ISO 6468:1996

Name: ISO 6468:1996 — Water quality — Determination of certain organochlorine insecticides, polychlorinated biphenyls and chlorobenzenes — Gas chromatographic method after liquid-liquid extraction
SKU: ISO 6468:1996
Price: 25 EUR
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Water quality — Determination of certain organochlorine insecticides, polychlorinated biphenyls and chlorobenzenes — Gas chromatographic method after liquid-liquid extraction

Название (английский):

ISO 6468:1996

Water quality — Determination of certain organochlorine insecticides, polychlorinated biphenyls and chlorobenzenes — Gas chromatographic method after liquid-liquid extraction

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 24
Дата публикации:: 5 декабря 1996 г.
Издание:: ISO IS 6468 edition 1 version 1
ICS:: 13.060.50

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Описание (английский):

Describes a method for determining certain organochlorine insecticides, polychlorinated biphenyls (PCBs) and chlorobenzenes (except the mono- and dichlorobenzenes) in drinking water, ground water, surface waters and waste waters. The method is applicable to samples containing up to 0,05 g/l of suspended solids.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 6468:1996 specifies a laboratory method for the determination of certain organochlorine insecticides, polychlorinated biphenyls (PCBs) and chlorobenzenes (excluding mono‑ and dichlorobenzenes) in drinking water, groundwater, surface water and wastewater. The procedure uses liquid–liquid extraction followed by gas chromatography (GC) with an electron‑capture detector (ECD). It is intended for samples containing up to 0.05 g/L suspended solids and is aimed at environmental monitoring where very low concentrations are expected.

Key topics and technical requirements

Scope and limits: Applicable to specified organochlorine compounds; results report specific PCB congeners (not total PCBs). Typical method detection limits reported in the standard range approximately 1–50 ng/L, depending on the compound.

Sample handling: Collect samples in cleaned brown glass bottles, store in the dark at about 4 °C, adjust pH to 5–7 where required; special handling (acidic preservation) for sensitive compounds such as endosulfan.

Extraction: Liquid–liquid extraction performed in the sample container (or with stirring and microseparator), using extraction solvents such as hexane, petroleum ether or heptane. Example extraction volumes: initial 30 mL followed by 20–30 mL extractions.

Clean‑up and concentration: Drying with anhydrous sodium sulfate, optional freeze‑thaw steps, and column clean‑ups using alumina, alumina/silver nitrate, or silica gel as described. Concentration performed using evaporators (e.g., Kuderna‑Danish).

Instrumentation: GC with ECD suitable for capillary columns (25–60 m length, <0.4 mm ID); Annex B provides example GC conditions and chromatograms. Note: ECD contains radionuclides-observe legal and safety requirements.

Reagents and standards: Use high‑purity solvents and certified reference standards; maintain stock, intermediate and working solutions at recommended temperatures and concentrations.

Quality considerations: Special precautions to avoid contamination; blank checks; attention to recovery and reproducibility (interferences higher with organic/suspended matter).

Applications and users

ISO 6468:1996 is used by:

Environmental and public‑health laboratories performing water quality monitoring

Water utilities and regulators testing compliance with pesticide/PCB limits

Contract analytical labs and environmental consultants conducting field studies

Research groups studying organochlorine contamination in aquatic systems

The method supports surveillance programs, contamination investigations and compliance testing where sensitive measurement of organochlorine compounds is required.

Related standards

ISO 5667‑1:1980 and ISO 5667‑2:1991 (water sampling guidance) - referenced for sampling protocols.

Annexes in ISO 6468 include practical GC conditions and clean‑up options to aid implementation.

Keywords: ISO 6468:1996, water quality, organochlorine insecticides, PCBs, chlorobenzenes, liquid–liquid extraction, gas chromatography, electron‑capture detector, environmental monitoring.

ISO 6468:1996

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

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