Abstract: The invention relates to an adsorbent agent with special advantages to heavy metals, proteins, etc. and is based upon a ligand with an atom sequence (A): N--C--C.sub.n --N, wherein n is 1 or 2, and one terminal, a ring atom N in a heteroaromatic ring system, together with a proximal ring atom C forms a first terminal. The second terminal --C.sub.n --N-- can be an integral part of a heteroaromatic ring system with one or more heteroatoms and through a crosslinking bridge D is attached to P. The first terminal N--C-- can be included in a pyridine or imidazole core. The polymer P is organic and hydrophilic such as polysaccharide, polyvinylalcohol, polyacrylamide, polyacrylester, polyethyleneimide or derivatives thereof, and can also be immobilized by crosslinking, binding or adsorption or inclusion in an inorganic bearer.

Abstract: The invention concerns a polymer product for immobilizing of metal ions, adsorption, and the like, with the structureP--X--A--Qwherein P is a hydrophilic polymer with a molecular weight of more than 3 000 Daltons. X is a heteroatom, O, S or N, A is an atom sequence with at least 3 carbon atoms, and Q is a group with at least two branches with terminal, metal, metal chelate forming substituents, each having at least two hetero atoms, N, O or S, separated by two or at most three carbon atoms in a sequence or Q is a macrocyclic ring with at least 8 and not more than 30 atoms, at least 3 of which are nitrogen atoms, in sequence in the ring, and the preparation thereof which is done by activating a hydrophilic polymer with epoxi or vinylsulfone or inserting of aldehyde groups, couupling with tris-(2-aminoethyl)-amin and treating with reagents chosen from .alpha.-haloalkanoate, .alpha.

Abstract: A solid phase can be coated superficially with a polymeric coating by substituting immobilized metal ions on the surface of the solid phase with a hydrophilic polymer or a derivative or aggregate thereof, through a chemisorption process. The solid phase may comprise a magnetic material, such as magnetite, and may have a particle form. The coating can be produced by bringing the solid phase into contact with a solution of a reagent which includes at least one metal chelating and one reactive group, and subsequently bringing the solid phase into contact with a solution of a compound which reacts with the chelater reagent adsorbed on the solid phase. The polymer layer may constitute a polyhydric alcohol, a polyamine, or a polyamide, for example a polysaccharide, such as agarose, a protein or a peptide, a polyacryl amide, etc. and the reactive group may be a vinylsulphone or an epoxide, an aminothiol or a hydroxyl.