(19)

(11)

EP 0 088 781 A1

(12)

(43) Date of publication: 21.09.1983 Bulletin 1983/38 (21) Application number: 82902816.0 (22) Date of filing: 20.09.1982

(51) International Patent Classification (IPC):  G01N 21/ 25( . ) G01N 21/ 64( . ) (86) International application number: PCT/FI1982/000036 (87) International publication number: WO 1983/001111 (31.03.1983 Gazette 1983/08)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 21.09.1981 FI 19810002933 (71) Applicant: EFLAB OY F-00810 Helsinki 81 (FI)	(72) Inventor: VIRNES, Martti SF-00270 Helsinki 27 (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)