http://www.scientistsolutions.com/t5864-
****madzu+autosampler+question.html
"We have been producing blocked columns at an alarming rate. On
investigation I noticed a pile of "chips' resembling graphite near the
needle guide and on the needle spring assembly. Pursuing this further
we noticed the "chip" on the plate seals and on the needle seal. We
now belive these chips may be getting into the system. Has anyone else
noted these 'chips'?"
