Rapid determinations of dissolved inorganic and organic nitrogen in soil leachate using mid-infrared spectroscopy
Citation
Yang, X.M., Drury, C.F., Xu, W., Reeb, M., Oloya, T. (2019). Rapid determinations of dissolved inorganic and organic nitrogen in soil leachate using mid-infrared spectroscopy. Canadian Journal of Soil Science, [online] 99(4), 579-583. http://dx.doi.org/10.1139/cjss-2019-0116
Plain language summary
This study found that the mid-infrared technique can be recommended as a fast and inexpensive method to simultaneously determine inorganic N, organic N, and total N concentrations in water or low salt concentration solution systems.
Abstract
Mid-infrared spectroscopy in the transmission mode was used to predict inorganic nitrogen (N), organic N, and total N in soil leachate. The developed predictions were accurate and robust for total N, NH4+, NO3−, inorganic N (NH4+ + NO3− ), and organic N (total N − inorganic N) with high determination coefficients (R2 = 96.7 − 99.0) and residual prediction deviation (RPD = 5.47 − 9.96). The proposed method simultaneously estimates the concentrations of dissolved nitrogen species in soil leachates accurately and with significant savings in time, cost, and chemicals relevant to conventional methods.