SIST ISO 11349:2011 PDF

Name: SIST ISO 11349:2011 — Water quality - Determination of low-volatility lipophilic substances - Gravimetric method
SKU: SIST ISO 11349:2011
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Water quality - Determination of low-volatility lipophilic substances - Gravimetric method

Название (английский):

SIST ISO 11349:2011

Water quality - Determination of low-volatility lipophilic substances - Gravimetric method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 16 мая 2011 г.
ICS:: 13.060.50
Технический комитет:: KAV - Water quality

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Описание (английский):

ISO 11349:2010 defines a method for the determination of lipophilic substances of low volatility in water using gravimetry. The method is applicable to all kinds of water and allows the determination of low‑volatility lipophilic substances which are suspended, emulsified, or dissolved, in concentrations of about 10 mg/l to 500 mg/l. Above this value, the test portion is diluted appropriately. The method is not applicable to water with a separate oil layer.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 11349:2010 - Water quality - Determination of low‑volatility lipophilic substances - Gravimetric method describes a standardized laboratory procedure to quantify low‑volatility lipophilic substances in water by gravimetry. The method covers dissolved, emulsified or suspended lipophilic materials (e.g., animal/vegetable oils, mineral oils, waxes, greases and some non‑ionic surfactants) in the concentration range of about 10 mg/L to 500 mg/L. It is applicable to all kinds of water but not suitable for samples with a separate oil layer.

Key topics and requirements

Principle: liquid–liquid extraction with a non‑polar hydrocarbon, evaporation/concentration of the extract and gravimetric determination after drying.

Scope limits: intended for low‑volatility substances (boiling point > 250 °C); concentration range ~10–500 mg/L (dilute samples above this range).

Reagents: non‑polar hydrocarbons with boiling range 36–69 °C (e.g., petroleum ether 40–60 °C, n‑hexane), anhydrous Na2SO4, MgSO4·7H2O, mineral acid (e.g., H2SO4, 2 mol/L), acetone and high‑purity water (ISO 3696 grade).

Sample handling: acidify to pH ≤2 for preservation if not analyzed immediately; store at ≈4 °C and analyze within 7 days.

Procedure highlights:

Homogenize sample, extract (typically two 50 mL solvent portions), combine organic phases, dry over sodium sulfate, filter through a hydrophobic filter.
Concentrate extract (e.g., rotary evaporator), strip solvent, dry at 80 ± 3 °C for 15 min, cool in desiccator and weigh.

Quality control:

Blank determinations carried out routinely - blank must not exceed 3 mg/L.
Recovery check using a vegetable oil spike (e.g., olive oil) - required recovery 90–105%.

Reporting: mass concentration in mg/L to two significant figures; test report must reference ISO 11349:2010 and include sampling, pretreatment and any deviations.

Applications and users

Environmental and regulatory monitoring laboratories assessing oil and grease, fats and other lipophilic contaminants in surface water, industrial and municipal effluents.

Wastewater treatment facilities and industrial process control labs for compliance and performance monitoring.

Consultants and accredited testing bodies requiring a traceable, reproducible gravimetric method for low‑volatility lipophilic substances.

Practical benefits include a simple, well‑documented gravimetric workflow, suitability for a wide range of water matrices, and clear QC criteria for routine monitoring.

Related standards

ISO 3696 - Water for analytical laboratory use (quality of water used in the method)

ISO 4788 - Laboratory glassware (measuring cylinders)

ISO 5725‑2 - Precision (repeatability and reproducibility) of measurement methods

Keywords: ISO 11349:2010, water quality, gravimetric method, low‑volatility lipophilic substances, oil and grease, extraction, petroleum ether, n‑hexane, laboratory method.

SIST ISO 11349:2011 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 11349:2010

Water quality — Determination of low-volatility lipophilic substances — Gravimetric method

SIST EN ISO 3696:1998

Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)

SIST EN ISO 4788:2005

Laboratory glassware - Graduated measuring cylinders (ISO 4788:2005)

SIST ISO 5725-2:2020

Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determina…