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1. EP0580863 - COMPOSITION FOR MEASURING IONIC STRENGTH OR SPECIFIC GRAVITY OF LIQUID SPECIMEN AND TEST PIECE PREPARED FROM SAID COMPOSITION

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Office
European Patent Office
Application Number 92908526
Application Date 10.04.1992
Publication Number 0580863
Publication Date 02.02.1994
Publication Kind B1
IPC
G01N 9/36
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
9Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
36Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
G01N 31/22
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
31Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroups; Apparatus specially adapted for such methods
22using chemical indicators
G01N 33/52
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/-G01N31/131
48Biological material, e.g. blood, urine; Haemocytometers
50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
52Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper
CPC
G01N 9/36
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
9Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
36Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
G01N 33/52
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
48Biological material, e.g. blood, urine
50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
52Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper ; and including single- and multilayer analytical elements
G01N 33/521
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
48Biological material, e.g. blood, urine
50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
52Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper ; and including single- and multilayer analytical elements
521Single-layer analytical elements
Applicants EIKEN CHEMICAL
Inventors HARAKO MIEKO
Designated States
Priority Data 1991106735 11.04.1991 JP
9200459 10.04.1992 JP
Title
(DE) ZUSAMMENSETZUNG FÜR DIE MESSUNG DER IONENSTÄRKE ODER DES SPEZIFISCHEN GEWICHTS EINER FLÜSSIGEN PROBE UND TESTVORRICHTUNG, DIE AUS BESAGTER ZUSAMMENSETZUNG GEFERTIGT WURDE
(EN) COMPOSITION FOR MEASURING IONIC STRENGTH OR SPECIFIC GRAVITY OF LIQUID SPECIMEN AND TEST PIECE PREPARED FROM SAID COMPOSITION
(FR) COMPOSITION POUR MESURER LA FORCE IONIQUE OU LE POIDS SPECIFIQUE D'UN ECHANTILLON DE LIQUIDE ET EPROUVETTE PREPAREE A PARTIR DE CETTE COMPOSITION
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Abstract
(EN) A composition for measuring the ionic strength or specific gravity of a liquid specimen and to a test piece prepared from said composition. Specifically, the invention concerns a composition constituted of, for example, one weight percent of heparin sodium in refined water and 1 mM of Methylene Blue, and a test piece in which test paper consisting of filter paper which is impregnated with a solution of said composition, dried, and cut to size is stuck to a plastic piece. The use of said composition and test piece enables easy, simple, quick but exact measurement of the ionic strength or specific gravity of a liquid specimen without influenced by the characteristics of said specimen, such as pH and temperature.
(FR) L'invention se rapporte à une composition qui sert à mesurer la force ionique ou le poids spécifique d'un échantillon de liquide, ainsi qu'à une éprouvette préparée à partir de cette composition. Plus particulièrement, l'invention décrit une composition constituée par exemple par 1 pour cent en poids de sodium d'héparine dans de l'eau purifiée et par 1 mM de bleu de méthylène, ainsi qu'une éprouvette dans laquelle du papier réactif composé de papier filtre, imprégné d'une solution de cette composition, séché et découpé à la grandeur voulue est collé à une bande de plastique. L'utilisation de cette composition et de cette éprouvette permet d'effectuer aisément et de façon simple et rapide des mesures néanmoins exactes de la force ionique ou du poids spécifique d'un échantillon de liquide, sans que ces mesures soient affectées par les caractéristiques de l'échantillon, telles que le pH et la température.
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