... to the WSM, and consequently the EDTA-IM. Hydroxyproline, hydroxy-lysine and phosphoserine were not detected in WSM, WIM,EDTA-SM and EDTA-IM. The comparison of the amino acid composition of the main ... whereas the volume of EDTA-SM injected was half the WSM volume. The low molecular weight peak due to the use of EDTA, often mentioned in the literature [24,33],was not observed in the size-exclusion ... modes of the organic matrix compo-nents) and another, the most intense, at 1593 cm)1, possiblycorresponding to the COO coordinated asymmetric stretch-ing band. The presence of this band resulted...