“…[7][8][9][10] Based on chromatographic techniques, some robust methods for resolving FFA in rice bran oil, corn oil, sesame oil and soybean oil were successfully developed. 6,[11][12][13][14] Another high-speed colorimetry method was developed to determine FFA in oils with synthetic polyamidoamine dendrimers and citrate-capped gold nanoparticles. 3 A number of spectroscopic methods, such as UV-vis, H-1-nuclear magnetic resonance, and molecular spectroscopy, are used in the detection of FFA in vegetable oils.…”