6533b871fe1ef96bd12d11af
RESEARCH PRODUCT
Prediction of organic carbon and total nitrogen contents in organic wastes and their composts by Infrared spectroscopy and partial least square regression
M. De La GuardiaG. El Kadiri BoutchichMaria Luisa CerveraS. TahiriM. El KratiSalvador GarriguesM. SisouaneMercedes Cascantsubject
Total organic carbonMean squared errorChemistryAnalytical chemistryInfrared spectroscopy04 agricultural and veterinary sciences010501 environmental sciencesResidual01 natural sciencesCross-validationAnalytical ChemistryAttenuated total reflectionPartial least squares regression040103 agronomy & agricultureTotal nitrogen0401 agriculture forestry and fisheries0105 earth and related environmental sciencesdescription
Middle and near infrared (MIR and NIR) were employed to determine organic carbon (OC) and total nitrogen (TN) in different soil organic amendments including wastes, composts and mixtures of composts and organic wastes. Prediction models based on partial least squares (PLS) regression from the spectra of untreated samples were built. Different spectra preprocessing strategies were adopted and the best number of latent variable was evaluated using leave-one-out cross-validation. Attenuated total reflectance (PLS-ATR-MIR) and diffuse reflectance (PLS-DR-NIR) models were built and evaluated from root mean square error of cross validation and prediction (RMSECV and RMSEP), coefficients of determination for prediction (R2 pred) and residual predictive deviation (RPD). ATR-MIR provided a better prediction capability than DR-NIR with RMSEP, R2pred and RPD values of 2.2%, 0.76 and 2.0 for OC and values of 0.2%, 0.82 and 2.4 for TN, respectively.
year | journal | country | edition | language |
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2017-05-01 | Talanta |