(19)

(11)

EP 2 002 249 A1

(12)

(43) Date of publication: 17.12.2008 Bulletin 2008/51 (21) Application number: 07758724.4 (22) Date of filing: 16.03.2007

(51) International Patent Classification (IPC):  G01N 27/333(2006.01) G01N 27/36(2006.01) (86) International application number: PCT/US2007/064204 (87) International publication number: WO 2007/109560 (27.09.2007 Gazette 2007/39)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 23.03.2006 US 785339 P 06.09.2006 US 516091 (71) Applicant: Hach Company Loveland, CO 80539 (US)	(72) Inventors: WOODWARD, John, Robert Windsor, Colorado 80550 (US) MOORE, Leon, Edward Windsor, Colorado 80550 (US) YOUNG, Russell, M. Fort Collins, Colorado 80525 (US) (74) Representative: Holmes, Matthew William  Ollila Lanoe LLP Wootton Park Farm, Wootton Wawen Henley-in-Arden, Warwickshire B95 6HJ Henley-in-Arden, Warwickshire B95 6HJ (GB)