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BS ISO 17780:2015

BS ISO 17780:2015

$167.15

Animal and vegetable fats and oils. Determination of aliphatic hydrocarbons in vegetable oils

Published By Publication Date Number of Pages
BSI 2015 40
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This International Standard specifies a method for the determination of saturated aliphatic hydrocarbons from C10 to C56 of natural origin present in vegetable oils, and for detecting the presence of mineral oil and diesel oil.

The method is applicable to all types of crude and refined edible oils and fats, for concentrations of mineral oils from 50 mg/kg to 1 000 mg/kg.

A rapid method for refined and virgin (or cold-pressed) oils is proposed in Annex C. This rapid method is not adapted for crude oils due to a lack of retention of triglycerides observed for some samples.

A method for fat recovery from food samples by soxhlet extraction with a blend of solvents is proposed in Annex D.

PDF Catalog

PDF Pages PDF Title
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Principle
5 Reagents
11 6 Apparatus
12 7 Sampling
13 8 Preparation of the test sample
9 Procedure
9.1 Chromatography column preparation
9.1.1 Preparation of AgNO3 impregnated silica gel
9.1.2 Column packing
9.2 Elution of the hydrocarbon fraction
14 9.3 Gas chromatography
9.3.1 Gas chromatography setup
9.3.2 Working conditions for gas chromatography analysis
9.3.3 Peak identification
15 9.3.4 Performance of the gas chromatography system
9.4 Procedural blank
9.5 Quantitative determination
19 10 Determination of hydrocarbons attributed to mineral origin
11 Precision
11.1 Interlaboratory test
11.2 Repeatability
11.3 Reproducibility
12 Test report
20 Annex A (informative) Examples of chromatograms
25 Annex B (informative) Validation of silver nitrate impregnated silica gel purification
27 Annex C (informative) Procedure for rapid method
31 Annex D (informative) Fat extraction from food sample
34 Annex E (informative) Results of interlaboratory trials
37 Bibliography

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BS ISO 17780:2015
$167.15