GB/T 11539-2008Fragrance/Flavor substances -- Analysis by gas chromatography on packed columns -- General method (English PDF)

Foreword

This Standard is identical to ISO 7359:1985 "Essential oil - Analysis by gas

chromatography on packed columns - General method". Compared with ISO

7359:1985, this Standard mainly changes the "essential oil" in the standard

name and the standard to "fragrance/flavor substances".

This Standard is the combination and revision of GB/T 11539-1989 "Isolate and

synthetic aromatics - Analysis by gas chromatography on packed columns -

General method" and GB/T 14455.9-1993 "Essential oils - Analysis by gas

chromatography on packed columns - General method".

This Standard was proposed by China National Light Industry Council.

This Standard shall be under the jurisdiction of National Standardization

Technical Committee on Flavor Fragrance & Cosmetic.

This Standard was drafted by Shanghai Research Institute of Fragrance &

Flavor Industry.

Main drafters of this Standard: Jin Qizhang, Xu Yi, Cao Yi.

The previous editions of the standard replaced by this Standard were released

as follows:

- GB/T 11539-1989;

- GB/T 14455.9-1993.

Fragrance/Flavor substances –

Analysis by gas chromatography on packed columns -

General method

1 Scope

This Standard specifies a general method for the analysis of fragrance/flavor

substances by gas chromatography on packed columns for the purpose of

determining the content of a specific constituent and/or searching for a

characteristic profile.

2 Normative references

The following documents contain provisions which, through reference in this

Standard, constitute provisions of this Standard. For the dated references, their

subsequent amendments (excluding corrections) or revisions do not apply to

this Standard. However, the parties who enter into agreement based on this

Standard are encouraged to investigate whether the latest editions of these

documents are applicable. For undated reference documents, the latest

editions apply to this Standard.

GB/T 11538 Essential oil - Analysis by gas chromatography on capillary

columns - General method (GB/T 11538-2006, ISO 7609:1985, IDT)

GB/T 14454.1 Fragrance/Flavor substances - Preparation of test samples

(GB/T 14454.1-2008, ISO 356:1996, MOD)

3 Principle

Analysis by gas chromatography under specified conditions of a small quantity

of fragrance/flavor substance on a column packed with appropriate material.

If required, identification of the different constituents from their retention indexes.

Quantitative determination of specific constituents by measurement of peak

areas.

9 Determination of retention indexes

If it is necessary to determine the retention indexes, prepare a mixture of the

test portion with normal alkanes including n-pentane. Choose the normal

alkanes in accordance with the range of retention indexes expected. After

stabilization of the temperature of the column, inject a suitable quantity of the

mixture and proceed with the analysis under the conditions specified in 10.1.

Chromatogram "B" is thus obtained.