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Rapid Analysis of p-Phenylenediamine Antioxidants in Rubber

Introduction

p-Phenylenediamine (PPD) and derivative compounds are commonly used as antioxidants and antiozonants in black rubber. These compounds can cause sensitization leading to contact dermatitis in susceptible individuals. Detection of additives in polymers such as rubber can be important for clinical, forensic, and manufacturing applications. Here we show that DART can be used to identify the presence of these compounds within seconds without requiring any solvents or sample preparation.

Experimental

Analysis was carried out by using the AccuTOFDART. A piece of rubber from a mountain bike tire was placed in front of the DART ion source, which was operated with helium in positive-ion mode and a gas heater temperature of 250 degrees C. Signals appeared within seconds after placing the rubber in front of the DART source.

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