Quantification of mineral composition of Brazilian bee pollen by near infrared spectroscopy and PLS regression

Author(s)

Costa, Maria Cristina A. ; Morgano, Marcelo A. ; Ferreira, Marcia Miguel C. ; Milani, Raquel F.

• Document type: Journal article
• Source: Food Chemistry; v. 273, p. 6-pg., 2019-02-01.

Abstract

Bee pollen consumption has increased in the last years, mainly due to its nutritional value and therapeutic applications. The quantification of mineral constituents is of great importance in order to evaluate both, the toxicity and the beneficial effect of essential elements. The purpose of this work was to quantify the essential elements, Ca, Mg, Zn, P and K, by diffuse reflectance spectra in the near infrared region (NIR) combined with partial least squares regression (PLS), which is a clean and fast method. Reference method used was ICP OES. The determination coefficients for calibration models (R-2) were above 0.87 and the mean percent calibration error varied from 5 to 10%. For external validation R-2 values were higher than 0.76. The results indicated that NIR spectroscopy can be useful for an approximate quantification of these minerals in bee pollen samples and can be used as a faster alternative to the standard methodologies. (AU)

• FAPESP's process: 15/22951-2 - Theoretical Studies of bioactive substances Molecular modeling and QSAR (2D and 4D) studies of: A) 1,4 Naftoquinones derivatives with Antileucemic activity. B) Herbicides 3-benzil-5-arilidenofuran-2(5H)-one and Trifluoromethyl Arylamides
• Grantee: Marcia Miguel Castro Ferreira
• Support Opportunities: Regular Research Grants