Integral multilayer analytical element
First Claim
1. In an integral multilayer analytical element which comprises a water-impermeable light-transmissive support, a hydrophilic layer containing a water-absorptive hydrophilic polymer binder and a spreading layer superposed in this order, and containing at least one reagent capable of reacting with a component of a sample to produce a detectable species capable of detection by light, the improvement which comprises said hydrophilic layer containing light-scattering particulates in an amount to make light transmittance in the range from 10 to 2.5%.
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Abstract
An integral multilayer analytical element which comprises a water-impermeable light-transmissive support, a hydrophilic layer containing a water-absorptive hydrophilic polymer binder and a spreading layer superposed in this order, and contains at least one reagent capable of reacting with a component of a sample to produce a detectable species capable of detecting by light, which is characterized in that light-scattering particulates in an amount to make light transmittance to 10 to 2.5% are contained in the above hydrophilic layer and/or a layer located on the side of the support therefrom. This element may decrease the influence of a conventional reagent layer up to the extent being negligible without lowering the sensitivity. Precision of the measurement at a low concentration range is also high, and reproducibility of the meaurement is well. Manufacture of this element is easy.
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Citations
15 Claims
- 1. In an integral multilayer analytical element which comprises a water-impermeable light-transmissive support, a hydrophilic layer containing a water-absorptive hydrophilic polymer binder and a spreading layer superposed in this order, and containing at least one reagent capable of reacting with a component of a sample to produce a detectable species capable of detection by light, the improvement which comprises said hydrophilic layer containing light-scattering particulates in an amount to make light transmittance in the range from 10 to 2.5%.
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2. In an integral multilayer analytical element which comprises a water-impermeable light-transmissive support, a hydrophilic layer containing a water-absorptive hydrophilic polymer binder and a spreading layer superposed in this order, and containing at least one reagent capable of reacting with a component of a sample to produce a detectable species capable of detection by light, the improvement which comprises an additional layer on the same side of the support as said hydrophilic layer, said additional layer containing light-scattering particulates in an amount to make light transmittance in the range from 10 to 2.5%.
- 14. In a method for the detection of a blood component wherein a blood sample is placed on an integral multilayer analytical element and analyzed the improvement wherein said analytical element comprises a superposed in this order, a water-permeable light-transmissive support, a hydrophilic layer containing a water-absorptive hydrophilic polymer binder, and a spreading layer, and which further contains at least one reagent capable of reacting with a component of the sample to produce a detectable species capable of detection by light, and wherein said hydrophilic layer contains light scattering particulates in an amount to make the light transmittance in the range from 10 to 2.5%.
Specification