Standard U.I.C.C. asbestos samples are often contamlnated wlth organic addltlves of polyethylene packing material. Laser microprobe mass analysis when used at low laser lrradlance eondltlons is able to detect specific organlc surface contaminants on indivldual fibers wlth detectlon llmlts of better than 500 pg g-' and wlth a shot-to-shot reproduclblllty of ca. 20%.
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