Water quality -- Determination of selected polybrominated diphenyl ethers in sediment and sewage sludge -- Method using extraction and gas chromatography/mass spectrometry

رقم المستند: NL ISO 22032 : 2010
القطاع: Food Technology
TC: NL TC 147
ICS: 13.060.50
This International Standard specifies a method for the determination of selected polybrominated diphenyl ethers (PBDE) (see Figure 1 and Table 1) in sediment and sludge using gas chromatography/mass spectrometry (GC-MS) in the electron impact (EI) or negative ion chemical ionization (NCI) mode. When using GC-EI-MS, the method is applicable to samples containing 0,05 µg/kg to 25 µg/kg of tetra- to octabromo congeners and 0,3 µg/kg to 100 µg/kg of decabromo diphenyl ether (BDE-209), respectively. Approximately ten times lower concentrations can be quantified when using GC-NCI-MS. The risk of misinterpretation of interfering substances is smaller with EI due to its higher specificity. It is also possible to analyse other brominated diphenyl ethers according to this International Standard, after verifying its applicability in each case. Figure 1 — Chemical formula of polybrominated diphenyl ethers NL ISO 22032:2010 ISO 22032:2006(E) 2 © ISO 2006 – All rights reserved Table 1 — PBDE congeners determined by this method No. Congener Formula Abbreviation a Molar mass g/mol 1 2,2’,4,4’-Tetrabromodiphenyl ether C12H6Br4O BDE-47 485,795 0 2 2,2’,4,4’,5-Pentabromodiphenyl ether C12H5Br5O BDE-99 564,691 1 3 2,2’,4,4’,6-Pentabromodiphenyl ether C12H5Br5O BDE-100 564,691 1 4 2,2’,4,4’,5,6’-Hexabromodiphenyl ether C12H4Br6O BDE-154 643,587 2 5 2,2’,4,4’,5,5’-Hexabromodiphenyl ether C12H4Br6O BDE-153 643,587 2 6 2,2’,3,4,4’,5’,6-Heptabromodiphenyl ether C12H3Br7O BDE-183 722,483 2 7 Decabromodiphenyl ether C12Br10O BDE-209 959,171 4 a Numbering analogous to IUPAC nomenclature for PCB.