... PRESS02 10 -7 4 10 -7 6 10 -7 8 10 -7 1 10 -6 2 4 6 8 10 12concentration (M)pHH5EDTMP3 - H6EDTMP2 - ZnHEDTMP5 - HEDTMP7 - ZnH2EDTMP4 - ZnH3EDTMP3 - H4EDTMP4 - H7EDTMP - Fig. ... +4 1-1 -6 3 3-6 1-6 0; fax: +4 1-1 -6 3 3-1 1-2 3.E-mail address: nowack@ito.umnw.ethz.ch (B. Nowack).004 3-1 354/03/$ - see front matter r 2003 Elsevier Science Ltd. All rights reserved.doi:10.1016/S004 3-1 354(03)0007 9-4 1. ... phospho-nates on phosphate elimination. Part 2: 2-phosphono-butane-1,2,4-tricarbonic acid (PBTC), aminotri(methyle-nephosphonic acid) (ATMP) and ethylenediamintetra (- methylenephosphonic acid) (EDTMP)....