(19)

(11)

EP 0 091 924 A1

(12)

(43) Date of publication: 26.10.1983 Bulletin 1983/43 (21) Application number: 82903132.0 (22) Date of filing: 27.10.1982

(51) International Patent Classification (IPC):  G01N 27/ 49( . ) (86) International application number: PCT/AU1982/000175 (87) International publication number: WO 1983/001687 (11.05.1983 Gazette 1983/11)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 29.10.1981 AU 19810001334 (71) Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION Parkville, VIC 3052 (AU)	(72) Inventors: SHORT, David Leslie Yenda NSW 2681 (AU) SHELL, Graeme Stanley Gibb Yenda, NSW 2681 (AU)