ISO 7981-1:2005 PDF

Water quality — Determination of polycyclic aromatic hydrocarbons (PAH) — Part 1: Determination of six PAH by high-performance thin-layer chromatography with fluorescence detection after liquid-liquid extraction

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Title (English):

ISO 7981-1:2005

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 27
Publication date:: June 27, 2005
Edition:: ISO IS 7981 edition 1 version 1
ICS:: 13.060.50

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Description (English):

ISO 7981-1:2005 specifies the determination of six selected polycyclic aromatic hydrocarbons (PAH) in drinking water. The 6 PAH are: fluoranthene, benzo[b]fluoranthene, benzo[a]pyrene, benzo[k]fluoranthene, indeno[1,2,3-cd]pyrene, and benzo[ghi]perylene The screening method (method A) described excludes those samples containing less than 20 % of the referenced limit values. The quantitative method (method B) described has a working range of 40 ng/l to 240 ng/l (sum of 6 PAH). Higher concentrations may be determined by using a smaller aliquot of the sample. With some modifications, this method is also applicable for the analysis of ground waters and moderately polluted surface waters.

Technical details

Technical committee: ISO/TC 147/SC 2 - Physical, chemical and biochemical methods
SKU: ISO 7981-1:2005

Abstract

Overview

ISO 7981-1:2005 - "Water quality - Determination of polycyclic aromatic hydrocarbons (PAH) - Part 1" specifies a laboratory method to determine six priority PAH in drinking water. The method uses liquid–liquid extraction followed by separation with high-performance thin‑layer chromatography (HPTLC) and fluorescence detection. It covers both a rapid screening method (Method A) and a quantitative method (Method B) and can be adapted for ground waters and moderately polluted surface waters.

Key topics and technical requirements

Target analytes: fluoranthene, benzo[b]fluoranthene, benzo[a]pyrene, benzo[k]fluoranthene, indeno[1,2,3‑cd]pyrene, benzo[ghi]perylene (sum of 6 PAH).
Sample preparation: analysis of the whole water sample (particulate and dissolved fractions) via liquid–liquid extraction; coloured or contaminated extracts may require silica clean‑up.
Detection: HPTLC separation on precoated silica (or RP‑18) plates with fluorimetric detection (UV lamp, TLC scanner); spectroscopic identification recommended to reduce false positives.
Method performance:
- Screening (Method A): excludes samples containing less than 20% of referenced limit values.
- Quantitative (Method B): working range 40 ng/L to 240 ng/L for the sum of the six PAH; higher concentrations can be measured using smaller sample aliquots.
Reagents and solvents: typical solvents include cyclohexane, hexane, dichloromethane, methanol, acetonitrile; high‑purity nitrogen, precleaned silica, and certified reference standards are recommended.
Sampling and contamination control: use glass or steel containers (avoid plastics except PTFE), protect samples from light, dechlorinate if needed, and monitor blanks and recovery.

Applications

Compliance testing of drinking water for PAH contamination and screening in water treatment and distribution systems.
Environmental monitoring of ground water and moderately polluted surface waters after method adaptations.
Routine laboratory quality control: calibration, blank measurements, and recovery determination as specified in the standard.

Who should use this standard

Water quality laboratories performing regulatory or routine testing for PAH.
Environmental chemists, municipal water authorities, public health laboratories, and contract testing labs.
QA/QC managers and method developers implementing HPTLC‑based PAH analysis.

Related standards

ISO 7981-2 (Part 2): HPLC with fluorescence detection for the same six PAH.
ISO 5667 series: guidance on water sampling procedures referenced for sample collection.

Keywords: ISO 7981-1:2005, PAH determination, HPTLC, fluorescence detection, liquid‑liquid extraction, drinking water analysis, benzo[a]pyrene, environmental monitoring.

Related standards

Mentioned in the description and other ISO standards

Abstract

Overview

Key topics and technical requirements

Target analytes: fluoranthene, benzo[b]fluoranthene, benzo[a]pyrene, benzo[k]fluoranthene, indeno[1,2,3‑cd]pyrene, benzo[ghi]perylene (sum of 6 PAH).
Sample preparation: analysis of the whole water sample (particulate and dissolved fractions) via liquid–liquid extraction; coloured or contaminated extracts may require silica clean‑up.
Detection: HPTLC separation on precoated silica (or RP‑18) plates with fluorimetric detection (UV lamp, TLC scanner); spectroscopic identification recommended to reduce false positives.
Method performance:
- Screening (Method A): excludes samples containing less than 20% of referenced limit values.
- Quantitative (Method B): working range 40 ng/L to 240 ng/L for the sum of the six PAH; higher concentrations can be measured using smaller sample aliquots.
Reagents and solvents: typical solvents include cyclohexane, hexane, dichloromethane, methanol, acetonitrile; high‑purity nitrogen, precleaned silica, and certified reference standards are recommended.
Sampling and contamination control: use glass or steel containers (avoid plastics except PTFE), protect samples from light, dechlorinate if needed, and monitor blanks and recovery.

Applications

Compliance testing of drinking water for PAH contamination and screening in water treatment and distribution systems.
Environmental monitoring of ground water and moderately polluted surface waters after method adaptations.
Routine laboratory quality control: calibration, blank measurements, and recovery determination as specified in the standard.

Who should use this standard

Water quality laboratories performing regulatory or routine testing for PAH.
Environmental chemists, municipal water authorities, public health laboratories, and contract testing labs.
QA/QC managers and method developers implementing HPTLC‑based PAH analysis.

Related standards

ISO 7981-2 (Part 2): HPLC with fluorescence detection for the same six PAH.
ISO 5667 series: guidance on water sampling procedures referenced for sample collection.

Keywords: ISO 7981-1:2005, PAH determination, HPTLC, fluorescence detection, liquid‑liquid extraction, drinking water analysis, benzo[a]pyrene, environmental monitoring.

ISO 7981-1:2005 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications

Who should use this standard

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications

Who should use this standard

Related standards

Related standards

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