The quantitative analysis of triglyceride mixtures by thin layer chromatography on silica impregnated with silver nitrate

Barrett, C. B.; Dallas, M.S.J.; Padley, F. B.

doi:10.1007/bf02822471

Cited by 179 publications

(7 citation statements)

References 19 publications

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“…The unique TAG pattern provides CB specific crystal characteristics including structural polymorphism, crystallite size and shape, and dimensional distribution of network mass. Elements of total and sn-2 fatty acid compositions, and TAG profiles in previous reports (Tables 1, 2) were selected to develop mathematical model (Barrett et al, 1963;Bracco 1994;Coleman, 1961;Gunstone et al, 2007;Lipp et al, 2001;Sridhar et al, 1991;Sun et al, 2007;Swern, 1982;Tautorus and McCurdy 1990;Tchobo et al, 2009;Van Malssen et al, 1996;Zou et al, 2012) and each similarity score (G FA, G sn-2 FA, G TAG ) was calculated using the ''deducting score principle'' (Wang et al, 2009). The evaluation model is expressed as follows: Diunsaturated (SU 2 ) 9.8 9.4 9.8 9.7 10.5 8.7 7.3 -10.2 7.3 6.5 6.5-15.5…”

Section: Establishment Of Similarity Evaluation Modelmentioning

confidence: 99%

“…Others (S 3 ? U 3 ) 6.5 6.8 5.9 6.8 7.9 7.9 6.1 -1.2 0.4 0.5 0.4-9.0 CB21 and CB22 were the results of our laboratory analysis a CB1 was adapted from Barrett et al (1963); CB2 was reported by Bracco (1994); CB3-CB5 were from Gunstone et al (2007); CB6 and CB7 were adapted from Swern (1982); CB8-CB18 were from Van Malssen et al (1996); CB19 was reported by Sun et al (2007); CB20 was from Lipp et al (2001) Mango, Dhupa, Sal and Kokum were reported by Sridhar et al (1991); Shea butter was from Barrett et al (1963); Illipe butter was adapted by Coleman (1961); Pentadesma Butyracea butter (PB) was reported by Tchobo et al (2009); Palm oil and lard were adapted from Zou et al 2012; Soybean oil was from Tautorus and McCurdy (1990) a CBE1-CBE2, CBS1-CBS3, and palm mid fractions (PMF) were donated by industry sources, and analyzed in our laboratory…”

Section: Establishment Of Similarity Evaluation Modelmentioning

confidence: 99%

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Evaluation model for cocoa butter equivalents based on fatty acid compositions and triacylglycerol patterns

Jia

Shin

Lee

2019

Food Sci Biotechnol

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An effective evaluation model was established to digitize the quality of cocoa butter equivalents (CBEs) based on determinations of total and sn-2 fatty acid compositions and triacylglycerol (TAG) profiles and the ''deducting score'' principle. Similarity scores for selected fats and oils calculated from the model revealed differences between them and parallel cocoa butter compositions. For CBE1 and CBE2, total similarity scores were 90.6 and 90.0, whereas those of mango (76.3), dhupa (84.1), sal fat (84.7), kokum (78.3), palm mid fractions (PMF, 77.9), shea butter (64.0), illipe butter (89.7) and Pentadesma butyracea butter (67.2), respectively. Similarity scores were found to agree with physical properties, including polymorphism, crystal morphology, crystallization or melting behaviors, and solid fat content. The present study provides an accurate means of assessing CBE quality and hopefully will contribute to the development of commercial CBEs.

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Section: Establishment Of Similarity Evaluation Modelmentioning

confidence: 99%

Section: Establishment Of Similarity Evaluation Modelmentioning

confidence: 99%

Evaluation model for cocoa butter equivalents based on fatty acid compositions and triacylglycerol patterns

Jia

Shin

Lee

2019

Food Sci Biotechnol

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“…A severe disadvantage of argentation GC is the allowed maximum operating temperature of approximately 50 "C limiting its use to the separation of low boiling compounds (C2-ClO). Therefore, shortly afterwards, argentation-thin layer chromatography (TLC) (Barrett et al, 1962;Morris, 1962;Gupta and Dev, 1963), -paper chromatography (Barreto and Enzell, 1961), and -column chromatography (Goering et al, 1961;de Vries, 1962de Vries, , 1963 were introduced for the separation of less volatile terpenes and non-volatile lipids and fatty acids. Applications of silver salts in counter current distribution chromatography have also been described (Dutton et af., 1961).…”

Section: Introductionmentioning

confidence: 99%

Factors involved in the high pressure liquid chromatographic separation of alkenes by means of argentation chromatography on ion exchangers: Overview of theory and new practical developments

Beek

Subrtova

1995

Phytochemical Analysis

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The literature on the use and theory of silver(I) complexation (argentation) chromatography is reviewed. Apolar isomeric alkenes, for example numerous terpenes and fatty acids, can be well resolved by means of high pressure liquid chromatography on cation exchange materials coated with silver(I) ions, but unfortunately the mechanism on which these separations are based is not fully understood. As part of an attempt to provide a predictive model for the separation of volatile alkenes, the retention of more than 40 C2‐C10 olefins besides a number of C14‐pheromones and volatile terpenes is given and the results discussed. The separation is mainly governed by the type and number of double bonds (isolated, conjugated or aromatic), their steric accessibility (number and size of substituents) for complexation with silver(I) ions, the relief of inherent strain upon complexation and electron donating or withdrawing groups, or polar groups close to the double bond. Polar groups such as hydroxyls also complex weakly with silver. Other functional groups, including carbonyls, and the overall polarity of the solute play only a minor role. Similarly most solvents have only a limited influence on the selectivity and speed of separation, and function more as a transportation medium as in gas chromatography. A comparative model which gives semi‐quantitative estimations of the retention time of most volatile olefins in methanol is presented. Substituent parameters (Ags) which quantitatively forecast the influence of different alkyl side chains are part of this model.

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“…We used silver-nitrate-treated silicagel plate for determining whether the unknown fraction was saturated or unsaturated (2).…”

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confidence: 99%

The Presence of Cis‐9,10‐Methylene Hexadecanoic Acid in Yersinia enterocolitica

Kanemasa¹,

Nagamachi

Shibuya

1991

Microbiology and Immunology

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The fatty acids of Yersinia enterocolitica were investigated by Abbas and Card. In their report, they stated that the major fatty acids were C16:0, C16:1, C17:0 and C18: 1 and branched or cyclopropane side-chain fatty acids could not be detected. We, however, found a moderate amount of cyclopropane side-chain fatty acid. We could determine that this fatty acid was cis-9, 10-methylene hexadecanoic acid by gas-liquid chromatography, gas chromatography-mass spectrometry, silvernitrate-treated TLC and PtO2 catalyzing hydrogenation method.Y. enterocolitica is one of the enteric bacteria, which grows in a broad range of temperature, 4-45 C. It is well known that such bacteria maintain the fluidity and stability of their membrane by changing the lipid composition following the change in growth temperature.From this point of view, we have analyzed the lipids of Y. enterocolitica.Abbas and Card, using Y. enterocolitica TN559582 strain, analyzed splendidly the fatty acid change following the change in growth temperature and found that unsaturated fatty acids increased relatively when the growth temperature decreased and saturated fatty acids increased relatively when the temperature increased (1).In their report, they stated that the major fatty acids were C16:0, C16: 1, C17:0 and C18:1, and branched or cyclopropane side-chain fatty acids could not be detected. We, however, found a moderate amount of cyclopropane side-chain fatty acids through our investigation.Y. enterocolitica Ye3827 (presented from Prof. Misao Tsubokura, Dept. of Veterinary Microbiology, Faculty of Agriculture, Tottori University) was cultured by shaking in heart-infusion broth at 25 C, the optimum-growth temperature. The cells were harvested at the late log phase and washed in cold 0.85% saline. Membrane fraction was obtained by ultracentrifugation after the cells were broken up with French press. The lipids were extracted with chloroform-methanol (2: 1, v/v) and purified by Folch's method (3). Phospholipid composition was analyzed by two-dimensional chromatography on Kieselgel 60G plate (4). The solvent system used was chloroform-methanol-water (65: 25: 4, v/v/v) in the first direction and chloroform-77

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The quantitative analysis of triglyceride mixtures by thin layer chromatography on silica impregnated with silver nitrate

Cited by 179 publications

References 19 publications

Evaluation model for cocoa butter equivalents based on fatty acid compositions and triacylglycerol patterns

Evaluation model for cocoa butter equivalents based on fatty acid compositions and triacylglycerol patterns

Factors involved in the high pressure liquid chromatographic separation of alkenes by means of argentation chromatography on ion exchangers: Overview of theory and new practical developments

The Presence of Cis‐9,10‐Methylene Hexadecanoic Acid in Yersinia enterocolitica

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