ISO 9487:1991 PDF

Name: ISO 9487:1991 — Workplace air — Determination of vaporous aromatic hydrocarbons — Charcoal tube/solvent desorption/gas chromatographic method
SKU: ISO 9487:1991
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Workplace air — Determination of vaporous aromatic hydrocarbons — Charcoal tube/solvent desorption/gas chromatographic method

Название (английский):

ISO 9487:1991

Workplace air — Determination of vaporous aromatic hydrocarbons — Charcoal tube/solvent desorption/gas chromatographic method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 15 августа 1991 г.
Издание:: ISO IS 9487 edition 1 version 1
ICS:: 13.040.30

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Описание (английский):

Specifies a method for the measurement of the concentrations of airborne vapours in the range from approx. 1 mg/m^3 to 1 000 mg/m^3 when sampling 10 litres of air. Annexes A, B and C form an integral part of this standard. Annex D is for information only.

Abstract

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Стандарты, упомянутые в описании

Overview

ISO 9487:1991 - Workplace air: Determination of vaporous aromatic hydrocarbons specifies a validated laboratory method for measuring airborne vaporous aromatic hydrocarbons using a charcoal tube / solvent desorption / gas chromatographic procedure. The method is applicable for time‑weighted‑average concentrations roughly from 1 mg/m³ to 1 000 mg/m³ (when sampling 10 litres of air). Annexes A, B and C are integral; Annex D is informative.

Key phrases: ISO 9487:1991, workplace air, vaporous aromatic hydrocarbons, charcoal tube, solvent desorption, gas chromatographic method.

Key topics and technical requirements

Target compounds: benzene, toluene, ethylbenzene, m‑/o‑/p‑xylene, styrene, cumene, trimethylbenzenes, and several other substituted monocyclic aromatics listed in the standard.

Sampling medium: glass charcoal tubes (70 mm × 6 mm o.d., 4 mm i.d.) packed with activated coconut‑shell charcoal (particle size 0.4–0.8 mm). Typical packing: 100 mg front (adsorbing) + 50 mg backup.

Desorption solvent: carbon disulfide (CS2) (chromatographic quality) is specified for desorbing collected vapours; safety precautions are required due to toxicity and flammability.

Analysis: gas chromatograph with flame ionization detector (GC‑FID) or equivalent detector. Calibration via gravimetrically prepared standard solutions; desorption efficiency must be checked (annex B).

Breakthrough and sampling limits: the useful upper range is limited by the adsorptive capacity (breakthrough volume) of the front charcoal section. Breakthrough testing and selection of sample volume/flow rate are essential (see Annex A and Tables provided).

Equipment & QA: personal sampling pumps with stable low flow rates, soap‑bubble or equivalent flowmeter calibration, tube pre‑treatment (e.g., charcoal heated in inert atmosphere), sample blanks, storage (freeze or dry ice if analysis delayed >8 h).

Validation notes: method validated for a selection of typical aromatic hydrocarbons. Interferences with co‑eluting organics must be managed by column selection and chromatographic conditions (guidance in Annex C).

Applications and users

Who uses it: occupational hygienists, industrial safety officers, environmental testing laboratories, regulatory compliance personnel, and researchers assessing workplace exposure to aromatic solvents.

Practical uses:

Personal and fixed‑location sampling for 8‑hour time‑weighted‑average exposure assessments.
Compliance monitoring against occupational exposure limits for benzene, toluene, xylene, styrene, etc.
Baseline surveys and exposure trend analysis in manufacturing, painting, petrochemical and solvent‑using operations.

ISO 9487:1991 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

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