Solid‐phase extraction of primary aromatic amines from aqueous samples; comparison with liquid‐liquid extraction techniques

Abstract

The extraction of the following primary aromatic amines from aqueous samples was studied: 1,4‐phenylenediamine, 2,4‐diaminotoluene, benzidine, 4,4'‐methylenebis (2‐chloroaniline), 3,3'‐dimethylbenzidine, and 3,3'‐dichlorobeïizidine. Five different adsorbents were evaluated for solid‐phase extraction (SPE) in the reversed‐phase mode. An SPE method utilizing a styrene/divinylbenzene copolymer disk was developed, and compared to separatory funnel and continuous liquid‐liquid extraction techniques. Significantly better recoveries were obtained on fortified tap, stream, and lake water samples using SPE.

Key words:

• Solid‐phase extraction
• aromatic amines

Notes

Present address: Lancaster Laboratories Inc., 2425 New Holland Pike, Lancaster, PA 17601

Present address: E.I. du Pont de Nemours & Co., Inc., Agricultural Products, Experimental Station, Wilmington, Delaware 19898