F.A, Xavier, R.P, Medeiros, J.A, Boddey, R.M, Alves, B.J.R, Urquiaga, S
Format Journal Article
LanguageEnglish
Published Philadelphia, PA Taylor & Francis Group 01.02.2006
Taylor & Francis
Subjects
accuracy
Agronomy. Soil science and plant productions
Biological and medical sciences
Colorimetry
direct coupled plasma
Fundamental and applied biological sciences. Psychology
inductively coupled plasma
leaves
measurement
mineral content
molybdenum
molybdenum determination
precision
quantitative analysis
Saccharum officinarum
spectrometers
spectroscopy
sugarcane
South America
Brazil
America
Saccharum
Monocotyledones
Colorimetry
Plant leaf
Inductive coupling plasma spectrometry
Molybdenum
Sugar plant
sugarcane
Analysis method
Gramineae
Angiospermae
Spermatophyta
Sugar cane
direct coupled plasma
inductively coupled plasma
molybdenum determination
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Summary:In crops of the sugarcane, the concentrations of molybdenum (Mo) in the leaves are generally lower than 0.3 mg Mo kg(-1). These low concentrations have resulted in limitations in the methods and instruments that can be used for these analyses. The objective of this study was to evaluate three different techniques to determine the concentration of Mo in sugarcane leaves sampled in the principal sugarcane-producing areas in Brazil. Two spectrometric techniques were evaluated by using ICP-EAS (Inductively Coupled Plasma-Emission Automated System) and DCP-MEAS (Direct Coupled Plasma-Multiple Emission Automated System) and a colorimetric technique of the reaction between potassium iodide and hydrogen peroxide (KI-H2O2). The techniques ICP-EAS and KI-H2O2 produced results of satisfactory accuracy and precision, whereas the DCP-MEAS consistently overestimated the Mo concentrations in cane leaves. The KI-H2O2 technique showed sensitivity 5 times greater than the ICP-EAS, with minimum detection limits of 0.1 and 0.5 mg Mo kg(-1), respectively.
ISSN:0010-3624
1532-2416
DOI:10.1080/00103620500408753