(19)

(11)

EP 0 235 236 A1

(12)

(43) Date of publication: 09.09.1987 Bulletin 1987/37 (21) Application number: 86905373.0 (22) Date of filing: 16.09.1986

(51) International Patent Classification (IPC):  G01N 35/ 02( . ) B08B 3/ 02( . ) B01L 11/ 00( . ) G01N 33/ 543( . ) (86) International application number: PCT/GB1986/000552 (87) International publication number: WO 1987/001616 (26.03.1987 Gazette 1987/07)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 16.09.1985 GB 19850022872 (71) Applicant: FLOW LABORATORIES LIMITED Irvine Ayrshire Scotland KA12 8NB (GB)	(72) Inventors: FREEMAN, Richard, Harry, Mark Ayrshire KA7 2SA (GB) YEUDALL, Abram, David Ayrshire KA16 9EQ (GB) (74) Representative: Brereton, Paul Arthur  REDDIE & GROSE 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)