(19)

(11)

EP 0 245 275 A1

(12)

(43) Date of publication: 19.11.1987 Bulletin 1987/47 (21) Application number: 86901309.0 (22) Date of filing: 20.02.1986

(51) International Patent Classification (IPC):  G01N 21/ 64( . ) (86) International application number: PCT/AU1986/000045 (87) International publication number: WO 1986/004988 (28.08.1986 Gazette 1986/19)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 20.02.1985 AU 19850009371 (71) Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Parkville, VIC 3052 (AU)	(72) Inventor: GARDNER, James, Laurie Turramurra, NSW 2074 (AU)