Determination of Dimethylcyclosiloxane in Enameled Wires by Headspace-GC/MS

A headspace-GC/MS method for the determination of dimethylcyclosiloxane in enameled wires was developed. The dimethylcyclosiloxane such as hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane were studied. The quality and the quantity analysis were done at the same time. Under the optimum separation condition, the four dimethylcyclosiloxane were separated very well. The recovery varies from 90.7% to 94.4%, the RSD of results varies from 7.90% to 9.42%, and the detection limitation is all at the level of 10^－8(ω). The method is simple, rapid, sensitive and accurate.