(19)

(11)

EP 0 946 435 A1

(12)

(43) Date of publication: 06.10.1999 Bulletin 1999/40 (21) Application number: 97909064.0 (22) Date of filing: 29.10.1997

(51) International Patent Classification (IPC):  C02F 11/ 14( . ) G01N 15/ 02( . ) (86) International application number: PCT/AU1997/000723 (87) International publication number: WO 1998/018730 (07.05.1998 Gazette 1998/18)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 29.10.1996 AU 1996PO03285 (71) Applicant: UNISEARCH LIMITED Sydney, NSW 2052 (AU)	(72) Inventors: WAITE, David Wombarra, NSW 2515 (AU) AMAL, Rose Malabar, NSW 2036 (AU) GUAN, Jing Kingsford, NSW 2032 (AU) BUSTAMANTE, Heriberto, Alejandro Sylvania, NSW 2114 (AU) WUKASCH, Ronald F., Purdue University School West Lafayette, IN 47907-1284 (US) (74) Representative: Lucas, Brian Ronald, et al  Lucas & Co. 135 Westhall Road Warlingham Surrey CR6 9HJ Warlingham Surrey CR6 9HJ (GB)