Journal of Environmental Analytical Chemistry

Samuel W Roa-Lauby

Publications

• Research Article
  Elemental Analysis of Nutrients in Dairy Manure by Automated X-ray Fluorescence Spectrometry
  Author(s): Aicardo Roa-Espinosa, John L Markley, Trang T Vu, Evgeny Filatov and Samuel W Roa-LaubyAicardo Roa-Espinosa, John L Markley, Trang T Vu, Evgeny Filatov and Samuel W Roa-Lauby
  
  We have determined that X-ray fluorescence (XRF) spectrometry can be used as a rapid and precise method for quantitative elemental analysis of macro and micro nutrients in dairy manure. The elements chosen for this study were N, P, K, Ca, Mg, S, Zn, Mn, Fe, Cu, Al, Na, B, and C. The wavelength-dispersive XRF spectrometer was calibrated by comparing its results with a panel of dried dairy manure samples with analyses from inductively coupled plasma (ICP) obtained from three independent certified laboratories. In addition, the XRF results for C, N, and S were compared with those from a high-temperature combustion (HTC) analyzer dedicated to measurements of these three elements. Then the performance of the calibrated XRF was tested against a separate panel of dairy manure samples collected at fifteen different sampling points at a manure processing plant. Subsamples from these samples we.. Read More»
  DOI: 10.4172/2380-2391.1000173

  Abstract PDF