ISO 12872:2022
Olive oils and olive-pomace oils — Determination of the 2-glyceryl monopalmitate content
This document specifies a procedure for the determination of the content, as a percentage mass fraction, of 2-glyceryl monopalmitate in olive oils and olive-pomace oils that are liquid at ambient temperature (20 °C).
NOTE This document is based on COI/T.20/Doc. No 23/Rev.1:2017[7].
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of the test sample
9 Procedure
9.1 Preparatory steps
9.2 Column chromatography
9.2.1 Conventional procedure
9.2.2 Procedure when ready-to-use silica SPE cartridges are employed
9.3 Hydrolysis with pancreatic lipase
9.4 Preparation of the silylated derivatives and gas chromatography
9.5 Gas chromatography
9.5.1 Operating conditions
9.5.2 Identification of peaks
9.5.3 Quantitative evaluation
10 Expression of results
11 Precision
11.1 Interlaboratory test
11.2 Repeatability
11.3 Reproducibility
12 Test report
Annex A (informative) Chromatograms
Annex B (informative) Results of interlaboratory test and comparison study
Annex C (informative) Preparation and activity of the lipase
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of the test sample
9 Procedure
9.1 Preparatory steps
9.2 Column chromatography
9.2.1 Conventional procedure
9.2.2 Procedure when ready-to-use silica SPE cartridges are employed
9.3 Hydrolysis with pancreatic lipase
9.4 Preparation of the silylated derivatives and gas chromatography
9.5 Gas chromatography
9.5.1 Operating conditions
9.5.2 Identification of peaks
9.5.3 Quantitative evaluation
10 Expression of results
11 Precision
11.1 Interlaboratory test
11.2 Repeatability
11.3 Reproducibility
12 Test report
Annex A (informative) Chromatograms
Annex B (informative) Results of interlaboratory test and comparison study
Annex C (informative) Preparation and activity of the lipase
Bibliography