BS ISO 24293:2009

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 (informative) - Sorbent example
Annex B (informative) - Suitable capillary column
Annex C (informative) - Examples of chromatograms
Annex D (informative) - Example of FID chromatogram and
                        composition ratio (%) of isomers
                        in 4-nonylphenol standard
Annex E (informative) - Method performance data
Annex F (informative) - Description of the matrices of
                        the samples used for the
                        interlaboratory trial
Bibliography

Describes 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.

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 0,001µg/l and 0,1µg/l for individual isomers and from 0,01µg/l to 0,2µg/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 0,1µg/l and 50µg/l.