Originally Posted By: ACE120
I used small company in MI that I had the opportunity to tour in College. petroleum technologies they are $17 including shipping both ways and sample bottle
elements(in PPM?)-
Cu-4, Fe-70, Cr-4, Al-9, Pb-1, Sn-0, Si-21, Ca-1445, Mg-24, Zn-767, P-604, Mo-22, B-11...