Process for stabilizing the content of glycated protein of a sample on a matrix material
First Claim
1. An element for collecting, transporting or storing a sample to be analyzed, said element comprises an absorptive matrix material, wherein the matrix material is a fibrous material carrying a water soluble, non-ionically bound transition metal salt which dissolves off of said matrix material by an aqueous solution, andwherein the element contains a first layer and a second layer of absorptive material, said first and second layers positioned on an inert carrier and in contact with each other to enable transfer of a liquid in such a way that the liquid can pass from the first layer into the second layer when the first layer is filled with the liquid and wherein the first layer can be completely separated from the second layer after application and drying of the sample.
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Abstract
The invention concerns a method for stabilizing the content of glycated protein in a sample on a matrix material, which is characterized in that the matrix material is impregnated with boric acid buffer with a pH which is larger or equal to 10.5 or a transition metal salt as well as an appropriate matrix material, an element for collecting, transporting and storing sample material to be analysed with such a matrix material and a system containing such an element and a sealable covering.
130 Citations
21 Claims
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1. An element for collecting, transporting or storing a sample to be analyzed, said element comprises an absorptive matrix material, wherein the matrix material is a fibrous material carrying a water soluble, non-ionically bound transition metal salt which dissolves off of said matrix material by an aqueous solution, and
wherein the element contains a first layer and a second layer of absorptive material, said first and second layers positioned on an inert carrier and in contact with each other to enable transfer of a liquid in such a way that the liquid can pass from the first layer into the second layer when the first layer is filled with the liquid and wherein the first layer can be completely separated from the second layer after application and drying of the sample.
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4. An element for collecting a liquid sample containing a glycated protein, said element comprising:
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a first layer impregnated with a dried boric acid and buffer combination selected to maintain a solution at a pH of at least 10.5 when solubilized or a transition metal salt; and a second layer positioned on the element in contact with the first layer, said second layer comprising a material selected to have greater absorption of the liquid material than the first layer, wherein the first layer is separable from the second layer. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for collecting, transporting or storing a sample to be analyzed, said system comprising:
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an element comprising a first layer impregnated with a dried boric acid and buffer combination selected to maintain a solution at a pH of at least 10.5 when solubilized or a transition metal salt and a second layer positioned in contact with the first layer, said second layer comprising a material selected to have greater absorption of the liquid material than the first layer, wherein the first layer is separable from the second layer; and
,a sealable covering configured to receive the element. - View Dependent Claims (18, 19, 20, 21)
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Specification