23348-U

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Showing 1-16 of 16 results for "23348-U" within Papers

Temperature-sensitive resolution of cis- and trans-fatty acid isomers of partially hydrogenated vegetable oils on SP-2560 and CP-Sil 88 capillary columns.

W M Nimal Ratnayake et al.

Journal of AOAC International, 85(5), 1112-1118 (2002-10-11)

This study examines the effect of the column operating temperature of 100 m SP-2560 and CP-Sil 88 capillary gas chromatographic (GC) columns on the separation of cis- and trans-octadecenoic (18:1) isomers in partially hydrogenated vegetable oils. The overlapping GC peaks

Factors affecting variations in the detailed fatty acid profile of Mediterranean buffalo milk determined by 2-dimensional gas chromatography.

S Pegolo et al.

Journal of dairy science, 100(4), 2564-2576 (2017-02-13)

Buffalo milk is the world's second most widely produced milk, and increasing attention is being paid to its composition, particularly the fatty acid profile. The objectives of the present study were (1) to characterize the fatty acid composition of Mediterranean

Photochemical production of conjugated linoleic acid from soybean oil.

R R Gangidi et al.

Lipids, 39(6), 577-582 (2004-11-24)

Conjugated linoleic acid (CLA), an anticarcinogenic compound with numerous other health benefits, is present mainly in dairy and beef lipids. The main CLA isomer present in dairy and beef lipids is cis 9, trans 11 CLA at a 0.5% concentration.

Determination ofcis andtrans-Octadecenoic acids in margarines by gas liquid chromatography-infrared spectrophotometry.

Ratnayake, W. M. N., et al.

Journal of the American Oil Chemists' Society, 67, 804-810 (1990)

Determination of elaidic and vaccenic acids in foods using GC×GC-FID and GC×GC-TOFMS.

Jaeho Ha et al.

Talanta, 85(1), 252-258 (2011-06-08)

Trans fatty acids (TFAs) are present in meat and dairy products as m ruminant animals and in vegetable fats due to partial hydrogenation. This study aimed to discriminate between natural (N-TFA) and hydrogenated trans fatty (H-TFA) acids by GC×GC-flame ionization

Inconsistencies in a highly polar capillary gas chromatography column and necessity of column performance checks for trans fatty acid measurement.

Wakako Tsuzuki

Journal of AOAC International, 95(6), 1740-1743 (2013-03-05)

GC with a capillary column (60-100 m length) is widely used to measure trans fatty acids in dietary fats and biological tissues. Recently, we have occasionally observed that isothermal operation of an SP-2560 column at 180 degrees C results in

Separation characteristics of fatty acid methyl esters using SLB-IL111, a new ionic liquid coated capillary gas chromatographic column.

Pierluigi Delmonte et al.

Journal of chromatography. A, 1218(3), 545-554 (2010-12-24)

The ionic liquid SLB-IL111 column, available from Supelco Inc., is a novel fused capillary gas chromatography (GC) column capable of providing enhanced separations of fatty acid methyl esters (FAMEs) compared to the highly polar cyanopropyl siloxane columns currently recommended for

[Determination of docosahexaenoic acid in milk powder by gas chromatography using acid hydrolysis].

Shiping Shao et al.

Se pu = Chinese journal of chromatography, 33(11), 1214-1218 (2016-03-05)

A method to determine docosahexenoic acid (DHA) in milk powder by gas chromatography was established. The milk powder samples were hydrolyzed with hydrochloric acid, extracted to get total fatty acids by Soxhlet extractor, then esterified with potassium hydroxide methanol solution

Effects of total replacement of corn silage with sorghum silage on milk yield, composition, and quality.

M Cattani et al.

Journal of animal science and biotechnology, 8, 15-15 (2017-02-07)

In the last years, difficulties occurring in corn cultivation (i.e., groundwater shortages, mycotoxin contamination) have been forcing dairy farmers to consider alternative silages. Some experiments conducted on lactating cows have proven that the total replacement of corn silage with sorghum

Evaluation of use of a dicationic liquid stationary phase in the fast and conventional gas chromatographic analysis of health-hazardous C18 cis/trans fatty acids.

Carla Ragonese et al.

Analytical chemistry, 81(13), 5561-5568 (2009-06-02)

The present research is focused on the evaluation of one 0.10 mm i.d. and two 0.25 mm i.d., ionic liquid (IL) stationary phase [1,9-di(3-vinyl-imidazolium) nonane bis(trifluoromethyl) sulfonyl imidate] columns, with lengths of 12 (the microbore capillary), 30 and 100 m

Evaluating the in vitro metabolism of docosahexaenoic acid in sheep rumen fluid.

Noelia Aldai et al.

Lipids, 47(8), 821-825 (2012-06-15)

Rumen metabolism (e.g., biohydrogenation) of dietary unsaturated fatty acids (FA) is one of the main reasons why ruminant fats tend to be highly saturated and contain many isomerized FA intermediates. The process by which long-chain (20- to 24-carbon FA) polyunsaturated

Evidence for the Initial Steps of DHA Biohydrogenation by Mixed Ruminal Microorganisms from Sheep Involves Formation of Conjugated Fatty Acids.

Noelia Aldai et al.

Journal of agricultural and food chemistry, 66(4), 842-855 (2018-01-02)

Incubation of DHA with sheep rumen fluid resulted in 80% disappearance in 6 h. The products were analyzed as their fatty acid (FA) methyl esters by GC-FID on SP-2560 and SLB-IL111 columns. The GC-online reduction × GC and GC-MS techniques

Properties of trans isomers of eicosapentaenoic acid and docosahexaenoic acid methyl esters on cyanopropyl stationary phases.

Svein A Mjøs

Journal of chromatography. A, 1100(2), 185-192 (2005-10-21)

The trans isomers of 5,8,11,14,17-eicosapentaenoic acid (EPA) and 4,7,10,13,16,19-docosahexaenoic acid (DHA) methyl esters were prepared by isomerisation with paratoluenesulfinic acid (PTSA) in dioxane. The isomers were fractionated by silver ion liquid chromatography with baseline resolution between the isomers with different

Resolution behavior of cis- and trans-octadecenoic acid isomers by AOCS official method using SP-2560 column.

Kazuaki Yoshinaga et al.

Journal of oleo science, 62(10), 781-788 (2013-10-04)

The gas chromatography-flame ionization detector equipped with a higher polarity column (i.e., SP-2560) has often been used for the quantification of trans-fatty acids in food. In particular, AOCS Ce 1h-05, the official method of the American Oil Chemists' Society (AOCS)

Determination of trans unsaturation by infrared spectrophotometry and determination of fatty acid composition of partially hydrogenated vegetable oils and animal fats by gas chromatography/infrared spectrophotometry: collaborative study.

W M Ratnayake

Journal of AOAC International, 78(3), 783-802 (1995-05-01)

An infrared spectrophotometric (IR) method for the determination of total trans unsaturated fatty acid (trans) content and a combined gas-liquid chromatographic/infrared spectrophotometric (GC/IR) method for determination of fatty acid composition of partially hydrogenated vegetable oils (PHVO) were studied collaboratively in

Comparison of separations of fatty acids from fish products using a 30-m Supelcowax-10 and a 100-m SP-2560 column.

Viviana Santercole et al.

Lipids, 47(3), 329-344 (2012-01-17)

Commercial fish oils and foods containing fish may contain trans and/or isomerized fatty acids (FA) produced during processing or as part of prepared foods. The current American Oil Chemists' Society (AOCS) official method for marine oils (method Ce 1i-07) is

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