ISO 23157:2021 PDF
Determination of the silanol group content on the surface of fumed silica — Reaction gas chromatographic method
Determination of the silanol group content on the surface of fumed silica — Reaction gas chromatographic method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 11
- Дата публикации:
- 13 июля 2021 г.
- Издание:
- ISO IS 23157 edition 1 version 1
- ICS:
- 87.060.10
This document specifies a method for the determination of the silanol group content on the surface of fumed silica by reaction gas chromatographic method.
Abstract
Overview
ISO 23157:2021 specifies a laboratory method for the using a . The standard details reagents, apparatus, sample pre‑treatment, reaction with a Grignard reagent, headspace sampling and gas chromatography with flame ionization detection (GC‑FID) to quantify methane produced from surface hydroxyl (silanol) groups. This method is optimized for sensitivity and reproducibility in measuring surface silanol concentration on pyrogenic (fumed) silica.
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