Vacuum distillation is useful in the case of fragile samples such as burned documents. Howev- er, the time of distillation and use of hazardous solvents outweigh the benefits [2]. In addition the pre-concentration of analytes on activated charcoal strips (ACS) [18,19] and Tenax GC [20,21] have been the most commonly used sorbents for evaluation, but may require the use of hazardous solvents and/or additional thermal desorption equipment.