ISO 12020:1997 PDF
Water quality — Determination of aluminium — Atomic absorption spectrometric methods
Water quality — Determination of aluminium — Atomic absorption spectrometric methods
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 10
- Дата публикации:
- 27 февраля 1997 г.
- Издание:
- ISO IS 12020 edition 1 version 1
- ICS:
- 13.060.50
Describes a flame atomic absorption spectrometric method and a graphite furnace atomic absorption spectrometric method for the determination of aluminium in water. The flame AAS method is applicable to mass concentrations from 5 mg/l to 100 mg/l and the graphite furnace AAS method is applicable to mass concentrations from 10 g/l to 100 g/l in water and waste water.
Abstract
Overview
ISO 12020:1997 specifies two atomic absorption spectrometric (AAS) methods for the determination of aluminium (Al) in water and wastewater. It covers a flame AAS procedure (nitrous oxide/acetylene flame) and a graphite furnace AAS procedure, including required reagents, sampling and sample-preparation steps, calibration, measurement and expression of results. Key analytical parameters include measurement at 309.3 nm, background correction and procedures to avoid contamination.
Key Topics
- Scope and detection ranges
- Flame AAS: applicable for 5 mg/L to 100 mg/L (higher by dilution; lower possible with careful evaporation or by using graphite furnace).
- Graphite furnace AAS: applicable for 10 µg/L to 100 µg/L (with typical injection volumes around 20 µL; working range can be shifted by dilution or sample volume change).
- Reagents & matrix modifiers
- Common reagents: nitric acid, hydrochloric acid, hydrogen peroxide.
- Flame AAS: caesium chloride added to measuring solution.
- Graphite furnace: magnesium nitrate matrix modifier; sulfuric acid injected to compensate fluoride interferences.
- Sampling & sample preparation
- Filtration (0.45 µm) for dissolved aluminium.
- Acidification to pH
Технические детали
- Технический комитет
- ISO/TC 147/SC 2 - Physical, chemical and biochemical methods
- SKU
- ISO 12020:1997
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