Portable X-ray fluorescence (XRF) spectrometry offers a fast and efficient way to identify elements in environmental samples. Quantification of elements in complex matrices of soil samples, however, can be elusive for elements of low atomic mass or concentration. Standard addition offers a viable technique to alleviate such matrix problems. A Tracer III �SD (Bruker Elemental) was used to analyze over 120 soil samples from the loess hills in northwest Missouri. Plant nutrients were determined and correlated with both herbaceous and woody plant species distributions. Optimization of instrument parameters included choice of excitation window, keV filters, and use of vacuum. Metal oxides were used for primary standards to avoid further matrix complication. Background spectral features of Rh and Pd responses were monitored to verify similarity of soil matrix influences so that comparisons of peak areas were valid. Results for Ca, K, Fe, Cu, and others will be shown.

Quantification of plant nutrient elements in soil using standard addition with portable XRF

245th National Meeting (2013)

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