GB/T 11540-2008Fragrance/Flavor substances -- Determination of relative density (English PDF)

Foreword

This standard is modified using ISO 279.1998 "Essential oils - Determination of

relative density at 20 °C - Reference method", the main differences between

this standard and ISO 279.1998 are as follows.

- DELETE the sampling method of ISO 279.1998;

- ADD the determination of the relative density of single and synthetic

fragrance substance, as well as the conversion formula of relative density

at t' temperature and t temperature;

- ADD the densitometer operating procedures (Appendix A) and Westphal

scale method (Appendix B).

This standard is the combination and revision of GB/T 11540-1989 "Single and

synthetic fragrance substance - Determination of the relative density" and GB/T

14455.4-1993 "Essential oils - Determination of relative density". The main

change of this standard is the addition of densitometer operating procedures.

The Appendix A, Appendix B of this standard are normative appendixes.

This standard was proposed by the China Light Industry Federation.

This standard shall be under the jurisdiction of the National Spice Cosmetics

Standardization Technical Committee.

This standard was responsibly drafted by Shanghai Institute of Spices.

1 Scope

This standard specifies the method of determining the relative density of spices

at a certain temperature.

This standard applies to the determination of the relative density of essential

oils, single and synthetic spices.

2 Normative references

The provisions in following documents become the provisions of this Standard

through reference in this Standard. For the dated references, the subsequent

amendments (excluding corrections) or revisions do not apply to this Standard;

however, parties who reach an agreement based on this Standard are

encouraged to study if the latest versions of these documents are applicable.

For undated references, the latest edition of the referenced document applies.

GB/T 14454.1 Spices - Specimen preparation (GB/T 14454.1-2008, ISO

356.1996, MOD)

3 Terms and definitions

The following terms and definitions apply to this standard.

3.1

Relative density

The ratio of the mass of spices of a certain volume to the mass of the distilled

water of the same volume at same temperature, at a certain temperature

(t °C).

Note. It is represented by the symbol , without unit.

3.2

Absolute density

8 Operating procedures

9 Results expression