CN2890919Y

CN2890919Y - Cylindrical body fluid glucose electrochemical sensor

Info

Publication number: CN2890919Y
Application number: CN 200620110322
Authority: CN
Inventors: 蒲晓允; 王华忠; 左世友; 刘琳琳
Original assignee: Second Affiliated Hospital of TMMU
Current assignee: Third Military Medical University TMMU; Second Affiliated Hospital of TMMU
Priority date: 2006-04-11
Filing date: 2006-04-11
Publication date: 2007-04-18
Anticipated expiration: 2016-04-11

Abstract

A column body fluid dextrose electrochemistry sensor comprises a column shell and a column core, wherein the core comprises a water absorption layer, an anti-vitamin C interference layer and a filtration layer from top to bottom, and two symmetrical silk screen printing electrodes are equipped on the surface of the shell 2. The utility model has a wide range of body fluid samples and can detect the dextrose density of other body fluid samples such as urine and saliva except for blood samples with high anti-interference capacity which can eliminate the interference of visible elements in the body fluid samples and the interference of electroactive substance vitamin C through the anti-vitamin C interference layer. The amount of the needed body fluid sample is small and invariable, which makes the detecting results more stable and the detecting data more reliable.

Description

Cylindrical body fluid electrochemical glucose sensor

One, technical field

The utility model belongs to what medical diagnosis measuring instrument, particularly a kind of sensing element of body fluid glucose detection instrument.

Two, background technology

In the prior art, usually adopt blood-sugar detecting instrument to measure glucose content in the blood of human body, its employed glucose sensing parts is a kind of long and narrow vanes, and it is applicable to the finger blood specimen usually, and also can't eliminate fully the interference that various complicated ingredients in the blood bring; To other humoral specimen, for example urine, saliva etc., sampling or application of sample are all very inconvenient; In addition, the ribbon structure of vane also can't guarantee the consistance of sampling quantity; Therefore, existing vane interference free performance is poor, and it is little to be suitable for the humoral specimen scope, and testing result is stable inadequately.

Three, summary of the invention

The purpose of this utility model just is to design a kind of cylindrical body fluid electrochemical glucose sensor that is different from the existing product structure at the defective of prior art existence, makes it good in anti-interference performance, is suitable for the humoral specimen wide ranges, and testing result is stable.

Goal of the invention of the present utility model is achieved through the following technical solutions.

A kind of cylindrical body fluid electrochemical glucose sensor is characterized in that:

1) be made of cylindrical housing and cylinder core, inner core is made up of water accepting layer, antivitamin C interfere with layer and filtering layer three-decker from top to bottom;

2) shell and inner core fit, the surface is provided with the screen printing electrode of two symmetries in the enclosure, the electrode tips of two electrodes is higher than the water accepting layer upper surface of inner core, one of them electrode tips links to each other with working electrode by conductive silver wire, another electrode tips links to each other with the Ag/AgCl contrast electrode by conductive silver wire, and working electrode and Ag/AgCl contrast electrode are positioned at the above inner surface of outer cover in antivitamin C interfere with layer upper surface.

Cylindrical body fluid electrochemical glucose sensor of the present utility model, said water accepting layer is fiberglass products preferably; Said shell is the polyvinyl chloride plastic film goods preferably.

The cylindrical body fluid electrochemical glucose sensor of the utility model structure, be suitable for the humoral specimen wide ranges, also can detect except that the blood sample as the concentration of glucose in other humoral specimens such as urine, saliva, this state of illness monitoring to the diabetic is significant; Its antijamming capability height not only can be got rid of the interference of visible component in the humoral specimen (as haemocyte, arena etc.), and can get rid of the ascorbic interference of electroactive material by the antivitamin C interfere with layer that is fixed with ascorbic acid oxidase; Its required humoral specimen amount is less and more constant, makes testing result more stable, and it is more reliable to detect data.

Four, description of drawings

Fig. 1 is the local structural representation that launches of the cylindrical body fluid electrochemical glucose sensor of the utility model;

Fig. 2 is the shell deployed configuration synoptic diagram of the cylindrical body fluid electrochemical glucose sensor of the utility model;

Among the figure: 1-electrode tips, 2-shell, 3-conductive silver wire, 4-working electrode, 5-Ag/AgCl contrast electrode, 6-water accepting layer, 7-antivitamin C interfere with layer, 8-filtering layer.

Five, embodiment

Further specify concrete structure of the present utility model and its principle of work below in conjunction with accompanying drawing.

1) be made of cylindrical housing 2 and cylinder core, inner core is made up of water accepting layer 6, antivitamin C interfere with layer 7 and filtering layer 8 three-deckers from top to bottom;

2) shell 2 fits with inner core, be provided with the screen printing electrode of two symmetries at shell 2 inside surfaces, the electrode tips 1 of two electrodes is higher than water accepting layer 6 upper surfaces of inner core, one of them electrode tips 1 links to each other with working electrode 4 by conductive silver wire 3, another electrode tips 1 links to each other with Ag/AgCl contrast electrode 5 by conductive silver wire 3, and working electrode 4 and Ag/AgCl contrast electrode 5 are positioned at above shell 2 inside surfaces in antivitamin C interfere with layer 7 upper surfaces.

Water accepting layer 6 is fiberglass productses; Shell 2 is polyvinyl chloride plastic film goods.

Its principle of work is as follows:

The cylindrical body fluid electrochemical glucose sensor of the utility model structure, the lower surface of its filtering layer 8 is the draw body fluid sample directly, filtering layer 8 can the filtering visible component interference, antivitamin C interfere with layer 7 can be removed the ascorbic interference of electroactive material, humoral sample continues to go upward to evenly distribution in the water accepting layer 6, and directly contact with two electrodes, glucose oxidase enzyme reaction on wherein contained glucose and the working electrode 4 and cause the variation of current potential, two electrode tips 1 by shell 2 upper end inside surfaces link to each other with body fluid glucose detection instrument, record concentration of glucose in the humoral specimen by the variation of measuring electric current.

Claims

1, a kind of cylindrical body fluid electrochemical glucose sensor is characterized in that:

1) be made of cylindrical housing (2) and cylinder core, inner core is made up of water accepting layer (6), antivitamin C interfere with layer (7) and filtering layer (8) three-decker from top to bottom;

2) shell (2) fits with inner core, be provided with the screen printing electrode of two symmetries at shell (2) inside surface, the electrode tips of two electrodes (1) is higher than water accepting layer (6) upper surface of inner core, one of them electrode tips (1) links to each other with working electrode (4) by conductive silver wire (3), another electrode tips (1) links to each other with Ag/AgCl contrast electrode (5) by conductive silver wire (3), and working electrode (4) and Ag/AgCl contrast electrode (5) are positioned at above shell (2) inside surface in antivitamin C interfere with layer (7) upper surface.

2, according to the described cylindrical body fluid electrochemical glucose sensor of claim 1, it is characterized in that said water accepting layer (6) is a fiberglass products.

3, according to claim 1 or 2 described cylindrical body fluid electrochemical glucose sensors, it is characterized in that said shell (2) is the polyvinyl chloride plastic film goods.