(19)

(11)

EP 0 056 415 A1

(12)

(43) Date of publication: 28.07.1982 Bulletin 1982/30 (21) Application number: 81902328.0 (22) Date of filing: 24.07.1981

(51) International Patent Classification (IPC):  G01N 21/ 01( . ) G01N 21/ 25( . ) (86) International application number: PCT/FI1981/000060 (87) International publication number: WO 1982/000356 (04.02.1982 Gazette 1982/04)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL SE (30) Priority: 24.07.1980 FI 19800002342 (71) Applicant: LABSYSTEMS OY SF-00810 Helsinki 81 (FI)	(72) Inventor: SUOVANIEMI, Osmo SF-00570 Helsinki 57 (FI) (74) Representative: Tillbrook, Christopher John  c/o Reginald W. Barker & Co., Chancery House, 53-64, Chancery Lane London, WC2A 1QU London, WC2A 1QU (GB)