Work

SB-ATR FTIR Spectroscopic Monitoring of Free Fatty Acids in Commercially AvailableNigella sativa(Kalonji) Oil

Year: 2014

Type: article

Abstract: Free fatty acids (FFA) inNigella sativa(N. sativa) commercial and seed oil were determined using single-bounce attenuated total reflectance (SB-ATR) Fourier transform infrared (FTIR) spectroscopy. Gravimetrical mixing was done by adding 0.1–40% oleic acids in neutralizedN. sativaoil containing 0.1% FFA. FTIR spectroscopy technique and partial least square (PLS) calibration were used to detect the absorption region of carbonyl (C=O) which is in the range of 1690–1727 cm−1. The results of PLS calibration model and root mean square error of calibration (RMSEC) are 0.999 and 0.449, respectively. Comparing the FFA obtained inN. sativaoil by using FTIR with the FFA obtained using AOCS titrimetric method shows a positive correlation and confirms that the described method is a useful procedure.

Source: Journal of Spectroscopy

DOI: 10.1155/2014/510890

Authors: S. A. Mahesar, Aftab A. Kandhro, Abdul Rauf Khaskheli, M. Y. Talpur, S. T. H. Sherazi

Institutions: University of Sindh, National Centre of Excellence in Analytical Chemistry, Shaheed Mohtarma Benazir Bhutto Medical University

Language: English

Topic: Spectroscopy and Chemometric Analyses

Subfield: Analytical Chemistry

Field: Chemistry

Domain: Physical Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $1,630