(19)

(11)

EP 0 220 246 A1

(12)

(43) Date of publication: 06.05.1987 Bulletin 1987/19 (21) Application number: 86902775.0 (22) Date of filing: 28.04.1986

(51) International Patent Classification (IPC):  G01N 33/ 569( . ) (86) International application number: PCT/AU1986/000114 (87) International publication number: WO 1986/006382 (06.11.1986 Gazette 1986/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 26.04.1985 AU 19850000326 (71) Applicant: THE STATE OF VICTORIA Melbourne Victoria 3000 (AU)	(72) Inventor: SMART, Ian, James North Caulfield, VIC 3182 (AU) (74) Representative: Moon, Donald Keith  BREWER & SON Quality House Quality Court Chancery Lane London WC2A 1HT London WC2A 1HT (GB)