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Correlation between total and EDTA/DTPA-extractable trace elements in soil and wheat.
Biological Trace Element Research
|February 17, 2000
Summary
Wheat consumption varies globally, with Turkish diets featuring higher intake. Trace element analysis in Turkish wheat revealed soil-derived elements strongly correlated, while atmospheric pollutants like arsenic and selenium showed less correlation with soil sources.
Area of Science:
- Agricultural Science
- Environmental Chemistry
- Food Science
Background:
- Wheat is a crucial dietary staple, providing essential energy and nutrients globally.
- Significant regional differences exist in wheat consumption, with Turkey showing notably high daily intake.
- Understanding trace element content in wheat is vital for nutritional and environmental assessments.
Purpose of the Study:
- To determine the trace element composition of wheat samples from different Turkish regions.
- To investigate the relationship between soil trace element content and wheat accumulation.
- To differentiate between soil-derived and anthropogenic sources of trace elements in wheat.
Main Methods:
- Instrumental Neutron Activation Analysis (INAA) for trace element analysis in wheat and soil.
- Atomic Absorption Spectrometry (AAS) for soil analysis (total, EDTA-extractable, and DTPA-extractable elements).
- Correlation analysis and enrichment factor calculations to assess element sources.
Main Results:
- Strong positive correlations were observed between soil-derived trace elements (e.g., Sc, La, Sm, Rb, K) in wheat.
- Selenium (Se) concentrations exhibited significant regional variability.
- Trace elements with anthropogenic sources, such as Arsenic (As) and Selenium (Se), showed no significant correlation with soil content.
Conclusions:
- Wheat's trace element profile is significantly influenced by soil composition for soil-derived elements.
- Regional variations in Se concentration suggest complex uptake mechanisms or diverse sources.
- Atmospheric deposition plays a minor role in the accumulation of As and Se in wheat compared to soil influence.
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