Pocket interiors sampling

It is difficult to produce valid persistence data for clothing other than to say that it is our most fruitful sampling area (pocket interiors in particular). As stated previously, persistence on clothing depends on the nature of the material and the degree of physical disturbance the garment suffers. FDR will remain indefinitely on clothing if the clothing is undisturbed. 

Some authors believe that EF material is released at the external surface of zeolites. The use of hindered nitriles, however, demonstrated that the EF material produced by thermal treatment in H-MOR is in the interior of the side pockets [150]. Similarly in a sample of H-MFl, EF material was found to be located in the interior of the channels [150]. 

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