scholarly journals Quantitative Determination of Trans-Fatty Acids in Oils and Fats by Capillary Gas Chromatography: Results of a JOCS Collaborative Study

2007 ◽  
Vol 56 (8) ◽  
pp. 405-415 ◽  
Author(s):  
Seiichi Shirasawa ◽  
Makoto Shiota ◽  
Hiroshi Arakawa ◽  
Yasuhiko Shigematsu ◽  
Kazuhisa Yokomizo ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Quantitative Determination ◽  
Capillary Gas Chromatography ◽  
Trans Fatty Acids ◽  
Collaborative Study

Determination of Labeled Fatty Acids Content in Milk Products, Infant Formula, and Adult/Pediatric Nutritional Formula by Capillary Gas Chromatography: Collaborative Study, Final Action 2012.13

2016 ◽  
Vol 99 (1) ◽  
pp. 210-222 ◽  
Author(s):  
Pierre-Alain Golay ◽  
Julie Moulin ◽  
M Alewijn ◽  
U Braun ◽  
L F Choo ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Infant Formula ◽  
Capillary Gas Chromatography ◽  
Collaborative Study ◽  
Internal Standard ◽  
Performance Criteria ◽  
Method Performance ◽  
Milk Products

Abstract A collaborative study was conducted on AOAC First Action Method 2012.13 “Determination of Labeled Fatty Acids Content in Milk Products and Infant Formula by Capillary Gas Chromatography,” which is based on an initial International Organization for Standardization (ISO)–International Dairy Federation (IDF) New Work Item that has been moved forward to ISO 16958:2015|IDF 231:2015 in November 2015. It was decided to merge the two activities after the agreement signed between ISO and AOAC in June 2012 to develop common standards and to avoid duplicate work. The collaborative study was performed after having provided highly satisfactory single-laboratory validation results [Golay, P.A., & Dong, Y. (2015) J. AOAC Int. 98, 1679–1696] that exceeded the performance criteria defined in AOAC Standard Method Performance Requirement (SMPR®) 2012.011 (September 29, 2012) on 12 products selected by the AOAC Stakeholder Panel on Infant Formula (SPIFAN). After a qualification period of 1 month, 18 laboratories participated in the fatty acids analysis of 12 different samples in duplicate. Six samples were selected to meet AOAC SPIFAN requirements (i.e., infant formula and adult nutritionals in powder and liquid formats), and the other Six samples were selected to meet ISO-IDF requirements (i.e., dairy products such as milk powder, liquid milk, cream, butter, infant formula with milk, and cheese). The fatty acids were analyzed directly in all samples without preliminary fat extraction, except in one sample (cheese). Powdered samples were analyzed after dissolution (i.e., reconstitution) in water, whereas liquid samples (or extracted fat) were analyzed directly. After addition of the internal standards solution [C11:0 fatty acid methyl ester (FAME) and C13:0 triacylglycerols (TAG)] to the samples, fatty acids attached to lipids were transformed into FAMEs by direct transesterification using methanolic sodium methoxide. FAMEs were separated using highly polar capillary GLC and were identified by comparison with the retention times of pure analytical standards. Quantification of fatty acids was done relative to C11:0 FAME as internal standard and to instrument response factors (determined separately using calibration standards mixture). The performance of the method (i.e., transesterification) was monitored in all samples using the second internal standard, C13:0 TAG. RSDR values were summarized separately for labeled fatty acids in SPIFAN materials and ISO-IDF materials due to different expression of results. This method was applied to representative dairy, infant formula, and adult/pediatric nutritional products and demonstrated global acceptable reproducibility precision for all fatty acids analyzed (i.e., 46 individuals and/or groups) for these categories of products.

scholarly journals Quantitative Determination of IPA and DHA in the Refined Fish Oil by Capillary Gas Chromatography. Collaborative Study and Standardization.

1996 ◽  
Vol 45 (4) ◽  
pp. 335-339 ◽  
Author(s):  
Toshiki KAJISHIMA ◽  
Shigeru AOKI ◽  
Yukari NISHIMOTO ◽  
Eiji HASEGAWA ◽  
Eiko MORIYOSHI ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Fish Oil ◽  
Capillary Gas Chromatography ◽  
Collaborative Study

scholarly journals Determination of N-Octyl Bicycloheptene Dicarboximide, Pyrethrins, and Butylcarbityl 6-Propylpiperonyl Ether in Technical Materials, Concentrates, and Finished Products by Capillary Gas Chromatography: Collaborative Study

1998 ◽  
Vol 81 (3) ◽  
pp. 503-512 ◽  
Author(s):  
Khanh T Nguyen ◽  
Richard Moorman ◽  
Virginia Kuykendall ◽  
◽  
L Bura ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Capillary Gas Chromatography ◽  
Collaborative Study ◽  
Piperonyl Butoxide ◽  
Capillary Gc ◽  
Split Injection ◽  
Flame Ionization ◽  
Accuracy And Precision ◽  
Insecticidal Compounds

abstract Nineteen collaborating laboratories (including the authors') analyzed 6 blind, duplicate pairs of various technical materials, pyrethrum extracts, concentrates, and finished products by split injection capillary gas chromatography (GC) with flame ionization detection. This procedure simultaneously quantitates with speed, ease, accuracy, and precision all 6 insecticidal compounds in pyrethrum: pyrethrin I, jasmolin I, cinerin I, pyrethrin II, jasmolin II, and cinerin II, as well as butylcarbityl 6-propylpiperonyl ether (BPE, the predominant compound in technical piperonyl butoxide, also commonly known as piperonyl butoxide) and both the endo and exo isomers of N-octyl bicycloheptene dicarboximide (MGK 264). Repeatability ranged from 4.28 to 7.22% for total pyrethrins, from 2.41 to 7.04% for BPE, and from 2.20 to 4.91 % for total MGK 264. Reproducibility ranged from 5.22 to 9.71 % for total pyrethrins, from 4.37 to 7.04% for BPE, and from 2.66 to 6.01 % for total MGK 264. The capillary GC method for these insecticidal compounds in technical materials, concentrates, and finished products has been adopted first action by AOAC INTERNATIONAL.

Quantitative Determination of Specified Chlorobiphenyls in Fish with Capillary Gas Chromatography and its use for Monitoring and Tolerance Purposes

1983 ◽  
Vol 14 (2) ◽  
pp. 147-157 ◽  
Author(s):  
Louis G. M. Th. Tuinstra ◽  
Jaap J. M. Driessen ◽  
Henk J. Keukens ◽  
Ton J. Van Munsteren ◽  
Arle H. Roos ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Capillary Gas Chromatography
Sign in / Sign up

Export Citation Format

Share Document