GB/T 11538-2006 PDF in English
GB/T 11538-2006 (GB/T11538-2006, GBT 11538-2006, GBT11538-2006)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 11538-2006 | English | 145 |
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Essential oil -- Analysis by gas chromatography on capillary columns -- General method
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| GB/T 11538-1989 | English | 399 |
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Essential oils--Analysis by gas chromatography on capillary columns--General method
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Standards related to (historical): GB/T 11538-2006
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GB/T 11538-2006: PDF in English (GBT 11538-2006) GB/T 11538-2006
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.60
Classification code Y 41
GB/T 11538-2006 / ISO 7609:1985
Replacing GB/T 11538-1989
Essential oil - Analysis by gas chromatography on
capillary columns - General method
(ISO 7609:1985, IDT)
ISSUED ON: MARCH 10, 2006
IMPLEMENTED ON: OCTOBER 01, 2006
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
Introduction ... 4
1 Scope ... 5
2 Normative references ... 5
3 Principle ... 5
4 Reagents and products ... 6
5 Apparatus ... 7
6 Preparation of test sample ... 7
7 Operating conditions ... 8
8 Column performance ... 8
9 Determination of retention indexes ... 12
10 Methods of determination ... 14
11 Expression of results ... 16
12 Test report... 18
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.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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