(19)

(11)

EP 0 678 032 A1

(12)

(43) Date of publication: 25.10.1995 Bulletin 1995/43 (21) Application number: 94917343.0 (22) Date of filing: 10.05.1994

(51) International Patent Classification (IPC):  G01N 33/ 49( . ) G01N 33/ 543( . ) (86) International application number: PCT/US1994/005188 (87) International publication number: WO 1994/026299 (24.11.1994 Gazette 1994/26)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 13.05.1993 US 19930061646 (71) Applicant: Becton Dickinson and Company Franklin Lakes, New Jersey 07417-1880 (US)	(72) Inventor: HASSKAMP, Joanne Haller Towson, MD 21204 (US) (74) Representative: von Kreisler, Alek, Dipl.-Chem.  Patentanwälte, von Kreisler-Selting-Werner, Bahnhofsvorplatz 1 (Deichmannhaus) D-50667 Köln D-50667 Köln (DE)