EP 0910447 A1 19990428 - METHOD FOR THE COLORIMETRIC QUANTIFICATION OF IONS
Title (en)
METHOD FOR THE COLORIMETRIC QUANTIFICATION OF IONS
Title (de)
METHODE ZUR KOLORIMETRISCHEN QUANTIFIZIERUNG VON IONEN
Title (fr)
PROCEDE DE QUANTIFICATION COLORIMETRIQUE D'IONS
Publication
Application
Priority
- US 9711446 W 19970707
- US 67912396 A 19960712
Abstract (en)
[origin: WO9802224A1] A method for the colorimetric quantification of a targeted ion from a source solution, which may contain other ions in greater concentrations, comprises bringing a measured volume of the source solution into contact with a porous web or membrane having enmeshed therein an ion recognition substrate which has a selective affinity for the targeted ion. The ion recognition substrate selectively and quantitatively traps the targeted ion, for example, through covalent, or ionic bonds, chelation, complexation or organo-metal dative bonds. Following removal of the source solution, the concentration of the targeted ion in the original solution, may be detected and quantified by, for example, visual comparison or densitometric techniques. The ions which are trapped in the web or membrane can be (a) self-colored through interaction with the ion recognition substrate or (b) subjected to a second solution whicn contains a developer. The developer, which may be colorless or of a different color, is chosen because it will selectively react with the targeted ion or, because of the presence of the targeted ion, cause the formation of a colored or color changed product. The density of the color can be correlated to the concentration of the targeted ion in the measured source solution.
IPC 1-7
IPC 8 full level
G01N 21/78 (2006.01); B01D 15/00 (2006.01); B01D 71/26 (2006.01); B01D 71/36 (2006.01); B01J 20/32 (2006.01); C02F 1/44 (2006.01)
CPC (source: EP)
B01D 15/00 (2013.01); B01J 20/321 (2013.01); B01J 20/3212 (2013.01); B01J 20/3219 (2013.01); B01J 20/3248 (2013.01); B01J 20/3251 (2013.01); B01J 20/3255 (2013.01)
Citation (search report)
See references of WO 9802224A1
Citation (third parties)
Third party :
- US 5567619 A 19961022 - STONE MARCIA J [US]
- US 4859606 A 19890822 - CRAM DONALD J [US], et al
- WO 9614931 A1 19960523 - MINNESOTA MINING & MFG [US]
- US 5179213 A 19930112 - BRADSHAW JERALD S [US], et al
- US 5071610 A 19911210 - HAGEN DONALD F [US], et al
- US 4810381 A 19890307 - HAGEN DONALD F [US], et al
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9802224 A1 19980122; CA 2256747 A1 19980122; EP 0910447 A1 19990428; JP 2000515968 A 20001128
DOCDB simple family (application)
US 9711446 W 19970707; CA 2256747 A 19970707; EP 97934036 A 19970707; JP 50606098 A 19970707