ISO 6883:2017
Animal and vegetable fats and oils — Determination of conventional mass per volume (litre weight in air)
ISO 6883:2017 specifies a method for the determination of the conventional mass per volume ("litre weight in air") of animal and vegetable fats and oils (hereinafter referred to as fats) in order to convert volume to mass or mass to volume.
The procedure is applicable to fats only when they are in a liquid state. Milk and milk products (or fat coming from milk and milk products) are excluded from the scope of this document.
NOTE The determination of conventional mass per volume (litre weight in air) using the oscillating U-tube method can be found in ISO 18301.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling
7 Preparation of test sample
8 Procedure
8.1 Calibration of pyknometer
8.2 Determination
8.2.1 General
8.2.2 Fats which are solid at ambient temperatures
8.2.3 Using the Jaulmes pyknometer
8.2.4 Using the Gay-Lussac pyknometer
9 Expression of results
9.1 Calculation of the volume of the pyknometer
9.2 Calculation of the conventional mass per volume
10 Precision
10.1 Interlaboratory tests
10.2 Repeatability
10.3 Reproducibility
11 Test report
Annex A (informative) Results of interlaboratory tests
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling
7 Preparation of test sample
8 Procedure
8.1 Calibration of pyknometer
8.2 Determination
8.2.1 General
8.2.2 Fats which are solid at ambient temperatures
8.2.3 Using the Jaulmes pyknometer
8.2.4 Using the Gay-Lussac pyknometer
9 Expression of results
9.1 Calculation of the volume of the pyknometer
9.2 Calculation of the conventional mass per volume
10 Precision
10.1 Interlaboratory tests
10.2 Repeatability
10.3 Reproducibility
11 Test report
Annex A (informative) Results of interlaboratory tests
Bibliography