DK160221B - Kuvette til engangsbrug - Google Patents
Kuvette til engangsbrug Download PDFInfo
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- DK160221B DK160221B DK497384A DK497384A DK160221B DK 160221 B DK160221 B DK 160221B DK 497384 A DK497384 A DK 497384A DK 497384 A DK497384 A DK 497384A DK 160221 B DK160221 B DK 160221B
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- cuvette
- membrane
- reagent
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- 239000012528 membrane Substances 0.000 claims description 64
- 239000003153 chemical reaction reagent Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000004458 analytical method Methods 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 238000003556 assay Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 238000004108 freeze drying Methods 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 108090000790 Enzymes Proteins 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 229940088598 enzyme Drugs 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- 108010015776 Glucose oxidase Proteins 0.000 description 1
- 239000004366 Glucose oxidase Substances 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 108010046334 Urease Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- GTKRFUAGOKINCA-UHFFFAOYSA-M chlorosilver;silver Chemical compound [Ag].[Ag]Cl GTKRFUAGOKINCA-UHFFFAOYSA-M 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 150000003983 crown ethers Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229940116332 glucose oxidase Drugs 0.000 description 1
- 235000019420 glucose oxidase Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000007793 ph indicator Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/04—Closures and closing means
- B01L2300/046—Function or devices integrated in the closure
- B01L2300/048—Function or devices integrated in the closure enabling gas exchange, e.g. vents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/06—Auxiliary integrated devices, integrated components
- B01L2300/0627—Sensor or part of a sensor is integrated
- B01L2300/0645—Electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/06—Auxiliary integrated devices, integrated components
- B01L2300/0681—Filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0809—Geometry, shape and general structure rectangular shaped
- B01L2300/0822—Slides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
- B01L2300/0864—Configuration of multiple channels and/or chambers in a single devices comprising only one inlet and multiple receiving wells, e.g. for separation, splitting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
- B01L2400/0406—Moving fluids with specific forces or mechanical means specific forces capillary forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N2021/0346—Capillary cells; Microcells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/775—Indicator and selective membrane
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/0332—Cuvette constructions with temperature control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S435/00—Chemistry: molecular biology and microbiology
- Y10S435/81—Packaged device or kit
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Biochemistry (AREA)
- Plasma & Fusion (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hematology (AREA)
- Clinical Laboratory Science (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Optical Measuring Cells (AREA)
- Sampling And Sample Adjustment (AREA)
- Paper (AREA)
- External Artificial Organs (AREA)
Description
DK 160221B
Den foreliggende opfindelse vedrører en kuvette til engangsbrug og beregnet til i al væsentligt samtidig prøvetagning af en væskeprøve og analyse af prøven.
En kuvette til prøvetagning af væske, blanding af prøven med et rea-5 gens og direkte udførelse af en optisk analyse af prøven blandet med reagenset kendes allerede fra USA patentskrift nr. 4.088.448. Denne kuvette har et legeme med to plane flader, som definerer en optisk vej og er placeret med forudbestemt indbyrdes afstand, så at fladerne bestemmer den optiske vejlængde og afgrænser en hulhed med et indløb, 10 som forbinder hulheden med omgivelserne uden for legemet.
Hulheden har et forudbestemt volumen, og den forudbestemte afstand tillader indføring af prøven i hulheden under påvirkning af kapillær-kræfter. Der er desuden anbragt et reagens på hulhedens flade.
Denne kendte kuvette har mange fordele sammenlignet med konventionelt 15 benyttede indretninger. Den muliggør prøvetagning af væske, blanding og kemisk omsætning af prøven med et passende reagens fx farvefrem-kaldelse i den samme beholder, som benyttes til den efterfølgende måling. Den kuvette, som findes beskrevet i USA patentskrift nr.
4.088.448, forenkler altså prøvetagningsmetoden, reducerer antallet 20 af redskaber eller rekvisitter og forbedrer i de fleste tilfælde, afhængigt af analysetypen, analysenøjagtigheden betydeligt ved at gøre analyseprocessen uafhængig af arbejdsteknikken hos den person, som udfører analysen.
Den foreliggende opfindelse vedrører en forbedring af denne kendte 25 kuvette.
Til dette formål er der blevet udviklet en kuvette til engangsbrug og beregnet til i alt væsentligt samtidig prøvetagning af væske og analyse af prøven, hvilken kuvette har et legeme med mindst én hulhed, der begrænses af omsluttende vægge, idet der under påvirkning af 30 kapillærkræfter kan ske indføring af prøven i hulheden gennem et indløb, der forbinder hulheden med omgivelserne uden for legemet.
Kuvetten ifølge den foreliggende opfindelse er ejendommelig ved, at 2
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mindst en del af de vægge, der vender mod hulheden, består af en semipermeabel membran.
En fordel ved denne forbedrede kuvette er, at den kan benyttes til andre typer af målinger end optiske analyser, hvilket gør den anven-5 delig til analyser inden for et meget større område end den fra USA-patentskrift nr. 4.088.448 kendte kuvette. I overensstemmelse med den foreliggende opfindelse kan der således udføres målinger ved brug af forskellige elektroder, hvis flader presses mod den semipermeable membrans yderflade, foruden brug af optiske instrumenter. Inden for 10 den foreliggende opfindelses rammer falder desuden elektrode- eller sensorsystemer, der er integreret med, dvs. anbragt på eller indføjet i, det semipermeable membranmateriale.
En anden meget vigtig fordel ved kuvetten ifølge opfindelsen, sammenlignet med den allerede kendte kuvette, er, at brugen af membraner 15 muliggør, at prøvemediet kan skilles fra reagensmediet, og at forstyrrelser, der skyldes substanser, ufordelagtig pH-værdi, ufordelagtigt redox-miljø etc., kan undgås. Således kan der i den nye kuvette være indføjet ét eller flere reaktionssystemer, der er inkompatible, da den semipermeable membran fungerer som en barriere, der 20 forhindrer, at en komponent, fx et reagens, der findes i hulheden, når frem til og ødelægger reaktionen eller reaktionerne i membranen eller membranerne og omvendt. Denne anden fordel gør anvendelsesområdet for kuvetten ifølge den foreliggende opfindelse endnu større og egnet til en mangfoldighed af forskellige analyser.
25 De yderligere fordele ved den foreliggende opfindelse skyldes således brugen af den semiper-meable membran og muligheden for at kombinere denne membran med ydre eller indre elektroder.
Analyser baseret på brugen af semipermeable membraner og elektroder kendes allerede. Ved udnyttelsen af denne kendte teknik opstår der 30 imidlertid problemer med håndtering af prøven, forurening af elektroderne, der ofte er følsomme over for forurening, fordampning af prøven og påvirkning fra forskellige typer af gasser såsom oxygen i luften. Alle disse problemer kan undgås ved brug af kuvetten ifølge den foreliggende opfindelse.
3
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I overensstemmelse med den foreliggende opfindelse kan legemet bestå af glas eller et polymermateriale. Det er også muligt at fremstille hele legemet eller en væg af dette af semipermeabelt materiale, som i dette tilfælde fortrinsvis skal være selvbærende. Hvis membranmateri-5 alet ikke er i alt væsentligt selvbærende, kan det benyttes som en belægning på den flade af legemet, som vender mod hulheden. Et eventuelt reagens, der er anbragt på i det mindste en del af den flade af legemet, som vender mod hulheden, kan anbringes ved fordampning, frysetørring, sprøjtning eller silketrykning på kendt måde.
10 Den semipermeable membran kan have form af et separat membranlag eller to eller flere separate lag, der er forbundet med hinanden på en sådan måde, at de danner en sammensat membran. De forskellige reagenser kan være anbragt på den membranflade, der vender mod hulheden, og være anbragt på fladen ved fordampning, frysetørring, sprøjtning 15 eller silketryk etc. Det er også muligt at anbringe reagenserne som et lag på separate flader af membranen på en sådan måde, at dette lag danner et mellemlag i den færdige, sammensatte membran. Der kan findes ét eller flere sådanne lag. Den semipermeable membran kan også være fremstillet på en sådan måde, at reagenset eller reagenserne er 20 dispergeret eller opløst i hele membranmaterialet eller i ét eller flere lag i dette. En anden mulighed er, at membranmaterialet er fremstillet på en sådan måde, at reagensmolekylerne bindes kovalent til polymermolekylerne i den semipermeable membran.
Materialet i den semipermeable membran vælges afhængigt af den type 25 analyse, som skal udføres, og kan bestemmes af fagmanden. Membran-materialet kan være hydrofilt eller hydrofobt. Eksempler på forskellige materialer, som kan benyttes i overensstemmelse med den foreliggende opfindelse, er Teflon®, siliconegummi, polyacrylat, polyvinyl, collagen og endog tværbundne enzymer etc. I membranen kan der 30 være indføjet forskellige substanser, så at der opnås bestemte selektive egenskaber, så at en kemisk reaktion kan udføres etc. Hvis der indføjes specifikke kronethere i en polyvinylmembran, får membranen selektive egenskaber over for alkaliioner. Hvis der indføjes glucose-oxidase i en membran, bliver det muligt at måle glucose ved dannelse 35 af hydrogenperoxid eller en reduktion i oxygenkoncentrationen.
4
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Membranen kan selektivt tillade gennemtrængning af udelukkende eller i alt væsentligt kun den substans/ion, som er relevant/interessant, og som kan påvises fx med en elektrode på membranens ydre flade.
Membranen kan desuden fungere som en diskriminator, i hvilken kun 5 molekyler/ioner under en vis størrelse kan bevæge sig frit.
Ved målinger med elektroder på eller i den forbedrede kuvette fungerer membranen som en semipermeabel barriere (med eller uden selektive egenskaber), hvilket hindrer, at elektroden bliver forurenet af prøvemediet og/eller reagenset. Membranen kan deltage i en kemisk 10 reaktion via et indføjet reagens og/eller selektivt tillade fri passage for de emner, som skal bestemmes ved hjælp af elektroden.
Den elektrode, som benyttes i overensstemmelse med den foreliggende opfindelse kan være en konventionel potentiometrisk, ionselektiv eller amperemetrisk elektrode, der sammen med den semipermeable 15 membran i kuvetten fungerer som en enzymelektrode eller biosensor af den type, der findes beskrevet i fx P. Vadgama, Journal of Medical Engineering & Technology, bind 5, nr. 6, 1981, s. 293-298.
Eksempler på elektroder, som kan benyttes sammen med membrankuvetten ifølge den foreliggende opfindelse, er konventionelle elektroder 20 såsom en glaselektrode (pH), en platin-, guld- eller carbonelektrode eller andre mere specielle elektroder, såsom halvlederindretninger såsom CHEMFET's eller ISFET's med tilhørende elektroniske dele.
Et eksempel på et platin/sølv-sølvchloridelektrodesystem, der sammen med en sammensat membran er indrettet til bestemmelse af glucose ved 25 amperemetrisk måling af forbruget af oxygen, findes i en artikel af Jean-Louis Romtte, B, Fromment & D. Thomas (Clin. Chim. Acta, 95, 1979, s. 249-253).
Et eksempel på brugen af en glaselektrode sammen med en sammensat membran til måling af urinstof ved måling af pH-værdien af dannet 30 ammoniak er beskrevet i en artikel af M. Mascini og G.G. Guilbault, (Anal. Chem., bind 49, nr. 6, maj 77, s. 795-798).
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Hvad angår optiske analyser, som kan udføres med kuvetten ifølge den foreliggende opfindelse, findes der i hovedsagen to muligheder: A: Farven udvikles i hulheden og B: Farven udvikles i membranen.
5 Ved "A" skal hulhedens to hovedflader ligge i en forudbestemt indbyrdes afstand eller i en afstand, som kan bestemmes, så at det bliver muligt at bestemme den optiske vejlængde. Den afstand, som kan bestemmes, kan frembringes ved, at der påføres en ydre kraft på fladen af en i alt væsentligt elastisk membran, indtil membranens belt) vægelse standses af en afstandsholder med forudbestemt tykkelse, hvilken afstandsholder er indført i hulheden.
Ved "B" skal den farvefremkaldende del (lag) af membranen eller hele membranen have en forudbestemt tykkelse, så at der opnås en forudbestemt optisk vejlængde.
15 Et praktisk eksempel på "B" er en kuvette, der er udformet til analyse af urinstof i serum eller urin. Hulheden indeholder urease og et alkalisk puffersystem i tør form, hvilket, når det opløses i prøvemediet, frigiver ammoniak fra urinstoffet, og membranen indeholder en indikator (- et reagens) til ammoniak. Membranen er fremstillet af et 20 polymermateriale, hvis hydrofobicitet er tilstrækkelig stor til at forhindre forstyrrelse fra den alkaliske puffer på indikatoren, men som tillader ammoniak at passere. Indikatoren udgøres af en i opløsningsmidlet opløselig pH-indikator med et indikatorinterval inden for det sure område.
25 Der kan benyttes forskellige metoder i forbindelse med analyserne ved anvendelse af forskellige typer af elektroder, forskellige typer af membraner og forskellige reaktionsveje, hvilket vil være åbenbart for fagmanden.
Opfindelsen vil i det følgende blive nærmere forklaret under henvis-30 ning til tegningen, på hvilken der skematisk og i stor målestok er vist forskellige udførelsesformer, og på hvilken fig. 1 viser en målekuvette ifølge den foreliggende opfindelse, 6
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fig. la et snit efter linjen I-I i fig. 1, fig. 2a en modificeret udførelsesform for kuvetten, fig. 2b en del af fig. 2a, fig. 3 den i fig. 2 og 2a viste kuvette i kontakt med en måleelektro-5 de, fig. 4 den i fig. 2 og 2a viste kuvette indrettet til optisk måling, fig. 5 en udførelsesform, i hvilken kuvetten har parallelforbundne hulheder, fig. 5a et snit efter linjen II-II, 10 fig. 6 en anden modificeret udførelsesform for kuvetten og fig. 6a et snit efter linjen III-III.
Den kuvette, som er vist i fig. 1 og la, har en væg 10 af glas eller polymermateriale og en væg 11 af en membran af semipermeabelt materiale. Væggene afgrænser en hulhed 12, der er beregnet til at rumme en 15 væskeprøve, og som har sådanne dimensioner, at hulheden kan fyldes ved påvirkning fra kapillærkræfter. Fra modstående sider af kuvetten strækker der sig to kanaler 13, som udmunder i hulheden 12. Der kan således indføres en prøve gennem kuvetten, hvilket kan være fordelagtigt under visse forhold. Hulheden 12 kan forsynes med et reagens 20 (dvs. et middel, der reagerer med den prøve, som indføres i hulheden) ved fordampning, frysetørring, sprøjtning, silketrykning eller en anden passende måde afhængigt af den måde, hvorpå kuvetten fremstilles.
Væggen 11 af semipermeabelt membranmateriale kan fremstilles på en 25 sådan måde, at der i membranen indgår et reagenssystem, fx disper- geret eller opløst i membranen. Det er også muligt at fremstille membranen på en sådan måde, at reagenssystemets komponenter (molekyler) bindes covalent til de polymerer, som danner membranmaterialet. En anden mulighed er, at der opbygges en semipermeabel membran af to 30 eller flere lag, og at reagenssystemet eller reagenssysternerne anbringes som mellemlag mellem to mod hinanden liggende membranlag.
Der kan. findes et eller flere sådanne lag og mellemliggende lag. Alle typer af kombinationer og måder til indføjning af reagenssystemer, som er åbenbare for fagfolk, falder inden for den foreliggende opfin-35 delses rammer.
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DK 160221 B
I fig. 2a angiver henvisningsbetegnelsen 10 en væg af polymert bærende materiale. 11 angiver en semipermeabel membran, der eventuelt er sammensat af flere lag. 12 betegner den hulhed, som indeholder prøven. Ophøjninger 14 bestemmer den optiske vejlængde. Når prøven 5 indføres i hulheden 12, presses der luft ud gennem sprækken 15.
Væggen 10 og den semipermeable membran 11 er føjet sammen langs forbindelsen 16 (en svejse- eller limforbindelse). Området 17 angiver en passende målezone.
I fig. 3 er der anbragt en måleelektrode i kontakt med den semiper-10 meable membran 11 i den i fig. 2a og 2b viste kuvette. I denne specielle udførelsesform består elektroderne af en platinelektrode 18 og en reference-sølv/sølvehloridelektrode 19. Henvisningsbetegnelsen 20 angiver det glaslegeme, som omslutter platinelektroden 18.
I fig. 4 er den i fig. 2a og 2b viste kuvette indrettet til optisk 15 måling. Henvisningsbetegnelsen 21 angiver således en lyskilde til fx monokromatisk lys. Henvisningsbetegnelsen 22 angiver lysets vej mod kuvetten. Henvisningsbetegnelsen 23 angiver lysets vej for ikke-ab-sorberet lys efter kuvetten, og henvisningsbetegnelsen 24 angiver en optisk detektor.
20 Den i fig. 5 viste kuvette har fire parallelforbundne hulheder 25, 25', der er forbundet til en fælles kanal 26 via forgreningskanaler 27, der fortsætter på modstående sider af hulhederne og udmunder i atmosfæren og forhindrer indespærring af luft i hulhederne, når prøverne indføres i disse. Der kan være indesluttet forskellige reaktive 25 systemer i de forskellige hulheder og/eller i det membranmateriale, som begrænser hele eller en del af hulheden.
I fig. 5a er vist et snit efter linjen II-II i fig. 5.
I en udførelsesform, der er· vist i fig. 6 og 6a, af den foreliggende opfindelse består hele kuvetten af et elastisk semipermeabelt materi-30 ale. En indløbskanal 28 står i forbindelse med omgivelserne (uden for kuvetten) via en hulhed 12.
Claims (10)
1. Kuvette til engangsbrug til i alt væsentligt samtidig prøvetagning af væske og analyse af en prøve og med et legeme med mindst én hulhed 15 (12, 25, 25'), der begrænses af omsluttende vægge (10, 11), i hvilken hulhed (12, 25, 25') prøven kan indføres - ved påvirkning af kapil-lærkræfter - gennem et indløb (13, 26, 27, 28), der forbinder hulheden (12, 25, 25') med omgivelserne uden for legemet, kendetegnet ved, at mindst en del af de vægge (10, 11), som 20 vender mod hulheden (12, 25, 25'), består af en semipermeabel membran.
2. Kuvette ifølge krav 1, kendetegnet ved, at der i det semipermeable materiale er integreret et elektrode- og/eller sensorsystem.
3. Kuvette ifølge krav 1 eller 2, kendetegnet ved, at der i kuvetten er indføjet mindst ét reagens eller reagenssystem.
4. Kuvette ifølge et hvilket som helst af de foregående krav, kendetegnet ved, at den semipermeable membran består af ét 30 eller flere lag. DK 160221 B
5. Kuvette ifølge et hvilket som helst af de foregående krav, kendetegnet ved, at der findes eller kan anbringes mindst ét reagens eller reagenssystem i eller på den semipermeable membran eller i eller på ét eller flere lag af samme.
6. Kuvette ifølge et hvilket som helst af de foregående krav, kendetegnet ved, at et reagens eller et reagenssystem er dispergeret eller opløst i membranen eller i det mindste i et lag af samme og/eller er an-bragt som mindst ét mellemliggende lag mellem to mod hinanden liggende membranlag.
7. Kuvette ifølge et hvilket som helst af de foregående krav, kendetegnet ved, at reagensets eller reagenssystemets molekyler er bundet covalent til polymererne i den semipermeable membran eller et lag af samme.
8. Kuvette ifølge et hvilket som helst af de foregående krav, 15 kendetegnet ved, at der er anbragt et reagens eller et reagenssystem på i det mindste en del af den flade, som vender mod hulheden.
9. Kuvette ifølge et hvilket som helst af de foregående krav, kendetegnet ved, at to plane flader af hulheden definerer 20 en optisk vejlængde.
10. Kuvette ifølge et hvilket som helst af de foregående krav, kendetegnet ved, at den semipermeable membran eller et lag af samme har en forudbestemt tykkelse, som definerer en optisk vejlængde .
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8305704 | 1983-10-18 | ||
| SE8305704A SE8305704D0 (sv) | 1983-10-18 | 1983-10-18 | Cuvette |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| DK497384D0 DK497384D0 (da) | 1984-10-17 |
| DK497384A DK497384A (da) | 1985-04-19 |
| DK160221B true DK160221B (da) | 1991-02-11 |
| DK160221C DK160221C (da) | 1991-07-15 |
Family
ID=20352930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK497384A DK160221C (da) | 1983-10-18 | 1984-10-17 | Kuvette til engangsbrug |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4654197A (da) |
| EP (1) | EP0138152B1 (da) |
| JP (1) | JPS60100742A (da) |
| CA (1) | CA1252701A (da) |
| DE (1) | DE3475834D1 (da) |
| DK (1) | DK160221C (da) |
| FI (1) | FI81677C (da) |
| NO (1) | NO162833C (da) |
| SE (1) | SE8305704D0 (da) |
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-
1983
- 1983-10-18 SE SE8305704A patent/SE8305704D0/xx unknown
-
1984
- 1984-10-03 DE DE8484111803T patent/DE3475834D1/de not_active Expired
- 1984-10-03 EP EP84111803A patent/EP0138152B1/en not_active Expired
- 1984-10-10 CA CA000465095A patent/CA1252701A/en not_active Expired
- 1984-10-12 US US06/660,466 patent/US4654197A/en not_active Expired - Lifetime
- 1984-10-17 DK DK497384A patent/DK160221C/da not_active IP Right Cessation
- 1984-10-17 NO NO844150A patent/NO162833C/no not_active IP Right Cessation
- 1984-10-18 FI FI844104A patent/FI81677C/fi not_active IP Right Cessation
- 1984-10-18 JP JP59217512A patent/JPS60100742A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| CA1252701A (en) | 1989-04-18 |
| NO162833C (no) | 1990-02-21 |
| NO162833B (no) | 1989-11-13 |
| FI844104L (fi) | 1985-04-19 |
| SE8305704D0 (sv) | 1983-10-18 |
| FI81677C (fi) | 1990-11-12 |
| EP0138152A2 (en) | 1985-04-24 |
| NO844150L (no) | 1985-04-19 |
| DE3475834D1 (de) | 1989-02-02 |
| EP0138152A3 (en) | 1986-01-15 |
| EP0138152B1 (en) | 1988-12-28 |
| DK497384D0 (da) | 1984-10-17 |
| JPS60100742A (ja) | 1985-06-04 |
| JPH0561577B2 (da) | 1993-09-06 |
| FI844104A0 (fi) | 1984-10-18 |
| DK497384A (da) | 1985-04-19 |
| FI81677B (fi) | 1990-07-31 |
| DK160221C (da) | 1991-07-15 |
| US4654197A (en) | 1987-03-31 |
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