Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.
Volume 11
Issue 2
Agricultural Engineering
Ciesielski W. , Tomasik P. 2008. METAL COMPLEXES OF XANTHAN GUM, EJPAU 11(2), #25.
Available Online: http://www.ejpau.media.pl/volume11/issue2/abs-25.html


Wojciech Ciesielski1, Piotr Tomasik2
1 Institute of Chemistry, Environmental Protection and Biotechnology, Jan Długosz Academy, Częstochowa, Poland
2 Nantes Nanotechnological Systems, Bolesławiec, Poland



Interactions of selected paramagnetic transition metal salts [Ni(II), Co(II), Cu(II), Fe(III), Mn(II)] with xanthan gum are described. The conductivity, DSC/TG/DTG measurements, and EPR measurements produced evidence for the formation of Werner-type complexes of metal central atoms with the polysaccharide ligand. The carboxylic groups of xanthan gum were preferably involved in the ligation of the central atoms. Cu(II), Co(II) and Fe(III) ions were most readily coordinated by xanthan gum whereas Mn(II) cations were coordinated most randomly. Sometimes, the copper central atom resided in dimeric form.

Key words: clathrates, hydrocolloids, macro ligands, polysaccharides, thermal analysis, Werner complexes.

Wojciech Ciesielski
Institute of Chemistry, Environmental Protection and Biotechnology, Jan Długosz Academy, Częstochowa, Poland
Armii Krajowej 21
42-200 Częstochowa
email: w.ciesielski@interia.pl

Piotr Tomasik
Nantes Nanotechnological Systems, Bolesławiec, Poland
Dolne Młyny 21
59-700 Bolesławiec
email: rrtomasi@cyf-kr.edu.pl

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.