(19)
(11) EP 1 058 845 A1

(12)

(43) Date of publication:
13.12.2000 Bulletin 2000/50

(21) Application number: 99909636.5

(22) Date of filing: 25.02.1999
(51) International Patent Classification (IPC)7: G01N 31/22
(86) International application number:
PCT/US9904/200
(87) International publication number:
WO 9944/056 (02.09.1999 Gazette 1999/35)
(84) Designated Contracting States:
DE FR GB

(30) Priority: 27.02.1998 US 76137 P

(71) Applicant: The Government of the United States represented by the Secretary of the Department of Health and Human Services
Atlanta, GA 30333 (US)

(72) Inventors:
  • WANG, Jin
    Cincinnati , OH 45231 (US)
  • ASHLEY, Kevin
    Cincinnati, OH 45252 (US)

(74) Representative: HOFFMANN - EITLE 
Patent- und RechtsanwälteArabellastrasse 4
81925 München
81925 München (DE)

   


(54) METHOD FOR THE DETERMINATION OF HEXAVALENT CHROMIUM USING ULTRASONICATION AND STRONG ANION EXCHANGE SOLID PHASE EXTRACTION