🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS ISO 23157:2021

BS ISO 23157:2021

$102.76

Determination of the silanol group content on the surface of fumed silica. Reaction gas chromatographic method

Published By Publication Date Number of Pages
BSI 2021 20
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

This document specifies a method for the determination of the silanol group content on the surface of fumed silica by reaction gas chromatographic method.

PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
10 5 Reagents
5.1 General
5.2 Toluene
5.3 Grignard reagent
5.4 Reaction solution
5.5 Carrier gas and diluent gas
5.6 Auxiliary gases
5.7 Calibration substance
11 6 Apparatus
6.1 Gas chromatograph
6.2 Headspace system
6.3 Oven
6.4 Capillary column
6.5 Sample vials
12 6.6 Analytical balance
6.7 Gas collecting bag
6.8 Syringe
7 Sample pre-treatment and reaction
7.1 Sample pre-treatment
7.1.1 Determination of matter volatile at 105 °C in fumed silica
7.1.2 Preparation of the test sample
7.2 Blank test
13 7.3 Reaction
7.4 Analysis
7.4.1 Headspace system conditions
7.4.2 Gas chromatographic conditions
7.4.3 Identification
7.4.4 Calibration
14 7.4.5 Measurement
8 Calculation
8.1 Calculation of the methane quantity produced in the vials
8.2 Calculation of the silanol group content
8.2.1 Calculation of fumed silica volatile at 105 °C
8.2.2 Calculation of the silanol group content on the surface of fumed silica
15 9 Expression of results
10 Precision
10.1 General
10.2 Repeatability limit, r
10.3 Reproducibility limit, R
11 Test report
17 Annex A (informative) Representative chromatogram of methane
18 Annex B (informative) Information about precision
19 Bibliography

Related products

BS ISO 23157:2021
$102.76