ISO 19929:2017
International Standard
Current Edition
·
Approved on
23 March 2017
Plastics — Determination of average molecular mass and mixture ratio of poly(ethylene glycol) and its derivatives by MALDI-TOF-MS
ISO 19929:2017 Files
English
13 Pages
Current Edition
OMR
49.23
ISO 19929:2017 Scope
ISO 19929:2017 specifies a general method for determining the average molecular mass and mixture ratio of poly(ethylene glycol) (PEG) and its derivatives with different end groups by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). It is applicable to PEG and its derivatives with molecular masses from 500 g mol−1 to 20 000 g mol−1. The composition is calculated by means of a calibration curve constructed using standard polymer mixtures, where the peak area ratio is plotted versus the mass ratio. This document can be applied to other polymers with monomeric unit similar to PEG.
Best Sellers
GSO 150-2:2013
Gulf Standard
Expiration dates for food products - Part 2 :
Voluntary expiration dates
OS GSO 150-2:2013
GSO 150-2:2013
Omani Standard
Expiration dates for food products - Part 2 :
Voluntary expiration dates
OS GSO 9:2022
GSO 9:2022
Omani Standard
Labeling of prepackaged food stuffs
GSO 9:2022
Gulf Technical Regulation
Labeling of prepackaged food stuffs
Recently Published
IEC 81346-14:2026
International Standard
Industrial systems, installations and equipment and industrial products — Structuring principles and reference designations — Part 14: Manufacturing and processing systems
ISO 10583:2026
International Standard
Aerospace fluid systems — Test methods for fitting on tube assemblies
ISO 18379-1:2026
International Standard
Railway infrastructure — Ballastless track — Part 1: General requirements
ISO 8810:2026
International Standard
Plastics — Determination of residual peroxide — Gas chromatography method