(19)

(11)

EP 0 056 821 A1

(12)

(43) Date of publication: 04.08.1982 Bulletin 1982/31 (21) Application number: 81902330.0 (22) Date of filing: 24.07.1981

(51) International Patent Classification (IPC):  G01N 21/ 03( . ) (86) International application number: PCT/FI1981/000062 (87) International publication number: WO 1982/000358 (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 19800002344 (71) Applicant: LABSYSTEMS OY SF-00810 Helsinki 81 (FI)	(72) Inventor: SUOVANIEMI, Osmo SF-00570 Helsinki 57 (FI)