CN201072417Y - Blood lead determining instrument - Google Patents
Blood lead determining instrument Download PDFInfo
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- CN201072417Y CN201072417Y CNU200720074195XU CN200720074195U CN201072417Y CN 201072417 Y CN201072417 Y CN 201072417Y CN U200720074195X U CNU200720074195X U CN U200720074195XU CN 200720074195 U CN200720074195 U CN 200720074195U CN 201072417 Y CN201072417 Y CN 201072417Y
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Abstract
The utility model relates to a blood lead tester, comprising a control unit, a fast A/D measuring unit and an electrode unit. The utility model is characterized in that: the control unit is commonly used ordinary PC (3); the electrode is a rotating electrode driven by small engine; the fast A/D measuring unit adopts AD976 fast A/D conversion chip; an A/D measuring unit (2), an electrode unit (1) and the PC (3) are connected in sequence by USB ports. Since the blood lead tester only needs a drip of blood, the tester has the characteristics of fastness, accuracy and low cost, which not only overcome the low testing sensitivity and accuracy existed in erythrocyte protoporphyrin increasing method for measuring the blood lead of human body, but prevent the large amount of blood sampling and second time contamination problems existed in atomic absorption spectrometry method.
Description
Technical field
The utility model relates to a kind of blood testing device, especially a kind of blood lead analyzer; Belong to the medical treatment detection device class.
Background technology
Along with the high speed development of modern industry, the lead contamination in the human habitat is on the rise, and having become influences human health, especially influences an important social concern of upgrowth and development of children.Plumbous a large amount of existence in the environment cause the lasting rising of lead content in the human blood at present, and the lead in the environment is to cause saturnine basic reason.Present domestic blood lead assay method mainly contains following three kinds:
1, EP rising method can reflect the content of human body blood lead, but false negative phenomenon occur through regular meeting that the sensitivity of measurement and precision are all very low indirectly;
2, atomic absorption spectrography (AAS) is a kind of elemental microanalysis method of routine, can be used for lead content in the analytic routines sample, because plumbous atomization rate is very low, usually need 5～7 milliliters of vein blood volumes, and in the nitration treatment process, secondary pollution occurs and cause measurement result higher.
3, anodic stripping voltammetry (ASV) is a kind of electrochemical analysis method of measuring multiple metal in the various media, and the charge is small for this quasi-instrument, and volume is very little, does not need other special utility appliance, and determination step is few, and analysis time is short, and it is low to measure cost.But as medical detecting Instrument, operate still feel more loaded down with trivial details, applicable surface is also narrow.
The utility model content
The purpose of the present utility model: be intended to propose a kind of human body anodic stripping voltammetry of utilizing and carry out the instrument that blood lead is measured, the problems that existed when both having overcome existing EP rising method and aas determination human body blood lead also solve the narrower defective of complex operation, applicability that existing anodic stripping voltammetry detection method and pertinent instruments thereof exist simultaneously.
This blood lead analyzer, comprise control module, high-speed a/d measuring unit, electrode unit, it is characterized in that: described control module is ordinary PC 3 commonly used, described electrode is the rotation electrode that micro-machine drives, described high-speed a/d measuring unit adopts AD976 high-speed a/d conversion chip, and successively high-speed a/d measuring unit 2, electrode unit 1 is connected to form with PC 3 by USB interface.
Described rotation electrode unit 1 adopts by contrast electrode, to the three electrode measurement systems that electrode and working electrode are formed, and operating voltage is added on the electrode, and the current potential on the contrast electrode is the feedback input mode, and the current potential on the contrast electrode is in steady state.
Described AD976 high-speed a/d conversion chip, its switching rate can reach 100K, and conversion accuracy is 16; And employing resolution is 16 D/A conversion chip AD7535.
Described motor adopts Hall element to measure rotating speed.
This blood lead analyzer according to above technical scheme proposition; Owing to adopt combination, constitute and be specifically designed to blood lead Anodic Stripping Voltammetry Determination blood lead instrument by ordinary PC and rotation electrode, high-speed AD measuring unit.Because this blood lead analyzer only needs one to bleed, have fast, accurately, characteristics cheaply, have operation very easy, both be applicable to and detection to lead content in the blood also can be used for detection other poisonous metal.
Description of drawings
Accompanying drawing 1 is an one-piece construction synoptic diagram of the present utility model;
Accompanying drawing 3 is the design concept figure of rotation electrode;
Accompanying drawing 4 is the structure principle chart of high-speed AD data measurin system;
Accompanying drawing 5 is adopted the control interface connection diagram.
Embodiment
This blood lead analyzer as shown in the figure, comprise control module, high-speed a/d measuring unit, electrode unit, it is characterized in that: described control module is ordinary PC 3 commonly used, described electrode is the rotation electrode that micro-machine drives, described high-speed a/d measuring unit adopts AD976 high-speed a/d conversion chip, and successively high-speed a/d measuring unit 2, electrode unit 1 is connected to form with PC 3 by USB interface.
Described rotation electrode unit 1 adopts by contrast electrode, to the three electrode measurement systems that electrode and working electrode are formed, and operating voltage is added on the electrode, and the current potential on the contrast electrode is the feedback input mode, and the current potential on the contrast electrode is in steady state.
Described AD976 high-speed a/d conversion chip, its switching rate can reach 100K, and conversion accuracy is 16; And employing resolution is 16 D/A conversion chip AD7535.
Described motor adopts Hall element to measure rotating speed.
Further introduce this blood lead analyzer below in conjunction with accompanying drawing:
Electronic section
The blood lead analyzer adopts modular design as far as possible, is divided into three parts such as control module, high-speed a/d measuring unit, rotation electrode unit.Control module adopts the most frequently used ordinary PC at present, by popular USB interface control high-speed a/d DATA REASONING and rotation electrode unit, introduces the each several part function below respectively.
One, rotation electrode
For guarantee the electrode plated film evenly, and electric field stable in the solution need be designed to rotation electrode with working electrode, and guarantee stablizing of rotation electrode itself.Drive the working electrode rotation with micro-machine, with brush electrode wires is drawn then.Motor adopts Hall element to measure rotating speed, and rotating speed is converted into electric pulse, controls rotating speed of motor thus, theory diagram such as Fig. 1.
Two, high-speed AD measuring unit
The high-speed AD measuring unit comprises three parts, and 1, electrode system, 2, the high-speed AD data measurin system, 3, the USB communication interface.
1, this blood lead analyser adopts three electrode measurement systems, promptly contrast electrode, to electrode, working electrode.Its basic demand is: no matter how the internal resistance and the electrode internal resistance of solution change, be added in contrast electrode and the voltage above the working electrode and will keep constant, this just requires can not pass through electric current above the contrast electrode, otherwise the electrode internal resistance will influence alive accuracy of institute and stability, adopt the theory diagram of Fig. 2 for this reason.Among the figure, voltage is added on the electrode, and the current potential on the contrast electrode is as the feedback input, thereby control makes the current potential on the contrast electrode keep constant to the voltage on the electrode.
2, the actual dissolution time of high-speed a/d data measurin system blood lead is quite short, requires the A/D sampling to have higher speed and precision, adopts AD976 high-speed a/d conversion chip for this reason, and its switching rate can reach 100K, and conversion accuracy is 16.In addition, in order to guarantee to be added in the stable of voltage on the electrode, having adopted resolution is 16 D/A conversion chip AD7535, and theory diagram is seen Fig. 3.Among the figure, in order to improve the sample rate of system, system moves thereby realize respectively forming member by the combination of simple logic door.
3, work such as all controls of this instrument of USB communication interface, computing, analysis all have the host computer PC to finish, and need the timely transmission that communication interface at a high speed guarantees data for this reason.We adopt popular usb mode at present, and bottom Single-chip Controlling USB communication interface is finished the communication of high-speed data, satisfies appliance requires.Fig. 5 is the schematic block diagram that adopts this kind mode interface.
Claims (4)
1. blood lead analyzer, comprise control module, high-speed a/d measuring unit, electrode unit, it is characterized in that: described control module is ordinary PC (3) commonly used, described electrode is the rotation electrode that micro-machine drives, described high-speed a/d measuring unit adopts AD976 high-speed a/d conversion chip, and successively high-speed a/d measuring unit (2), electrode unit (1) is connected to form with PC (3) by USB interface.
2. blood lead analyzer as claimed in claim 1, it is characterized in that: described rotation electrode unit (1) adopts the three electrode measurement systems that form by contrast electrode, to electrode and working electrode, operating voltage is added on the electrode, current potential on the contrast electrode is the feedback input mode, and the current potential on the contrast electrode is in steady state.
3. blood lead analyzer as claimed in claim 1 is characterized in that: described AD976 high-speed a/d conversion chip, and its switching rate can reach 100K, and conversion accuracy is 16; And employing resolution is 16 D/A conversion chip AD7535.
4. blood lead analyzer as claimed in claim 1 is characterized in that: described motor adopts Hall element to measure rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720074195XU CN201072417Y (en) | 2007-08-29 | 2007-08-29 | Blood lead determining instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720074195XU CN201072417Y (en) | 2007-08-29 | 2007-08-29 | Blood lead determining instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201072417Y true CN201072417Y (en) | 2008-06-11 |
Family
ID=39550974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720074195XU Expired - Fee Related CN201072417Y (en) | 2007-08-29 | 2007-08-29 | Blood lead determining instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201072417Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323322A (en) * | 2011-05-18 | 2012-01-18 | 齐齐哈尔医学院 | Serial electrolytic cell stripping analysis blood lead measuring device |
| CN104422721A (en) * | 2013-09-06 | 2015-03-18 | 波音公司 | Device and method for determining fluid streaming potential |
| CN103808949B (en) * | 2014-03-02 | 2015-08-26 | 济南齐力光电技术有限公司 | A kind of Fully-automatic production line type trace element detector |
-
2007
- 2007-08-29 CN CNU200720074195XU patent/CN201072417Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323322A (en) * | 2011-05-18 | 2012-01-18 | 齐齐哈尔医学院 | Serial electrolytic cell stripping analysis blood lead measuring device |
| CN102323322B (en) * | 2011-05-18 | 2013-06-26 | 齐齐哈尔医学院 | Serial electrolytic cell stripping analysis blood lead measuring device |
| CN104422721A (en) * | 2013-09-06 | 2015-03-18 | 波音公司 | Device and method for determining fluid streaming potential |
| CN104422721B (en) * | 2013-09-06 | 2019-01-22 | 波音公司 | Device and method for determining fluid streaming potential |
| CN103808949B (en) * | 2014-03-02 | 2015-08-26 | 济南齐力光电技术有限公司 | A kind of Fully-automatic production line type trace element detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080611 Termination date: 20110829 |