Bestimmung von N-nitrosaminen in kautschuken und vulkanisaten - Einfluß von inhibitoren

authored by

A. Blume, U. Giese, R. H. Schuster

Abstract

N-nitrosamines (NA) are detected in rubber and vulcanizates by methanol extraction and subsequent detection employing GC-TEA. The use of ascorbic acid as an inhibitor of nitrosation during extraction has a negative influence on the quality of the analysis. Interferences in the chromatogram hinder the classification and determination of N-nitroso dimethyl-amine (NDMA), N-nitroso diethylamine (NDEA) and N-nitroso dipropylamine (NDPA). This work elucidates the mechanism of the ascorbic acid disturbance. α-hydroxy acids decay at the temperature of the Chromatographic columns by generating CO which will give a signal like NO at the TEA-detector. The use of hydroquinone instead of ascorbic acid avoids these interferences. In this way the determination of NDMA, NDEA and NDPA is significantly improved.

External Organisation(s)

German Institute of Rubber Technology (DIK e.V.)

Type

Article

Journal

KGK-Kautschuk und Gummi Kunststoffe

Volume

49

Pages

532-537

No. of pages

6

ISSN

0948-3276

Publication date

07.1996

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Mechanical Engineering, Polymers and Plastics, Industrial and Manufacturing Engineering, Materials Chemistry