ISO 14714:1998 PDF

Name: ISO 14714:1998 — Essential oils and aromatic extracts — Determination of residual benzene content
SKU: ISO 14714:1998
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Essential oils and aromatic extracts — Determination of residual benzene content

Название (английский):

ISO 14714:1998

Essential oils and aromatic extracts — Determination of residual benzene content

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 5
Дата публикации:: 23 июля 1998 г.
Издание:: ISO IS 14714 edition 1 version 1
ICS:: 71.100.60

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Описание (английский):

La présente Norme internationale décrit une méthode de détermination des traces résiduelles de benzène dans les huiles essentielles et extraits aromatiques, par chromatographie en phase gazeuse de l'espace de tête statique. Elle s'applique à des teneurs résiduelles de l'ordre de 10 x 10-6 (10 ppm) dans le produit analysé.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 14714:1998 specifies a laboratory method for the determination of residual benzene in essential oils and aromatic extracts using static headspace gas chromatography (SHS‑GC). The method is intended for low-level benzene residues (around 10 ppm) in the analysed product and covers the technique, calibration, operating conditions and accuracy performance characteristics.

Key topics and requirements

Analytical principle: Static headspace sampling followed by gas chromatography on a capillary column with either flame ionization detection (FID) or mass spectrometric (MS) detection.

Reference materials: Benzene reference substance (minimum purity 99%) and diethyl phthalate as solvent (must be verified free of benzene).

Column and detector:

Capillary column: 30–60 m length, internal diameter 0.20–0.50 mm, methyl silicone stationary phase recommended.
Detector temperature (FID): 200–250 °C. If MS is used, quantification at ion m/z 78 is advised.

Headspace/sample conditions:

Sample thermostatted at 70–75 °C for at least 30 minutes.
Headspace vial filled to between one‑tenth and one‑half of its volume.

Chromatographic program:

Injector 150 °C.
Oven held 40–60 °C for 15 minutes, followed by rapid temperature programming to elute less volatile components.

Quantification:

External calibration by gravimetric preparation of a 1% benzene stock in diethyl phthalate and dilutions to produce standards of 1, 5, 10 and 25 ppm.
Calibration curve validation required before each analysis by an independently weighed validation solution.

Accuracy/performance:

Repeatability: in not more than 5% of cases, two results in the same lab will differ by more than 6.5%.
Reproducibility: in not more than 5% of cases, results between different labs will differ by more than 13.5%.

Headspace injection: can be performed with a manual gas syringe (leaktight) or an automatic injector.

Applications

Routine quality control and batch testing of essential oils, perfume ingredients and aromatic extracts to detect residual benzene contamination.

Regulatory and safety testing to support product release, risk assessment and compliance with allowable impurity limits.

Troubleshooting manufacturing and solvent‑handling processes where benzene contamination is a concern.

Related standards

ISO 356 - Essential oils: Preparation of test samples.

ISO 7609 - Essential oils: Analysis by gas chromatography on capillary columns (general GC guidance).

Keywords: ISO 14714:1998, essential oils, residual benzene content, static headspace gas chromatography, SHS‑GC, benzene detection, capillary GC, fragrance QC.

ISO 14714:1998 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications

Who should use this standard

Related standards

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