SEPARATION AND CHARACTERIZATION OF PIGMENTS FROM BLEACHED AND DEODORIZED CANOLA OIL

被引：13

作者：

CHAPMAN, DM

PFANNKOCH, EA

KUPPER, RJ

机构：

[1] Washington Research Center, W.R. Grace and Co.-Conn., Columbia, 7379 Rt. 32, MD

来源：

JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY | 1994年 / 71卷 / 04期

关键词：

BLEACHING; CANOLA OIL; CONJUGATED POLYUNSATURATED FATTY ACIDS; DEODORIZATION; ELECTRONIC ABSORBENCY SPECTER; HPLC; MASS SPECTRA; PIGMENTS;

D O I：

10.1007/BF02540521

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

An analysis of pigments responsible for color formation during bleaching and deodorization of canola oils treated with activated bleaching earth (ABE) or novel mineral-acid/silica (AS) adsorbents is presented. The chromophores are trace glycerides and were concentrated by silica column chromatography. The concentrated color bodies were hydrolyzed and analyzed as free acids or methyl esters by reversed phase high performance liquid chromatography with photodiode array and mass spectrometry detection, H-1 and C-13 nuclear magnetic resonance and infrared spectroscopies. Absorbance in deodorized oils is mostly from oxygenated C18 and C20 fatty acids with 1 to 4 double bonds. High-wavelength absorbance in AS-bleached oils is from conjugated pentane fatty acids that are not observed for ABE-bleached oils. Thus, both the bleaching agent and the deodorization treatment affect the distribution and concentration of such stable chromophores.

引用

页码：401 / 407

页数：7

共 30 条

[1]

ACKMAN RG, 1974, J AM OIL CHEM SOC, V51, P42, DOI 10.1007/BF00000011

[2]

BAILEY AE, 1948, COTTONSEED COTTONSEE, pCH6

[3] CHROMATOGRAPHIC ANALYSIS OF SEED OILS .2. FATTY ACID COMPOSITION OF DIMORPHOTHECA OIL [J].