Rubber accelerators are used to speed up the cross-linking process between sulfur and rubber molecules. Common accelerators include thiurams, dithiocarbamates, and sulfenamides. Each type of rubber accelerator has specific performance characteristics, and its purity affects the rate of vulcanization, as well as the physical properties of the final rubber product. Our highly experienced chemists perform High Performance Liquid Chromatography to separate, identify, and quantify individual components in a mixture. In ASTM D5297, HPLC is used to determine the purity of rubber accelerators by isolating the target chemical from any impurities or related compounds. HPLC is accurate and cost-efficient for quickly analyzing complex mixtures and determining purity. Rubber accelerator purity is expressed as a percentage, comparing the chromatographic peak of the target accelerator to those of any impurities or degradation products present in the sample.