CN103439455A - Blending device used in direct titration detection method - Google Patents
Blending device used in direct titration detection method Download PDFInfo
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- CN103439455A CN103439455A CN201310441764XA CN201310441764A CN103439455A CN 103439455 A CN103439455 A CN 103439455A CN 201310441764X A CN201310441764X A CN 201310441764XA CN 201310441764 A CN201310441764 A CN 201310441764A CN 103439455 A CN103439455 A CN 103439455A
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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 the direct titration detection method.
Background technology
Direct titrimetric method, for detection of the total reducing sugar in food and reducing sugar, is the prefered method that arbitration inspection adopts at present.Direct titrimetric method is to carry out titration under the boiling condition, principle is that reducing sugar and Kocide SD generate copper oxidule precipitation through redox reaction under the boiling condition, excessive reducing sugar and indicator time methylene blue generation redox reaction during titration end-point, it is colourless that the color of titration end-point is that time methylene blue is become by blueness, and the titration system solution becomes brick-red or peony from blueness.
The testing conditions of direct titrimetric method is harsher, during the 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 because the air impact reaction end is introduced in vibration, can not vibrate or shake reagent bottle in titration process reaction system is mixed fast.The bubble produced due to the mixed process of the reaction solution bubble that boiling produces by reaction system fully and zeolite can't make reactant liquor even, thereby cause vs can not be fast in reactant liquor, diffusion uniformly, be that reactant liquor and vs can't mix fast, this causes drop reaction not complete moment, 5-10 reactant liquor in second mixing time appears, can't be in the identical conditions titration end-point that judges while causing the titration operation repetitive, and make the collimation of titration results poor.Due to above reason, the operation of staff in real work that detects total reducing sugar can be greatly affected, and Stability and veracity has certain deviation as a result.
Summary of the invention
The objective of the invention is the deficiency existed in order to overcome above prior art, provide a kind of simple in structure, can mix fast reactant liquor, improve the evenly mixing device for the direct titration detection method of accuracy in detection and stability.
Purpose of the present invention realizes by following technical scheme: this is for the evenly mixing device of direct titration detection method, comprise leading-in pole and at least one body, described body is fixed in 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 being detected, described body is soaked in reactant liquor.Concrete, when body immerses reactant liquor (normal temperature), because the cavity internal memory has air, pressure is an atmospheric pressure, the liquid pressure that reactant liquor forms is compared little 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, and the air in the inner chamber of body can not get the gate.And when reactant liquor is heated to boiling, air expanded by heating in body and effuser external and form stable gasification center (claiming the boiling center) thus generate bubble, the opening at the body two ends forms and makes reaction system form fast fine and smooth and uniform bubble, mixes fast reactant liquor.
The quantity of described body is 4, and described body be take 2 as one group, and 2 bodys of described every group are in the horizontal direction parallel setting, and described two groups of bodys divide the two-layer lower end of being fixed in leading-in pole by vertical direction.The quantity of described body can determine according to actual conditions, as can be according to the volume of reactant liquor.
The described evenly mixing device for the 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 vertically arrange, and described two connecting links are all vertical with leading-in pole.
The quantity of described body is 2, and described 2 bodys are in the horizontal direction parallel setting, and described 2 bodys all are fixed in the lower end of leading-in pole.
The described evenly mixing device for the 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 the shuttle type.This structure can make the air in body at the uniform velocity flow out body, thereby the bubble that makes reactant liquor produce is even, fine and smooth, improves the degree of mixedness of reactant liquor.
As a kind of preferred, the diameter at described body middle part 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 the bend that is hook-shaped, and this bend can be hung on the upper end of the container bottle that reactant liquor is housed.
As a kind of preferred, the diameter of described leading-in pole is 0.4mm～0.6mm.
The material of described leading-in pole and body is glass.High temperature resistant, resistance to chemical attack characteristic that glass material has.Even this for evenly mixing device of direct titration detection method at alkaline solution, and under the boiling condition, can not being corroded and damaging of leading-in pole and body.This has improved this serviceable life for the evenly mixing device of direct titration detection method.Simultaneously, glass can or not be heated because of alkalescence chemical reaction occurs, and can or not be heated because of highly basic and produce other material impact detections, and this also guarantees the accuracy detected.
Principle of work of the present invention: leading-in pole inserts and is equipped with in the container bottle of reactant liquor with body, and makes reactant liquor soak body.In testing process, when reactant liquor is heated to boiling, tube cavity is heated, the air of tube cavity flows out and enters reactant liquor in body, and form stable gasification center (claiming again the boiling center) thereby the generation bubble, the opening at the body two ends forms and makes reaction system form fast fine and smooth and uniform bubble, thereby makes reactant liquor and vs mix fast.This will guarantee that reactant liquor all can meet the requirement of examination criteria in repeatability and the precision of reaction end, thereby improve the Stability and veracity detected.
The present invention has advantages of as follows with respect to prior art:
(1) this evenly mixing device for the direct titration detection method immerses reactant liquor by the body that is provided with opening at two ends, in testing process, when reactant liquor seethes with excitement, body can make reactant liquor produce fast fine and smooth and uniform bubble, thereby can make reactant liquor and vs rapid mixing even, improve the accurate end and the stability of testing result.
(2) this is low for evenly mixing device rapidoprint expense of direct titration detection method, make Simple fast, can produce in batches.
(3) this for evenly mixing device of direct titration detection method by the glass material manufacture, thereby there is high temperature resistant, resistance to chemical attack, therefore can under the alkaline solution environment, use, even and reactant liquor be fluidized state, also can guarantee to detect proceeding of test.The body easy to clean that simultaneously glass material is manufactured, but Reusability, and also can not impact testing result while reusing.
The accompanying drawing explanation
Fig. 1 is the structural representation of a kind of evenly mixing device for the direct titration detection method of the present embodiment 1.
Fig. 2 is the structural representation of a kind of evenly mixing device for the 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 the 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 in 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 being detected, described body 2 is soaked in reactant liquor.Concrete, when body 2 immerses reactant liquor, because opening 21 is little, reactant liquor has larger tension force at opening 21 places, and this can be avoided reactant liquor to enter the inner chamber of body 2, and the air in the inner chamber of body 2 can not get the gate.And when reactant liquor is heated to boiling, air expanded by heating in body 2 and flow out body 2, and form stable gasification center (claiming again the boiling center) thereby the generation bubble, the opening at the body two ends forms and makes reaction system form fast fine and smooth and uniform bubble, mixes fast reactant liquor.
The quantity of described body 2 is 4, and described body 2 be take 2 as one group, and 2 bodys 2 of described every group are in the horizontal direction parallel setting, and described two groups of bodys 2 divide the two-layer lower end of being fixed in leading-in pole 1 by vertical direction.
The described evenly mixing device for the 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 vertically arrange, and described two connecting links 3 are all vertical with leading-in pole 1.Simultaneously, two connecting links 3 are orthogonal in solid space.
The two ends of described body 2 are the shuttle type.This structure can make the air in body 2 at the uniform velocity flow out body, and form stable gasification center (claiming again the boiling center) thereby the generation bubble, the opening at the body two ends forms and makes reaction system form fast fine and smooth and uniform bubble, thereby 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 hook-shaped.The upper end of leading-in pole 1 has the bend 11 that is hook-shaped, and 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.
As a kind of preferred, the diameter of described leading-in pole 1 is 0.4mm～0.6mm.
As a kind of preferred, the diameter at described body 2 middle parts is 4mm～10mm.
The material of described leading-in pole 1 and body 2 is glass.High temperature resistant, resistance to chemical attack characteristic that glass material has.
When using titrimetry to carry out test experience, the diameter of selecting leading-in pole 1 is 0.5mm, length 135mm, and the aperture of opening is 1.5mm, and body 2 middle part diameters are 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 upper and lower two rows' body 2 is orthogonal, and simultaneously, the distance of upper and lower two rows' body 2 vertical direction is 8mm.
While being tested, use 5.0mL Fehling I liquid and 5.0mL Fehling II liquid, be placed in the 250mL conical flask, add water 50mL, thereby form reactant liquor; Again body 2 is soaked in reactant liquor, from buret, adds in advance 19～20mL glucose standard solution, reactant liquor is heated to boiling, and keep 2min, add 2 methylene blue indicator solutions; Be titrated to terminal (the blue disappearance) with the glucose standard solution in 1min under fluidized state, until the solution blueness is just taken off for terminal, record the cumulative volume of consumption of glucose standard solution, operation repetitive 9 times.
By above-mentioned steps, detect obtain the using experimental data of evenly mixing device and do not use this not experimental data during evenly mixing device and the computational data when comparing the computational data that uses evenly mixing device and not using an evenly mixing device not respectively as table 1 and table 2:
Table 1 Fehlings reagent is demarcated and is consumed the volume result
| Experiment number | Do not add evenly mixing device and consume volume (mL) | Add evenly mixing device to 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 means degree of freedom, and F representative does not add the variance of foam device and adds the ratio between the variance of foam device, and P means probability.Data in table 1 and table 2 are known, add the variance of foamed sheet much smaller than the variance that does not add foamed sheet, and this expression adds after foamed sheet collimation, stability and the accuracy of testing result 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, this explanation does not add the precision as a result of foamed sheet and adds the precision of foamed sheet to have significant difference, adds the precision of foamed sheet higher.
Embodiment 2
This for evenly mixing device of direct titration detection method except following technical characterictic with embodiment 1: the quantity of described body 2 is 2, and described 2 bodys 2 are in the horizontal direction parallel setting, and described 2 bodys 2 all are fixed in the lower end of leading-in pole 1.
The described evenly mixing device for the 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 be limited the present invention, and other any change or other equivalent substitute mode that does not deviate from technical scheme of the present invention and make, within being included in protection scope of the present invention.
Claims (10)
1. the evenly mixing device for the direct titration detection method, it is characterized in that: comprise leading-in pole and at least one body, described body is fixed in 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 being detected, described body is soaked in reactant liquor.
2. a kind of evenly mixing device for the direct titration detection method according to claim 1, it is characterized in that: the quantity of described body is 4, described body be take 2 as one group, 2 bodys of described every group are in the horizontal direction parallel setting, and described two groups of bodys divide the two-layer lower end of being fixed in leading-in pole by vertical direction.
3. a kind of evenly mixing device for the direct titration detection method according to claim 1, 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 vertically arrange, and described two connecting links are all vertical with leading-in pole.
4. a kind of evenly mixing device for the direct titration detection method according to claim 1, it is characterized in that: the quantity of described body is 2, and described 2 bodys are in the horizontal direction parallel setting, and described 2 bodys all are fixed in the lower end of leading-in pole.
5. a kind of evenly mixing device for the direct titration detection method according to claim 1, 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 the direct titration detection method according to claim 1, it is characterized in that: the two ends of described body are the shuttle type.
7. a kind of evenly mixing device for the direct titration detection method according to claim 1 is characterized in that: the diameter at described body middle part is 4mm～10mm; The aperture of described opening is 0.5mm～4mm.
8. a kind of evenly mixing device for the direct titration detection method according to claim 1, it is characterized in that: the diameter of described leading-in pole is 0.4mm～0.6mm.
9. a kind of evenly mixing device for the 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, and described bend is hook-shaped.
10. a kind of evenly mixing device for the direct titration detection method according to claim 1, it is characterized in that: the material of described leading-in pole and body is glass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310441764.XA CN103439455B (en) | 2013-09-25 | 2013-09-25 | Blending device used in direct titration detection method |
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| CN201310441764.XA CN103439455B (en) | 2013-09-25 | 2013-09-25 | Blending device used in direct titration detection method |
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Citations (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 |
| CN101484238A (en) * | 2006-06-29 | 2009-07-15 | 艾卡工厂有限及两合公司 | Microtiter plate with stirring elements |
| 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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- 2013-09-25 CN CN201310441764.XA patent/CN103439455B/en not_active Expired - Fee Related
Patent Citations (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 |
| CN101484238A (en) * | 2006-06-29 | 2009-07-15 | 艾卡工厂有限及两合公司 | Microtiter plate with stirring elements |
| 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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