(19)

(11)

EP 0 074 976 A1

(12)

(43) Date of publication: 30.03.1983 Bulletin 1983/13 (21) Application number: 82900919.0 (22) Date of filing: 31.03.1982

(51) International Patent Classification (IPC):  G01N 21/ 43( . ) G01N 21/ 53( . ) (86) International application number: PCT/AU1982/000046 (87) International publication number: WO 1982/003460 (14.10.1982 Gazette 1982/25)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 31.03.1981 AU 19810008240 (71) Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Parkville, VIC 3052 (AU)	(72) Inventor: COOGAN, Clive Keith Canterbury, Vic. 3126 (AU)