(19)

(11)

EP 0 066 617 A1

(12)

(43) Date of publication: 15.12.1982 Bulletin 1982/50 (21) Application number: 82900420.0 (22) Date of filing: 10.12.1981

(51) International Patent Classification (IPC):  G01N 21/ 62( . ) (86) International application number: PCT/US1981/001651 (87) International publication number: WO 1982/002091 (24.06.1982 Gazette 1982/16)

(84) Designated Contracting States: CH DE FR GB LI NL (30) Priority: 10.12.1980 US 19800214919 (71) Applicant: BECKMAN INSTRUMENTS, INC. Fullerton California 92634 (US)	(72) Inventor: PEACOCK, Jon R. Mission Viejo, CA 92691 (US)