| Nombre | apoyo | Revisión | Disponibilidad | Fecha de emisión | Precio | ||
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PDF |
Inglés |
Vigente |
24/6/2021 |
89,00 € |
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Detalles
This document specifies a method for the determination of certain cyclic volatile methylsiloxanes (cVMS) in environmental water samples with low density polyethylene (LDPE) as a preservative and subsequent liquid-liquid extraction with hexane containing 13 C-labeled cVMS as internal standards. The extract is then analysed by gas chromatography-mass spectrometry (GC-MS). NOTE Using the 13 C-labeled, chemically identical substances as internal standards with the same properties as the corresponding analytes, minimizes possible substance-specific discrimination in calibrations. Since these substances are least soluble in water, they are introduced via the extraction solvent hexane into the system. This document is applicable to the measurement of the following cVMS in rivers, streams, and waste water (influent and effluent): Table 1 — Analytes determined by this method Analyte Formula Abbreviation CASa -RN Octamethylcyclotetrasiloxane C8 H24 O4 Si4 D4 556-67-2 Decamethylcyclopentasiloxane C10 H30 O5 Si5 D5 541-02-6 Dodecamethylcyclohexasiloxane C12 H36 O6 Si6 D6 540-97-6 a CAS-RN Chemical Abstracts Services Registration Number This method can be used to determine cVMS from 0,1 µg/l to 250 µg/l. In well controlled laboratory environments, where contamination is minimized, the lower end of the application range can be diminished by a factor of up to 10.
Directives : Not yet available in DB
Información adicional
| Autor | Bureau de Normalisation Belge (NBN) |
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| Publicado por | NBN |
| Tipo de Documento | Norma |
| ICS | 13.060.50 : Determinación de sustancias químicas en el agua
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| histórico | No |
| Palabra clave | ISO 20596-2, ISO 20596-2:2021 |
| Formulario de pedido |
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