CN103439455B - Blending device used in direct titration detection method - Google Patents
Blending device used in direct titration detection method Download PDFInfo
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- CN103439455B CN103439455B CN201310441764.XA CN201310441764A CN103439455B CN 103439455 B CN103439455 B CN 103439455B CN 201310441764 A CN201310441764 A CN 201310441764A CN 103439455 B CN103439455 B CN 103439455B
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Abstract
The invention discloses a blending device used in a direct titration detection method. The blending device comprises a leading-in pole and at least a pipe body, wherein the pipe bodies are fixed at the lower end of the leading-in pole and are provided with inner cavities; openings are formed at the two ends of each pipe body and are communicated with the inner cavity; during detection, the pipe bodies are soaked in reaction liquid. The blending device has the advantages that since the pipe bodies with the inner cavities and the openings are soaked in the reaction liquid, and when boiling, the reaction liquid can quickly generate uniform bubbles via the pipe bodies so as to be quickly mixed with the titrating liquid uniformly, thus improving the accuracy and stability of the detection results.
Description
Technical field
The present invention relates to checkout equipment, be specifically related to a kind of evenly mixing device for direct titration detection method.
Background technology
Current direct titrimetric method, for detecting total reducing sugar in food and reducing sugar, is the prefered method that arbitration inspection adopts.Direct titrimetric method carries out titration under boiling condition, principle is that reducing sugar and Kocide SD generate copper oxidule precipitation through redox reaction under boiling condition, reducing sugar excessive during titration end-point and indicator time methylene blue generation redox reaction, the color of titration end-point is that time methylene blue becomes colourless by blueness, and titration system solution becomes brick-red or peony from blueness.
The testing conditions of direct titrimetric method is harsher, during proximal response terminal require rate of titration be every 2 seconds 1, i.e. 0.025 milliliters/second, because the principle of this reaction belongs to redox reaction, for avoiding introducing air impact reaction end due to vibration, can not vibrate or shake reagent bottle in titration process reaction system is mixed fast.The bubble produced by bubble and the zeolite of reaction system boiling generation completely due to the mixed process of reaction solution cannot make reactant liquor even, thus cause vs can not spread fast, uniformly in reactant liquor, namely reactant liquor and vs cannot mix fast, this causes drop reaction not complete instantaneously, there is 5-10 reactant liquor in second mixing time, then cause during titration operation repetitive and cannot judge titration end-point under identical conditions, and make the collimation of titration results poor.Due to above reason, the operation of staff in real work detecting total reducing sugar can be greatly affected, and result Stability and veracity has certain deviation.
Summary of the invention
The object of the invention is the deficiency existed to overcome above prior art, providing a kind of structure simple, reactant liquor can be mixed fast, improving the evenly mixing device for direct titration detection method of accuracy in detection and stability.
Object of the present invention is realized by following technical scheme: this is used for the evenly mixing device of direct titration detection method, comprise leading-in pole and at least one body, described body is fixed on the lower end of leading-in pole, described body is provided with inner chamber, the two ends of described body are provided with opening, described opening and intracavity inter-connection; When detecting, described body is soaked in reactant liquor.Concrete, when body immerses reactant liquor (normal temperature), because cavity internal memory has air, pressure is an atmospheric pressure, the liquid pressure that reactant liquor is formed is little compared with atmospheric pressure, and reactant liquor has larger surface tension at opening part, this can be avoided reactant liquor to enter the inner chamber of body, then the air in the inner chamber of body can not get the gate.And when reactant liquor is heated to boiling, air heats in body expands and effuser is external and form stable gasification center (also known as boiling center) thus generate bubble, opening then at body two ends is formed and makes reaction system form fine and smooth and uniform bubble fast, mixes reactant liquor fast.
The quantity of described body is 4, and described body is one group with 2, and described 2 bodys often organized are arranged in horizontal direction parallel, and described two groups of bodys divide the two-layer lower end being fixed on leading-in pole by vertical direction.The quantity of described body can determine according to actual conditions, as can according to the volume of reactant liquor.
The described evenly mixing device for direct titration detection method also comprises two connecting links, and the lower end of leading-in pole is fixed at the middle part of described two connecting links, and described 4 bodys are individually fixed in the two ends of two connecting links; Described two connecting links are vertically arranged, and described two connecting links are all vertical with leading-in pole.
The quantity of described body is 2, and described 2 bodys are arranged in horizontal direction parallel, and described 2 bodys are all fixed on the lower end of leading-in pole.
The described evenly mixing device for direct titration detection method also comprises a connecting link, and the lower end of leading-in pole is fixed at the middle part of described connecting link, and described 2 bodys are individually fixed in the two ends of connecting link.
The two ends of described body are shuttle-type.This structure can make the air in body at the uniform velocity flow out body, thus the bubble making reactant liquor produce is even, fine and smooth, improves the degree of mixedness of reactant liquor.
Preferred as one, the diameter in the middle part of described body is 4mm ~ 10mm; The aperture of described opening is 0.5mm ~ 4mm.
For convenience of fixing, the upper end of described leading-in pole is provided with bend, and described bend is hook-shaped.The upper end of leading-in pole has in hook-shaped bend, then this bend can be hung on the upper end of the container bottle that reactant liquor is housed.
Preferred as one, the diameter of described leading-in pole is 0.4mm ~ 0.6mm.
The material of described leading-in pole and body is glass.Glass material has high temperature resistant, resistance to chemical attack characteristic.Even if then this is used for evenly mixing device of direct titration detection method in alkaline solution, and under boiling condition, can not being corroded and damaging of leading-in pole and body.Which increase originally for the serviceable life of the evenly mixing device of direct titration detection method.Meanwhile, glass or can not be heated and chemical reaction occurs because of alkalescence, and namely can not detect because of highly basic or other materials of generation impact of being heated, this also ensures the accuracy detected.
Principle of work of the present invention: leading-in pole inserts with body and is equipped with in the container bottle of reactant liquor, and the body that makes reactant liquor soak.In testing process, when reactant liquor is heated to boiling, tube cavity is heated, then the air of tube cavity flows out and enters reactant liquor in body, and form stable gasification center (also known as boiling center) thus generate bubble, opening then at body two ends is formed and makes reaction system form fine and smooth and uniform bubble fast, thus makes reactant liquor and vs mix fast.This will ensure that reactant liquor all can meet the requirement of examination criteria in the repeatability of reaction end and precision, thus improves the Stability and veracity detected.
The present invention has following advantage relative to prior art:
(1) this evenly mixing device being used for direct titration detection method immerses reactant liquor by the body being provided with opening at two ends, in testing process, when reactant liquor seethes with excitement, body can make reactant liquor produce fine and smooth and uniform bubble fast, thus reactant liquor and vs rapid mixing can be made evenly, improve the accurate end and the stability of testing result.
(2) this be used for the evenly mixing device rapidoprint expense of direct titration detection method low, make simple and quick, can produce in batches.
(3) this is used for evenly mixing device of direct titration detection method and is manufactured by glass material, thus has high temperature resistant, resistance to chemical attack, therefore can use under alkaline solution environment, even and if reactant liquor is fluidized state, also can ensure to detect proceeding of test.The simultaneously body easy to clean that manufactures of glass material, can Reusability, and also can not impact testing result when reusing.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of evenly mixing device for direct titration detection method of the present embodiment 1.
Fig. 2 is the structural representation of a kind of evenly mixing device for direct titration detection method of the present embodiment 2.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
A kind of evenly mixing device for direct titration detection method as shown in Figure 1, comprise leading-in pole 1 and at least one body 2, described body 2 is fixed on the lower end of leading-in pole 1, and described body 2 is provided with inner chamber, the two ends of described body are provided with opening 21, described opening 21 and intracavity inter-connection; When detecting, described body 2 is soaked in reactant liquor.Concrete, when body 2 immerses reactant liquor, because opening 21 is little, then reactant liquor has larger tension force at opening 21 place, and this can be avoided reactant liquor to enter the inner chamber of body 2, then the air in the inner chamber of body 2 can not get the gate.And when reactant liquor is heated to boiling, air heats in body 2 expands and flows out body 2, and form stable gasification center (also known as boiling center) thus generate bubble, opening then at body two ends is formed and makes reaction system form fine and smooth and uniform bubble fast, mixes reactant liquor fast.
The quantity of described body 2 is 4, and described body 2 is one group with 2, and described 2 bodys 2 often organized are arranged in horizontal direction parallel, and described two groups of bodys 2 divide the two-layer lower end being fixed on leading-in pole 1 by vertical direction.
The described evenly mixing device for direct titration detection method also comprises two connecting links 3, and the lower end of leading-in pole 1 is fixed at the middle part of described two connecting links 3, and described 4 bodys 2 are individually fixed in the two ends of two connecting links 3; Described two connecting links 3 are vertically arranged, and described two connecting links 3 are all vertical with leading-in pole 1.Meanwhile, two connecting links 3 are orthogonal in solid space.
The two ends of described body 2 are shuttle-type.This structure can make the air in body 2 at the uniform velocity flow out body, and form stable gasification center (also known as boiling center) thus generate bubble, opening then at body two ends is formed and makes reaction system form fine and smooth and uniform bubble fast, thus improves the degree of mixedness of reactant liquor.
For convenience of fixing, the upper end of described leading-in pole 1 is provided with bend 11, and described bend 11 is in hook-shaped.The upper end of leading-in pole 1 has in hook-shaped bend 11, then this bend 11 can be hung on the upper end of the container bottle that reactant liquor is housed.For more convenient fixing, the angle of bend of bend is right angle.
Preferred as one, the diameter of described leading-in pole 1 is 0.4mm ~ 0.6mm.
Preferred as one, the diameter in the middle part of described body 2 is 4mm ~ 10mm.
The material of described leading-in pole 1 and body 2 is glass.Glass material has high temperature resistant, resistance to chemical attack characteristic.
When using titrimetry to carry out test experience, select the diameter of leading-in pole 1 to be 0.5mm, length 135mm, the aperture of opening is 1.5mm, and body 2 mid diameter is 5mm, and the pipe thickness of body 2 is 1mm; Distance between body 2 and leading-in pole 1 is 2mm; Body 2 is divided into upper and lower two rows, and the body 2 of upper and lower two rows is orthogonal, and meanwhile, the distance of body 2 vertical direction of upper and lower two rows is 8mm.
When testing, use 5.0mL Fehling I liquid and 5.0mL Fehling II liquid, be placed in 250mL conical flask, add water 50mL, thus forming reactions liquid; Again body 2 is soaked in reactant liquor, adds 19 ~ 20mL Glucose standards solution in advance from buret, reactant liquor is heated to boiling, and keeps 2min, add 2 methylene blue indicator solutions; In 1min, terminal (blue disappearance) is titrated to Glucose standards solution under fluidized state, until solution blueness is just taken off for terminal, the cumulative volume of record consumption of glucose standard solution, operation repetitive 9 times.
By above-mentioned steps, detect obtain using the experimental data of evenly mixing device and do not use this not evenly mixing device time experimental data and compare use the calculating data of evenly mixing device and do not use originally not evenly mixing device time calculating data respectively as table 1 and table 2:
Table 1 Fehling's reagent is demarcated and is consumed volume result
| Experiment number | Do not add evenly mixing device and consume volume (mL) | Add evenly mixing device and consume volume (mL) |
| 1 | 20.71 | 20.72 |
| 2 | 20.61 | 20.61 |
| 3 | 20.82 | 20.67 |
| 4 | 20.85 | 20.69 |
| 5 | 20.92 | 20.70 |
| 6 | 20.76 | 20.63 |
| 7 | 20.78 | 20.65 |
| 8 | 20.74 | 20.71 |
| 9 | 20.75 | 20.66 |
Table 2
| Do not add foam device | Add foam device | |
| Mean value (mL) | 20.769 | 20.671 |
| Variance | 0.00744 | 0.00139 |
| Observed reading | 9 | 9 |
| df | 8 | 8 |
| F | 5.352 | |
| The mono-tail of P | 0.0286 | |
| The mono-tail of F is critical | 3.18 |
Wherein, the df in table 2 represents degree of freedom, and F represents the ratio do not added between the variance of foam device and the variance adding foam device, and P represents probability.From the data in table 1 and table 2, add the variance of foamed sheet much smaller than the variance not adding foamed sheet, this represents that the collimation, stability and the accuracy that add testing result after foamed sheet are high.And the F=5.352 in table 2, it is 3.18 that its numerical value is greater than the mono-tail critical value of F, and this illustrates that the result precision not adding foamed sheet and the precision adding foamed sheet have significant difference, and the precision namely adding foamed sheet is higher.
Embodiment 2
This is used for evenly mixing device of direct titration detection method except following technical characteristic except with embodiment 1: the quantity of described body 2 is 2, and described 2 bodys 2 are in horizontal direction parallel setting, and described 2 bodys 2 are all fixed on the lower end of leading-in pole 1.
The described evenly mixing device for direct titration detection method also comprises a connecting link 3, and the lower end of leading-in pole 1 is fixed at the middle part of described connecting link 3, and described 2 bodys 2 are individually fixed in the two ends of connecting link 3.
Above-mentioned embodiment is the preferred embodiments of the present invention, can not limit the present invention, and any of other does not deviate from technical scheme of the present invention and the substitute mode of the change made or other equivalence, is included within protection scope of the present invention.
Claims (10)
1. the evenly mixing device for direct titration detection method, it is characterized in that: comprise leading-in pole and at least one body, described body is fixed on the lower end of leading-in pole, and described body is provided with inner chamber, the two ends of described body are provided with opening, described opening and intracavity inter-connection; When detecting, described body is soaked in reactant liquor.
2. a kind of evenly mixing device for direct titration detection method according to claim 1, it is characterized in that: the quantity of described body is 4, described body is one group with 2, described 2 bodys often organized are arranged in horizontal direction parallel, and described two groups of bodys divide the two-layer lower end being fixed on leading-in pole by vertical direction.
3. a kind of evenly mixing device for direct titration detection method according to claim 2, it is characterized in that: also comprise two connecting links, the lower end of leading-in pole is fixed at the middle part of described two connecting links, and described 4 bodys are individually fixed in the two ends of two connecting links; Described two connecting links are vertically arranged, and described two connecting links are all vertical with leading-in pole.
4. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the quantity of described body is 2, and described 2 bodys are arranged in horizontal direction parallel, and described 2 bodys are all fixed on the lower end of leading-in pole.
5. a kind of evenly mixing device for direct titration detection method according to claim 4, it is characterized in that: also comprise a connecting link, the lower end of leading-in pole is fixed at the middle part of described connecting link, and described 2 bodys are individually fixed in the two ends of connecting link.
6. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the two ends of described body are shuttle-type.
7. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the diameter in the middle part of described body is 4mm ~ 10mm; The aperture of described opening is 0.5mm ~ 4mm.
8. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the diameter of described leading-in pole is 0.4mm ~ 0.6mm.
9. a kind of evenly mixing device for direct titration detection method according to claim 1, it is characterized in that: the upper end of described leading-in pole is provided with bend, described bend is hook-shaped.
10. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the material of described leading-in pole and body is glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310441764.XA CN103439455B (en) | 2013-09-25 | 2013-09-25 | Blending device used in direct titration detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310441764.XA CN103439455B (en) | 2013-09-25 | 2013-09-25 | Blending device used in direct titration detection method |
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| CN103439455B true CN103439455B (en) | 2015-04-22 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2689224Y (en) * | 2004-03-04 | 2005-03-30 | 山东省科学院中日友好生物技术研究中心 | Automatic titrating device for detecting reduced sugar |
| DE102006030056B3 (en) * | 2006-06-29 | 2007-06-21 | Ika - Werke Gmbh & Co. Kg | Microtiter plate comprises wells with deformable bases and stirrer rods that are connected to or pass through the well bases and comprise an outer section in contact with a drive unit |
| CN201984037U (en) * | 2011-02-28 | 2011-09-21 | 南京财经大学 | Titration end-point determination device for determining fatty acid value in grain |
| CN103293152A (en) * | 2013-06-25 | 2013-09-11 | 长沙理工大学 | A method and an apparatus for end point detection in titration analysis |
| CN203465205U (en) * | 2013-09-25 | 2014-03-05 | 广州市酒类检测中心 | Uniform mixing device for direct titration detection method |
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