Method for solid-phase microextraction and analysis, and a collector for this method

Abstract

The invention relates to a method for solid-phase microextraction and analysis of substances in a carrier fluid, in which a collector is brought into contact with the stirred fluid containing the substances for a sufficient time and is then subjected to a solid-phase extraction directed at at least one substance adhering to the collector, and desorbed substances are transported for analysis by means of a carrier gas, in which the carrier fluid containing the substances is stirred in a receptacle of a magnetic stirrer by means of a coated magnetic stirring element as the collector, and/or the carrier fluid is made to move intimately relative to the collector by means of ultrasound, and then the stirring element is placed in a solid-phase extraction device.

1 - 51 . (canceled)  
     
     
         52 . A collector for the solid-phase microextraction and analysis of substances to be examined, comprising a rod-like element sheathed in a flexible tube of material selected from the group consisting of a sorbent, an adsorbent and a combined sorbent and adsorbent, and capable of being picked up by a discharging device selected from the group consisting of a gripping device, suction device, and a magnet, and removed.  
     
     
         53 . The collector of  claim 52 , adapted to be insertable in a thermal desorption apparatus of a gas chromatograph.  
     
     
         54 . The collector of  claim 52  wherein said material is a member selected from the group consisting of polyethylene glycol, silicone, polyimide, octadecyltrichlorosilane, polymethylvinylchlorosilane, liquid-crystal polyacrylates, grafted self-organized monomolecular layers and inorganic coating materials.  
     
     
         55 . The collector of  claim 52  wherein said rod-like element is a section of wire.