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<p>ISO/TS 16780:2015 specifies a method for the determination of polychlorinated naphthalenes (PCNs), where "poly" means "mono" to "octa", in waters and waste waters [containing less than 2 g/l solid particulate material (SPM)] using high resolution gas chromatography?high resolution mass spectrometry (HRGC?HRMS).</p>
<p>NOTE 1 The congeners analysed by this method are listed in Table 1.</p>
<p>The working range of the method is 20 pg/l to 8 ng/l. The method is optimized for PCNs, but can be modified to include other coplanar compounds such as polychlorinated dioxins and furans (PCDDs/PCDFs) and dioxin-like tetra- to heptachlorinated biphenyls (dlPCBs). This method can be used to determine PCNs in other matrices (e.g. biota, sediments, air); however, additional clean-up steps and techniques can be necessary for samples with high organic loadings. Low resolution mass spectrometry (LRMS) and mass spectrometry?mass spectrometry (MS?MS) can be used.</p>
<p>NOTE 2 LRMS and MS?MS conditions are summarized in Annex A.</p>
<p>Both LRMS and MS?MS can be less selective than HRMS and there is a possibility of bias due to interfering compounds if these techniques are used.</p>
<p>The detection limits and quantification levels in this method are dependent on the level of interferences as well as instrumental limitations.</p>
<p>NOTE 3 The minimum levels (ML) in Table 4 are the levels at which the PCNs can typically be determined with no interferences present.</p>
<p>This method is performance based. The analyst is permitted to modify the method, e.g. to overcome interferences, provided that all performance criteria in this method are met.</p>
<p>NOTE 4 The requirements for establishing method validation or equivalency are given in Clause 9.</p>
Reģistrācijas numurs (WIID)
68420
Darbības sfēra
<p>ISO/TS 16780:2015 specifies a method for the determination of polychlorinated naphthalenes (PCNs), where "poly" means "mono" to "octa", in waters and waste waters [containing less than 2 g/l solid particulate material (SPM)] using high resolution gas chromatography?high resolution mass spectrometry (HRGC?HRMS).</p>
<p>NOTE 1 The congeners analysed by this method are listed in Table 1.</p>
<p>The working range of the method is 20 pg/l to 8 ng/l. The method is optimized for PCNs, but can be modified to include other coplanar compounds such as polychlorinated dioxins and furans (PCDDs/PCDFs) and dioxin-like tetra- to heptachlorinated biphenyls (dlPCBs). This method can be used to determine PCNs in other matrices (e.g. biota, sediments, air); however, additional clean-up steps and techniques can be necessary for samples with high organic loadings. Low resolution mass spectrometry (LRMS) and mass spectrometry?mass spectrometry (MS?MS) can be used.</p>
<p>NOTE 2 LRMS and MS?MS conditions are summarized in Annex A.</p>
<p>Both LRMS and MS?MS can be less selective than HRMS and there is a possibility of bias due to interfering compounds if these techniques are used.</p>
<p>The detection limits and quantification levels in this method are dependent on the level of interferences as well as instrumental limitations.</p>
<p>NOTE 3 The minimum levels (ML) in Table 4 are the levels at which the PCNs can typically be determined with no interferences present.</p>
<p>This method is performance based. The analyst is permitted to modify the method, e.g. to overcome interferences, provided that all performance criteria in this method are met.</p>
<p>NOTE 4 The requirements for establishing method validation or equivalency are given in Clause 9.</p>
