CN203443898U - Blending device for direct titration detection method - Google Patents
Blending device for direct titration detection method Download PDFInfo
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- CN203443898U CN203443898U CN201320594467.4U CN201320594467U CN203443898U CN 203443898 U CN203443898 U CN 203443898U CN 201320594467 U CN201320594467 U CN 201320594467U CN 203443898 U CN203443898 U CN 203443898U
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- foamed sheet
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Abstract
The utility model discloses a blending device for a direct titration detection method. The blending device comprises a reaction vessel and at least one foaming sheet made of polytetrafluoroethylene, wherein the foaming sheets are placed at the bottom of a reactor; each foaming sheet is provided with at least one uniformly distributed foaming holes; two ends of each foaming hole are communicated. According to the blending device, the foaming sheets provided with multiple foaming holes are arranged at the bottom of the reaction vessel, so that uniform air bubbles can be produced when a reaction solution is boiled, the reaction solution and a titration solution are rapidly and uniformly mixed, and thus the detection accuracy and the detection stability are improved.
Description
Technical field
The utility model relates to detection technique field, is specifically related to a kind of evenly mixing device for 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 under boiling condition, to carry out titration, principle is that reducing sugar and Kocide SD generate copper oxidule precipitation through redox reaction under 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 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 because air impact reaction end is introduced in vibration, in titration process, can not vibrate or shake reagent bottle reaction system is mixed fast.The bubble producing due to the mixed process of the reaction solution bubble that boiling produces by reaction system completely and zeolite cannot make reactant liquor Quick uniform, thereby cause vs can not be fast in reactant liquor, diffusion uniformly, be that reactant liquor and vs cannot be with and mix soon, this causes drop reaction not complete moment, there is 5-10 reactant liquor in second mixing time, cannot be in the identical conditions titration end-point that judges while causing titration operation repetitive, and make the collimation of titration results poor.Due to above reason, the operation of the staff of detection total reducing sugar in real work can be greatly affected, and result Stability and veracity has certain deviation.
Utility model content
The purpose of this utility model is the deficiency existing in order to overcome above prior art, provides a kind of simple and reasonable for structure, the evenly mixing device for direct titration detection method that can Quick uniform reactant liquor.
The purpose of this utility model realizes by following technical scheme: this is for the evenly mixing device of direct titration detection method, comprise reaction vessels and at least one foamed sheet of being made by teflon, described foamed sheet is positioned over the bottom of reactor, described foamed sheet is provided with at least one equally distributed foam hole, and the two ends of described foam hole are connected.
More even for making reactant liquor mix with vs, described foamed sheet is positioned over the bottom of reactor.
The quantity of described foamed sheet is 2～10.
The bottom of described each foamed sheet and reaction vessels is affixed.Inhomogeneous for avoiding the above foamed sheet of 2 or 2 to stack causing together foaming, affect experimental result.
The thickness of described foamed sheet is 1mm～20mm.
The area of section of described foam hole is 0.78mm
2～50mm
2.
The quantity of described foam hole is 1～10.
Distance between described two adjacent foam holes is 1mm～20mm.
The cross section of described foam hole is circular square or oval triangle.Simultaneously the cross section of foam hole can also be other shapes arbitrarily, and for easy to process, the cross section of foam hole of the present utility model adopts circular.
Described foamed sheet rounded or triangle or quadrilateral.Concrete, the formation of foamed sheet can also be other shapes, as ellipse etc.
The method that mixes of described a kind of evenly mixing device for direct titration detection method, comprises the following steps:
1) pour appropriate reactant liquor into reaction vessels, then add appropriate water;
2) foamed sheet is laid in to the bottom of reaction vessels, then the reactant liquor in reaction vessels is heated, when reactant liquor is heated to boiling, make the air in the foam hole of foamed sheet flow out, and at foam hole place, form stable gasification center, thereby make reactant liquor produce fast uniform bubble, and the effect that these bubbles mix reactant liquor, realization response liquid is mixed fast.The diameter of foam hole is less, and when foamed sheet is put at the end of reaction vessels, even if reactant liquor has soaked foamed sheet, but because pore power and reactant liquor are in the tension force at foam hole place, the air in foam hole is not extruded.And when reactant liquor is heated, the air in foam hole just flows out, thereby make the reactant liquor that is positioned near foamed sheet (being desired location) produce applicable quantity and be applicable to big or small bubble, thereby make reactant liquor mix.Concrete, foamed sheet is all laid in the bottom of reaction vessels, and two adjacent foamed sheets do not stack, and each foamed sheet all can be affixed with the bottom of reaction vessels, and this improves Blending Efficiency of Blending.
The utility model has advantages of as follows with respect to prior art: this evenly mixing device for direct titration detection method is placed the foamed sheet of sheet by utilizing in the bottom of reaction vessels, and a plurality of foam holes are set on foamed sheet, thereby when a plurality of foamed sheets are positioned over to reactant liquor, effect due to foam hole, reactant liquor is reaching when boiling, produces fast fine and smooth and bubble uniformly near foam hole; Due to the equal capable of regulating of quantity, diameter, quantity and the setting of foam hole, therefore can be controlled at according to the actual conditions of reaction system the bubble occurrence degree of appointed area; Therefore make reactant liquor and the vs can Quick uniform, guarantee that titration operation repetitive can judge titration end-point under identical conditions, and the collimation of titration results be good, accuracy is high and good stability.This evenly mixing device for direct titration detection method is by arranging the foam hole of the two ends connection that size is less at foamed sheet.When detecting, described foamed sheet is soaked in reactant liquor, because the liquid pressure that reactant liquor forms is compared little with atmospheric pressure, and reactant liquor has larger surface tension at the two ends of foam hole, this can be avoided reactant liquor to enter the inner chamber of body, the air in foam hole can not get the gate, and foam hole internal memory has air.And when reactant liquor is heated to boiling, air expanded by heating in foam hole and flow out foam hole and form stable gasification center (claiming boiling center) thus produce bubble, at foaming nose end, form and make reaction system form fast fine and smooth and uniform bubble, mix fast reactant liquor.This evenly mixing device for direct titration detection method is used material less, and manufacture craft is less demanding, so cost of manufacture and quick, can realize batch production.This foamed sheet for the evenly mixing device of direct titration detection method is used teflon to make, and polytetrafluoroethylmaterial material has good chemical stability, corrosion resistance and heatproof excellence, therefore be highly suitable in the reactant liquor in highly basic, high temperature, uses.
Accompanying drawing explanation
Fig. 1 is the structural representation of the evenly mixing device for direct titration detection method of embodiment 1.
Fig. 2 is the structural representation of the evenly mixing device for direct titration detection method of embodiment 2.
Fig. 3 is the structural representation of the evenly mixing device for direct titration detection method of embodiment 3.
Fig. 4 is the structural representation of the evenly mixing device for direct titration detection method of embodiment 4.
Fig. 5 is the structural representation of the evenly mixing device for direct titration detection method of embodiment 5.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
A kind of evenly mixing device for direct titration detection method as shown in Figure 1, comprise reaction vessels and at least one foamed sheet of being made by teflon 1, described foamed sheet 1 is positioned over the bottom of reactor, described foamed sheet 1 is provided with at least 1 equally distributed foam hole 2, the two ends of described foam hole 2 are connected, and foam hole 2 is communicated with the above and below of foamed sheet 1.Meanwhile, simultaneously for convenience of processing, the cross section of described foam hole 2 be circle, and diameter is 1mm, and the area of section of foam hole 2 is 0.78mm
2.The described thickness of described foamed sheet 1 is 4mm, and foamed sheet 1 is rounded, and the diameter of foamed sheet 1 is 15mm.The quantity of described foam hole 2 is 6, and the distance between adjacent two foam holes 2 is 4mm.One of them foam hole 2 is positioned at the center of foamed sheet 1, and other 5 foam holes 2 are regular pentagon distribution with respect to center.
More even for making reactant liquor mix with vs, described foamed sheet 1 is positioned over the centre of the bottom of reactor.The quantity of described foamed sheet 1 is 6.Described each foamed sheet 1 is affixed with the bottom of reaction vessels.Meanwhile, this is to be avoided the above foamed sheet of 2 or 2 to stack causing together foaming inhomogeneous, affects experimental result.
The method that mixes of described a kind of evenly mixing device for direct titration detection method, comprises the following steps:
1) pour appropriate reactant liquor into reaction vessels, then add appropriate water;
2) foamed sheet 1 is laid in to the bottom of reaction vessels, then the reactant liquor in reaction vessels is heated, when reactant liquor is heated to boiling, make the air in the foam hole 2 of foamed sheet 1 flow out, and form stable gasification center at foam hole 2 places, thereby make reactant liquor produce fast uniform bubble, and the effect that these bubbles mix reactant liquor, realization response liquid is mixed fast.The diameter of foam hole 2 is less, and when foamed sheet 1 is put at the end of reaction vessels, even if reactant liquor has soaked foamed sheet 1, but because pore power and reactant liquor are in the tension force at foam hole 2 places, the air in foam hole 2 is not extruded.And when reactant liquor is heated, the air in foam hole 2 just flows out, thereby make the reactant liquor that is positioned near foamed sheet 1 (being desired location) produce applicable quantity and be applicable to big or small bubble, thereby make reactant liquor mix.In the present embodiment, the quantity of foamed sheet 1 is 6.6 foamed sheets 1 are all laid in reaction vessels bottom, and one of them foamed sheet 1 is positioned in the middle of reaction vessels bottom, and 5 remaining foamed sheets 1 distribute with respect to foamed sheet 1 even circumferential in the middle of being positioned in reaction vessels bottom, therefore when reactant liquor seethes with excitement, the foamed sheet that is positioned at these desired locations forms stable gasification center, even reactant liquor forms stable, uniform bubble in the position of setting, thereby makes reactant liquor mix.Meanwhile, these bubbles can also be adjusted size by changing the diameter of foam hole.
While carrying out test experience, draw 5.0mL Fehling I liquid and 5.0mL Fehling II liquid, as reactant liquor, be placed in 250mL conical flask (usining conical flask as reaction vessels), add water 50mL, add 6 foamed sheets 1, from buret, add in advance 19～20mL glucose standard solution, again the reactant liquor mixing is heated to boiling, and keep 2min, add 2 methylene blue indicator solutions, under fluidized state, in 1min, with glucose standard solution, be titrated to terminal (blue disappearance), record the cumulative volume of consumption of glucose standard solution, operation repetitive 9 times.
According to experiment, can obtain experimental data, not add foamed sheet and add the detection data of foamed sheet and do not add foamed sheet and add the computational data of foamed sheet respectively if the data in table 1(table 1 are that Fehling's reagent is demarcated consumption volume result) and table 2:
Table 1
| Experiment number | Do not add foamed sheet and consume volume (mL) | Add foamed sheet to consume volume (mL) |
| 1 | 20.71 | 20.12 |
| 2 | 20.61 | 20.10 |
| 3 | 20.82 | 20.14 |
| 4 | 20.85 | 20.16 |
| 5 | 20.92 | 20.20 |
| 6 | 20.76 | 20.19 |
| 7 | 20.78 | 20.15 |
| 8 | 20.74 | 20.18 |
| 9 | 20.75 | 20.19 |
Table 2
| ? | Do not add foamed sheet | Add foamed sheet |
| Mean value (mL) | 20.769 | 20.157 |
| Variance | 0.00744 | 0.00117 |
| Observed reading | 9 | 9 |
| Df(degree of freedom) | 8 | 8 |
| F | 6.329 | ? |
| The mono-tail of P | 0.0172 | ? |
| The mono-tail of F is critical | 3.18 | ? |
Wherein, the df in table 2 represents 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 represents 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 F=6.329 in table 2, it is 3.18 that its numerical value is greater than the mono-tail critical value of F, the result precision that this explanation does not add foamed sheet with add the precision of foamed sheet to there is significant difference, add the precision of foamed sheet higher.
This for evenly mixing device of direct titration detection method except following technical characterictic with embodiment 1: as shown in Figure 2, the cross section of described foam hole 2 is circle, and diameter is 3mm, and the area of section of foam hole 2 is 7.07mm
2.The described thickness of described foamed sheet 1 is 6mm.The quantity of described foam hole 2 is 3, and the distance between adjacent two foam holes 2 is 6mm.Described 3 foam holes 2 are equilateral triangle and distribute, and the distance between the center of described each foam hole 2 and foamed sheet 1 equates.
The thickness of described foamed sheet 1 is 6mm, and foamed sheet 1 is rounded, and the diameter of foamed sheet 1 is 20mm.
According to experiment, can obtain experimental data, not add foamed sheet and add the detection data of foamed sheet and do not add foamed sheet and add the computational data of foamed sheet respectively if the data in table 3(table 3 are that Fehling's reagent is demarcated consumption volume result) and table 4:
Table 3
| Experiment number | Do not add foamed sheet and consume volume (mL) | Add foamed sheet to consume volume (mL) |
| 1 | 20.71 | 20.75 |
| 2 | 20.61 | 20.80 |
| 3 | 20.82 | 20.84 |
| 4 | 20.85 | 20.88 |
| 5 | 20.92 | 20.81 |
| 6 | 20.76 | 20.83 |
| 7 | 20.78 | 20.86 |
| 8 | 20.74 | 20.84 |
| 9 | 20.75 | 20.78 |
Table 4
| ? | Do not add foamed sheet | Add foamed sheet |
| Mean value (mL) | 20.769 | 20.833 |
| Variance | 0.00744 | 0.00164 |
| Observed reading | 9 | 9 |
| df | 8 | 8 |
| F | 4.537 | ? |
| The mono-tail of P | 0.0466 | ? |
| The mono-tail of F is critical | 3.18 | ? |
Wherein, the df in table 4 represents 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 represents probability.Data in table 3 and table 4 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 F=4.537 in table 4, it is 3.18 that its numerical value is greater than the mono-tail critical value of F, the result precision that this explanation does not add foamed sheet with add the precision of foamed sheet to there is significant difference, add the precision of foamed sheet higher.
Embodiment 3
This for evenly mixing device of direct titration detection method except following technical characterictic with embodiment 1: as shown in Figure 3, the cross section of described foam hole 2 is circle, and diameter is 6mm, and the area of section of foam hole 2 is 28.26mm
2.The described thickness of described foamed sheet 1 is 6mm.The quantity of described foam hole 2 is 4, and the distance between adjacent two foam holes 2 is 6mm.Described 4 foam holes 2 are square and distribute, and the distance between the center of described each foam hole 2 and foamed sheet 1 equates.
The thickness of described foamed sheet 1 is 5mm, and foamed sheet 1 is rounded, and the diameter of foamed sheet 1 is 30mm.
According to experiment, can obtain experimental data, not add foamed sheet and add the detection data of foamed sheet and do not add foamed sheet and add the computational data of foamed sheet respectively if the data in table 5(table 5 are that Fehling's reagent is demarcated consumption volume result) and table 6:
Table 5
| Sequence number | Do not add foamed sheet and consume volume (mL) | Add foamed sheet to consume volume (mL) |
| 1 | 20.71 | 20.62 |
| 2 | 20.61 | 20.53 |
| 3 | 20.82 | 20.54 |
| 4 | 20.85 | 20.56 |
| 5 | 20.92 | 20.61 |
| 6 | 20.76 | 20.58 |
| 7 | 20.78 | 20.55 |
| 8 | 20.74 | 20.54 |
| 9 | 20.75 | 20.60 |
Table 6
| ? | Do not add foamed sheet | Add foamed sheet |
| Mean value (mL) | 20.769 | 20.570 |
| Variance | 0.00744 | 0.00113 |
| Observed reading | 9 | 9 |
| df | 8 | 8 |
| F | 6.584 | ? |
| The mono-tail of P | 0.0150 | ? |
| The mono-tail of F is critical | 3.18 | ? |
Wherein, the df in table 6 represents 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 represents probability.Data in table 5 and table 6 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 F=6.584 in table 6, it is 3.18 that its numerical value is greater than the mono-tail critical value of F, the result precision that this explanation does not add foamed sheet with add the precision of foamed sheet to there is significant difference, add the precision of foamed sheet higher.
Embodiment 4
This for evenly mixing device of direct titration detection method except following technical characterictic with embodiment 1: as shown in Figure 4, described foamed sheet 1 is triangular in shape.
Embodiment 5
This for evenly mixing device of direct titration detection method except following technical characterictic with embodiment 1: as shown in Figure 5, described foamed sheet 1 is quadrilateral.
Above-mentioned embodiment is preferred embodiment of the present utility model; can not limit the utility model; other any change that does not deviate from the technical solution of the utility model and make or other equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (9)
1. the evenly mixing device for direct titration detection method, it is characterized in that: comprise reaction vessels and at least one foamed sheet of being made by teflon, described foamed sheet is positioned over the bottom of reactor, described foamed sheet is provided with at least one equally distributed foam hole, and the two ends of described foam hole are connected.
2. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: described foamed sheet is positioned over the bottom of reactor.
3. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the quantity of described foamed sheet is 2～10.
4. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the bottom of described each foamed sheet and reaction vessels is affixed.
5. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the thickness of described foamed sheet is 1mm～20mm.
6. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the area of section of described foam hole is 0.78mm
2～50mm
2.
7. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the quantity of described foam hole is 1～10.
8. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the distance between described two adjacent foam holes is 1mm～20mm.
9. a kind of evenly mixing device for direct titration detection method according to claim 1, is characterized in that: the cross section of described foam hole is circular square or oval or triangle; Described foamed sheet rounded or triangle or quadrilateral.
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| CN201320594467.4U CN203443898U (en) | 2013-09-25 | 2013-09-25 | Blending device for direct titration detection method |
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| CN201320594467.4U CN203443898U (en) | 2013-09-25 | 2013-09-25 | Blending device for direct titration detection method |
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| CN203443898U true CN203443898U (en) | 2014-02-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472058A (en) * | 2013-09-25 | 2013-12-25 | 广州市酒类检测中心 | Uniformly-mixing device and method for direct titration detection method |
-
2013
- 2013-09-25 CN CN201320594467.4U patent/CN203443898U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472058A (en) * | 2013-09-25 | 2013-12-25 | 广州市酒类检测中心 | Uniformly-mixing device and method for direct titration detection method |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140219 Effective date of abandoning: 20160406 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |