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BS EN 14112:2016

BS EN 14112:2016

$142.49

Fat and oil derivatives. Fatty Acid Methyl Esters (FAME). Determination of oxidation stability (accelerated oxidation test)

Published By Publication Date Number of Pages
BSI 2016 24
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This European Standard specifies a method for the determination of the oxidation stability of fatty acid methyl esters (FAME) at 110 °C, by means of measuring the induction period up to 48 h.

NOTE 1

EN 15751 [1] describes a similar test method for oxidation stability determination of pure fatty acid methyl esters and of blends of FAME with petroleum-based diesel containing 2 % (V/V) of FAME at minimum.

NOTE 2

The precision statement of this test method was determined in a Round Robin exercise with induction periods up to 8,5 h, thus covering the limit value in EN 14214 . Results from precision studies on EN 15751 indicate that the precision statement is valid for induction periods up to 48 h but not for higher values.

NOTE 3

Limited studies on EN 15751 with EHN (2-ethyl hexyl nitrate) on FAME blends indicated that the stability is reduced to an extent which is within the reproducibility of the test method. It is likely that the oxidation stability of pure FAMEs is also reduced in the presence of EHN when EN 14112 is used for testing.

PDF Catalog

PDF Pages PDF Title
5 European foreword
6 Introduction
7 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
8 5 Reagents and materials
6 Apparatus
9 Figure 1 — Apparatus
10 Figure 2 — Diagrammatic representation of heating block, reaction vessel and measurement cell
7 Sampling
11 8 Preparation of measurement
8.1 Preparation of test sample
8.2 Preparation of apparatus
8.2.1 Cleaning procedure
8.2.2 Temperature correction
8.2.2.1 General
8.2.2.2 Procedure
12 9 Measurement
14 Figure 3 — Measurement termination indications
15 10 Calculation and Evaluation
10.1 Automatic evaluation
16 Figure 4 — Evaluation indications
17 Figure 5 — Indication for insufficient cleaning
Figure 6 — Indication for rapid initial conductivity increase
10.2 Manual evaluation
18 11 Expression of results
12 Precision
12.1 General
12.2 Repeatability, r
12.3 Reproducibility, R
13 Test report
20 Annex A (informative) Background of the method
21 Annex B (informative) Results of an Interlaboratory Study
Table B.1 — Thermal oxidation stability
22 Bibliography

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BS EN 14112:2016
$142.49