ISO 17494:2001 PDF

Name: ISO 17494:2001 — Aromatic extracts, flavouring and perfuming compounds — Determination of ethanol content — Gas chromatographic method on packed and capillary columns
SKU: ISO 17494:2001
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Aromatic extracts, flavouring and perfuming compounds — Determination of ethanol content — Gas chromatographic method on packed and capillary columns

Название (английский):

ISO 17494:2001

Aromatic extracts, flavouring and perfuming compounds — Determination of ethanol content — Gas chromatographic method on packed and capillary columns

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 4 октября 2001 г.
Издание:: ISO IS 17494 edition 1 version 1
ICS:: 71.100.60

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Описание (английский):

flavouring and perfuming compounds by gas chromatography, either on a packed column or a capillary column. The method is applicable to those products having presumed ethanol contents over 0,5 %.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 17494:2001 specifies a gas chromatographic method for the determination of ethanol content in aromatic extracts, flavouring and perfuming compounds. The method covers analysis on either packed columns or capillary columns and is applicable to products with presumed ethanol contents greater than 0.5 %. It defines the analytical principle (GC with an internal standard), required reagents and typical operating conditions, and refers to general GC standards for detailed procedures.

Key topics and requirements

Scope: Ethanol determination in liquid/diluted aromatic products (excludes dry spices); applicable when ethanol > 0.5 %.

Principle: Gas chromatography using the internal standard method (2‑propanol or n‑propanol recommended).

Reagents:

Reference: absolute ethanol (≥99 %), verified by ISO 760 and GC.
Internal standard: 2‑propanol or n‑propanol (≥99 %, ethanol‑free).
Solvent: methanol or other suitable solvent free from interfering impurities.

Apparatus: Standard GC system with flame ionization detector (FID); packed or capillary columns as recommended:

Packed example: 3–4 m length, 2–4 mm i.d., vinyl benzene/styrene stationary phase.
Capillary example: 10–100 m length, 0.2–0.5 mm i.d., dimethylpolysiloxane or PEG phase.

Operating conditions (typical):

Packed columns: oven ~150 °C; injection/detector ~180 °C.
Capillary columns: oven ~50 °C; injection/detector ~230 °C.

Column performance: Chemical inertness and efficiency must be verified per ISO 7359 / ISO 7609.

Calibration and quantification: Determine response factor relative to internal standard as specified in the referenced GC general methods.

Precision: Repeatability-differences >5 % are expected in no more than 5 % of cases; reproducibility-differences >10 % in no more than 5 % of cases.

Special handling: Viscous samples should be diluted in the chosen solvent before analysis.

Applications

ISO 17494 is intended for practical use in:

Quality control laboratories in the flavor & fragrance industry and essential-oil producers.

Contract testing and analytical service labs measuring ethanol content in aromatic extracts.

Regulatory and compliance testing where accurate ethanol quantification in perfuming/flavouring matrices is required. Benefits include standardized, reproducible ethanol analysis for product specification, batch release, adulteration checks, and formulation control.

Related standards

ISO 7359 - Essential oils - GC on packed columns (general method)

ISO 7609 - Essential oils - GC on capillary columns (general method)

ISO 760 - Determination of water - Karl Fischer method

Keywords: ISO 17494, ethanol content, gas chromatography, packed column, capillary column, flavouring compounds, perfuming compounds, internal standard, flame ionization detector, method precision.

ISO 17494:2001 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications

Related standards

Технические детали

SIST ISO 760:1995

Determination of water -- Karl Fischer method (General method)

ISO 7359:1985

Essential oils — Analysis by gas chromatography on packed columns — General method

ISO 7609:1985

Essential oils — Analysis by gas chromatography on capillary columns — General method