DEVICES AND METHOD FOR MEASURING ANALYTE CONCENTRATION IN PHYSIOLOGICAL FLUID SAMPLE Russian patent published in 2023 - IPC G01N33/52 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to the field of measuring analyte concentration in a sample of physiological fluid. An optical test strip for measuring the concentration of an analyte in a blood sample contains a) a carrier element of the test strip containing a transparent area; b) a test field, wherein the test field comprises at least one carrier element film, wherein the carrier element film is attached to the test strip carrier and covers a transparent area of the test strip carrier; contains at least one test chemical deposited on the carrier element film, wherein the test chemical is configured to carry out an optically detectable determination reaction with an analyte. The test chemical is further configured to partially absorb light having at least one absorption wavelength λ_absorb in the range of 650 nm < λ_absorb ≤ 1,100 nm; and contains at least one porous material for at least partially filtering out the solid components contained in the sample. The carrier element film comprises at least one wavelength filter component configured to substantially block light having wavelengthsλ _block constituting 10 nm ≤ λ_block ≤ WL_lower, with 550 nm ≤ WL_lower ≤ 650 nm. Also a method for measuring the concentration of an analyte in a blood sample and a kit for measuring the concentration of an analyte in a blood sample are disclosed.

EFFECT: group of inventions reduces the impact of ambient light when determining or measuring the concentration of an analyte in a sample of physiological fluid without the need to use additional equipment.

11 cl, 7 dwg