Water quality — Determination of individual isomers of nonylphenol — Method using solid phase extraction (SPE) and gas chromatography/mass spectrometry (GC/MS)
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This International Standard specifies a method for the determination of selected individual isomers of nonylphenol in non-filtered samples of drinking water, waste water, ground water and surface water. The method is applicable in concentrations between 0,001 µg/l and 0,1 µg/l for individual isomers and from 0,01 µg/l to 0,2 µg/l for the sum of 4-nonylphenol (mixture of isomers). Depending on the matrix, the method is also applicable to waste water in concentrations between 0,1 µg/l and 50 µg/l.
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Sampling and sample pretreatment
7 Procedures
7.1 Solid phase extraction
7.2 Clean up
7.3 GC/MS operating conditions
7.4 Blank determination
7.5 Identification
8 Calibration
8.1 General requirements
8.2 Calibration over the total procedure with internal standard
9 Calculation
9.1 Calculation of contribution of individual isomers of nonylphenol in technical mixture
9.2 Calculation of relative response factor of individual isomers of nonylphenol
9.3 Quantification of individual isomers of nonylphenol using relative response factor
9.4 Calculation of internal standard recovery
10 Expression of results
11 Test report
Annex A Sorbent example (informative)
Annex B Suitable capillary column (informative)
Annex C Examples of chromatograms (informative)
Annex D Example of FID chromatogram and composition ratio (%) of isomers in 4-nonylphenol standard (informative)
Annex E Method performance data (informative)
Annex F Description of the matrices of the samples used for the interlaboratory trial (informative)
ISO 3696 Water for analytical laboratory use — Specification and test methods
ISO 5667-1 Water quality — Sampling — Part 1: Guidance on the design of sampling programmes and sampling techniques
ISO 8466-1 Water quality — Calibration and evaluation of analytical methods and estimation of performance characteristics — Part 1: Statistical evaluation of the linear calibration function
ISO 3696 Water for analytical laboratory use — Specification and test methods
ISO 5667-1 Water quality — Sampling — Part 1: Guidance on the design of sampling programmes and sampling techniques
ISO 8466-1 Water quality — Calibration and evaluation of analytical methods and estimation of performance characteristics — Part 1: Statistical evaluation of the linear calibration function