Authors: Sindhu Sindhu, Sonu Sharma, Manickavasagan Annamalai
Published in: CSBE-SCGAB Technical Conferences » AGM Charlottetown 2022
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Description: Glyphosate (N-(phosphonomethyl) glycine) is one of the most widely used broad-spectrum systemic herbicides for weed control spray. Irrespective of the glyphosate application time in the field, it leaves significant residue in the harvested pulses at various levels. The objective of this research was to study the feasibility of using FTIR spectroscopy in detecting glyphosate residue in intact pulses. For this purpose, six pulse types (chickpea, yellow pea, red lentil, large green lentil, French green lentil, and black beluga lentil) at five glyphosate concentration levels (0 ppm (control), 5 ppm, 10 ppm, 15 ppm, and 20 ppm) were evaluated. The FTIR spectra of pulse samples were analyzed in the wavelength range of 400–2000 cm-1. Pre-processing methods were used to develop partial least squares (PLS) regression models based on chemical reference measurements and spectral information of the samples. Furthermore, principal component analysis (PCA) models were developed based on different spectral pre-processing techniques, which resulted in the grouping of pulses according to glyphosate concentration levels. The PLS model showed strong predictive power for six pulse types, with correlation coefficients over 0.80 and root mean square error of cross-validation (RMSECV) values ranging from 0.70 to 0.82. FTIR spectroscopy has the potential to determine glyphosate residue levels in pulses and implement them in handling facilities.
Keywords: FTIR spectroscopy, Chemometric, Pulses, Non-destructive testing techniques, Pesticide residues
Conference name: CSBE/SCGAB 2022 Annual Conference, Charlottetow, PEI, 24-27 July 2022.
Session name: Food and Bioprocessing6
Publication type: Presentation
Language 1: en
Rights: Canadian Society for Bioengineering