ISO 11732:2005 specifies methods suitable for the determination of ammonium nitrogen in various types of waters (such as ground, drinking, surface, and waste waters) in mass concentrations ranging from 0,1 mg/l to 10 mg/l (in the undiluted sample), applying either FIA or CFA. In particular cases, the range of application may be adapted by varying the operating conditions.
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Determination of ammonium nitrogen by flow injection analysis (FIA) and spectrometric detection
3.1 Principle
3.2 Interferences
3.3 Reagents
3.4 Apparatus
3.5 Sampling and sample pretreatment
3.6 Procedure
4 Determination of ammonium nitrogen by continuous flow analysis (CFA) and spectrometric detection
4.1 Principle
4.2 Interferences
4.3 Reagents
4.4 Apparatus
4.5 Procedure
5 Calculation
5.1 Evaluation
5.2 Expression of results
6 Precision
7 Test report
Annex A Examples of flow analysis systems (informative)
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ISO 5667-1:1980 Water quality -- Sampling -- Part 1: Guidance on the design of sampling programmes
ISO 5667-2:1991 Water quality -- Sampling -- Part 2: Guidance on sampling techniques
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ISO 5667-1:1980 Water quality -- Sampling -- Part 1: Guidance on the design of sampling programmes
ISO 5667-2:1991 Water quality -- Sampling -- Part 2: Guidance on sampling techniques
ISO 5667-3:2003 Water quality -- Sampling -- Part 3: Guidance on the preservation and handling of water samples
ISO 8466-1:1990 Water quality -- Calibration and evaluation of analytical methods and estimation of performance characteristics -- Part 1: Statistical evaluation of the linear calibration function