GB/T 11538-2006Essential oil -- Analysis by gas chromatography on capillary columns -- General method (English PDF)

Foreword

This Standard is identical to the International Standard ISO 7609:1985

"Essential oil - Analysis by gas chromatography on capillary columns - General

method".

For ease of use, the following editorial changes have been made to this

Standard:

a) The word "this International Standard" is changed to "this Standard";

b) "ISO 356" is changed to "GB/T 14454.-1993", "ISO 7359" is changed to

"GB/T 11539-1989";

c) DELETE the foreword of ISO 7609:1985.

This Standard replaces GB/T 11538-1989 "Essential oils - Analysis by gas

chromatography on capillary columns - General method".

This Standard was proposed by China Light Industry Council.

This Standard shall be under the jurisdiction of the National Technical

Committee on Fragrance, Flavor and Cosmetic of Standardization

Administration of China.

This Standard was drafted by Shanghai Research Institute of Fragrance &

Flavor Industry.

Main drafters of this Standard: Zhang Xinjun, Xu Yi, Jin Qizhang, Kang Wei.

The previous released version replaced by this Standard is as follows: GB/T

11538-1989.

Introduction

Since the description of methods of analysis by gas chromatography is very

long, it is considered useful to establish general methods on the one hand,

giving detailed information on all the recurrent parameters, apparatus, products,

methods, formulae, etc., and on the other hand standards with short details on

the determination of specific constituents in the essential oils, giving only those

operating conditions specific to the pertinent determination.

These short-version standards will either refer to the present standard for gas

chromatographic analyses on capillary columns or to GB/T 11539-1989 for

"Isolate and synthetic aromatics - Analysis by gas chromatography on packed

columns - General method".

Essential oils - Analysis by gas chromatography on

capillary columns - General method

1 Scope

This Standard specifies a general method for the analysis of essential oils by

gas chromatography on capillary 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 the provisions which, through reference in this

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

subsequent amendments (excluding corrigendum) 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 versions of these

documents are applicable. For undated reference documents, the latest

versions apply to this Standard.

GB 11539-1989 Isolate and synthetic aromatics - Analysis by gas

chromatography on packed columns - General method (neq lSO 7359:1985)

GB/T 14454.1-1993 Aromatics. Preparation of test sample (neq ISO

356:1977)

3 Principle

Analysis by gas chromatography under specified conditions of a small quantity1)

of essential oil on a column of small diameter but great length, the inside wall

of the column having been previously coated either directly with a specified

stationary phase or with an impregnated support (column coated internally with

impregnated support).

If required, identification of the different constituents from their retention

indexes.

Quantitative determination of specific constituents by measurement of peak

1) Take care to ensure that the injected test portion does not saturate the column.

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