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ISO 7359:1985 PDF — Essential oils — Analysis by gas chromatography on packed columns — G… — GOST Standards

//ISO 7359:1985

ISO 7359:1985

Name: ISO 7359:1985 — Essential oils — Analysis by gas chromatography on packed columns — General method
SKU: ISO 7359:1985
Price: 25 EUR
Availability: InStock

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

Название (английский):

ISO 7359:1985

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

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 19 декабря 1985 г.
Издание:: ISO IS 7359 edition 1 version 1
ICS:: 71.100.60

Тип поставки:

Full version25 €Ask AI2 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:1 рабочий день

Цена:25 €

Описание (английский):

The Standard gives detailed information on all recurrent parameters, apparatus, products, methods and formulae for the analysis. In general a small quantity of essential oil is analyzed under specified conditions. If required different constituents are identified from their retention indexes. Quantitative determination of specific constituents is carried out by measurement of peak areas.

Abstract

Overview

Key topics and technical requirements

Scope & principle: Analysis of small samples of essential oils by gas chromatography on packed columns to obtain characteristic profiles and determine specific constituents.
Reagents and gases: Specifies use of high‑purity carrier gases (hydrogen, helium or nitrogen) and auxiliary detector gases; recommends using freshly distilled, analytical‑grade reagents.
Reference and test substances: e.g., linalyl acetate (≥98%) for column inertness, linalol (≥99%) and methane (≥99%) to check column efficiency, and normal alkanes (≥95%) for retention‑index work.
Test mixture: Typical control mixture includes limonene, acetophenone, linalol, linalyl acetate, naphthalene and cinnamic alcohol to evaluate separation and polarity behaviour.
Column specifications: Packed columns of inert material (glass or stainless steel), 2–4 mm ID and preferably 2–4 m length; supports must be inert (e.g., silanized celite).
Column performance checks:
- Chemical inertness: single peak for linalyl acetate under test conditions.
- Efficiency: evaluate number of theoretical plates N from linalol at 130 °C (N ≥ 3 000).
- Resolution/Separation: defined methods to calculate resolution and percent separation (standard criteria such as ≥95% for specified peak pairs).
Retention index determination: Procedures for isothermal and temperature‑programmed runs using normal alkanes; retention indexes used for constituent identification.
Quantification methods: Internal standard and internal normalization approaches; the standard provides formulae for response factors and calculation of constituent content from peak areas and weighed reference materials.
References: Cross‑references ISO 356 (sample preparation) and ISO 7609 (capillary‑column method).

Applications and users

ISO 7359:1985 is used by:

Analytical chemists in fragrance, flavor and aromatherapy industries
Quality control laboratories verifying essential oil composition and purity
Regulatory and standards bodies requiring harmonized test methods
R&D teams characterizing essential‑oil profiles and comparing column packings

Practical applications include routine quality control, identity verification (via retention index), troubleshooting column performance, and comparative analysis of essential‑oil batches.

Related standards

ISO 356 - Essential oils - Preparation of test sample
ISO 7609 - Essential oils - Gas chromatography on capillary columns (general method)

Keywords: ISO 7359:1985, essential oils, gas chromatography, packed columns, retention index, internal standard, column efficiency, chromatographic analysis.

Технические детали

Технический комитет: ISO/TC 54 - Essential oils
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PDF

ISO 7359:1985

Abstract

Overview

Похожие стандарты

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 3563:1976

Information processing — Interchangeable magnetic single-disk cartridge (top loaded) — Track format

ISO 7609:1985

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

ISO 8212:1986

Soaps and detergents — Techniques of sampling during manufacture

ISO 20662:2020

Ships and marine technology — Hopper dredger supervisory and control systems

ISO 3021:2023

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ISO 3826-2:2008

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ISO/IEC 24730-1:2014

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ISO 8668-5:1992

Aircraft — Terminal junction systems — Part 5: Detail specification for type 3 system