(19)

(11)

EP 0 843 817 A1

(12)

(43) Date of publication: 27.05.1998 Bulletin 1998/22 (21) Application number: 96928401.0 (22) Date of filing: 30.07.1996

(51) International Patent Classification (IPC):  B01L 3/ 00( . ) G01N 33/ 558( . ) G01N 35/ 04( . ) G01N 33/ 543( . ) G01N 33/ 569( . ) (86) International application number: PCT/EP1996/003380 (87) International publication number: WO 1997/006437 (20.02.1997 Gazette 1997/09)

(84) Designated Contracting States: AT BE CH DE ES FI FR GB IE IT LI NL SE (30) Priority: 03.08.1995 EP 19950202118 (71) Applicant: Akzo Nobel N.V. 6824 BM Arnhem (NL)	(72) Inventors: VAN DAMME, Hendrik, Sibolt NL-5211 LG Den Bosch (NL) PELSSERS, Eduard, Gerard, Marie 7827 DG Emmen (NL) KAELEN, Henricus, Joseph, Ida, Theodorus NL-5386 CT Geffen (NL) (74) Representative: Van Gent, Marieke  N.V. Organon, Postbus 20 5340 BH Oss 5340 BH Oss (NL)