Water quality. Determination of selected plant treatment agents and biocide products. Method using solid-phase microextraction (SPME) followed by gas chromatography-mass spectrometry (GC-MS) (ISO 27108:2010)
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ISO 27108:2010 specifies a method for the determination of the dissolved amount of selected plant treatment agents and biocide products in drinking water, ground water and surface water by solid-phase microextraction (SPME) followed by gas chromatography-mass spectrometry (GC-MS). The limit of determination depends on the matrix, on the specific compound to be analysed and on the sensitivity of the mass spectrometer. For most plant treatment agents and biocides to which ISO 27108:2010 applies, it is at least 0,05 µg/l. Validation data related to a concentration range between 0,05 µg/l and 0,3 µg/l have been demonstrated in an interlaboratory trial. This method may be applicable to other compounds not explicitly covered by ISO 27108:2010 or to other types of water. However, it is necessary to verify the applicability of this method for these special cases.
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Interferences
4.1 Interferences during sampling
4.2 Interferences during extraction procedure
4.3 Interferences during gas chromatography and mass spectrometry procedure
5 Reagents
6 Apparatus
7 Sampling and sample pretreatment
8 Procedure
8.1 Sample preparation and extraction
8.2 Gas chromatograph
8.3 Identification of individual compounds by means of GC-MS
8.4 Blank value measurements
9 Calibration
9.1 General requirements
9.2 Calibration with internal standard covering the total procedure
10 Calculation
11 Expression of results
12 Test report
Annex A Examples of gas chromatograms for compounds listed in Table 1 (informative)
Annex B Mass spectra of compounds of Table 1 (full-scan, EI, 70 eV) (informative)
Annex C Precision data (informative)
Annex D General information about SPME (informative)
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ISO 5667-1:2006 Water quality -- Sampling -- Part 1: Guidance on the design of sampling programmes and sampling techniques
ISO 5667-3:2012 Water quality -- Sampling -- Part 3: Preservation and handling of water samples
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ISO 5667-1:2006 Water quality -- Sampling -- Part 1: Guidance on the design of sampling programmes and sampling techniques
ISO 5667-3:2012 Water quality -- Sampling -- Part 3: Preservation and handling of water samples