CN203044027U - Suction pipe for fast detecting pesticide residue - Google Patents
Suction pipe for fast detecting pesticide residue Download PDFInfo
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- CN203044027U CN203044027U CN 201220721721 CN201220721721U CN203044027U CN 203044027 U CN203044027 U CN 203044027U CN 201220721721 CN201220721721 CN 201220721721 CN 201220721721 U CN201220721721 U CN 201220721721U CN 203044027 U CN203044027 U CN 203044027U
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- suction pipe
- pesticide residue
- purification
- sieve plate
- fast
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Abstract
The utility model relates to the field of detection of residual pesticides contained in agricultural products, and particularly relates to a pipettor suction pipe for fast detecting pesticide residues and purifying a sample solution. The suction pipe comprises a pipe body and a purification body, wherein the purification body is fixed on the lower part inside the pipe body, and the purification body comprises an upper screen plate, a lower screen plate and a solid-phase adsorbent positioned between the upper screen plate and the lower screen plate. The suction pipe for fast detecting the pesticide residues, which is provided by the utility model, has an excellent separation and purification capacity, can be used for adsorbing interfering materials to the solid-phase adsorbent by contacting the sample solution containing the interfering materials with the solid-phase adsorbent, efficiently, fast and conveniently obtains the sample extracting solution by carrying out two-time purification and purification on the sample solution in the suction and discharge process of the sample solution, has the advantages of convenience for operation, low cost, safety, environmental protection, time and labor saving and liquid transfer, separation and purification integration and is especially suitable for fast detecting the pesticide residues contained in fruit and vegetable agricultural products.
Description
Technical field
The utility model relates to Determination of Residues Pesticide field in the agricultural product, is specifically related to a kind ofly for the Fast Determination of Pesticide Residue sample pre-treatments, sample solution is purified the pipettor suction pipe of purification.
Background technology
Rapid detector for pesticide residue is efficient because of it, quick, economical, in real time, characteristics such as scene and coverage rate height, each link of the examination of residues of pesticides and monitoring is being brought into play important effect in the fruits and vegetables agricultural product.Rapid detector for pesticide residue is conducive in time find the residual problem that exceeds standard of farming, be ensure the fruits and vegetables agricultural products safely, set up the powerful mean of the market access rule of agricultural product.
Sample pre-treatments is the key link that trace analysis detects, and is one of important step in the Fast Determination of Pesticide Residue process.Traditional pre-treating method, as liquid-liquid extraction, cable-styled extraction, chromatography, distillation, centrifugal, precipitation, homogenate, saltout etc., manual steps is many, and the processing time is long, is unsuitable for using in fast detecting; And need to use a large amount of solvents, not only lose sample easily, cause than mistake, and used organic solvent in handling, all may have a negative impact to operator ' s health and environment.In addition, Fast Determination of Pesticide Residue is primarily aimed at fresh and alive fruits and vegetables agricultural product, usually contain in this type of sample to the influential plant secondary substance of enzyme preparation or to influential pigment of optical detection etc., the difference of the testing result that these interfering materials cause has had a strong impact on fast detecting result's accuracy and confidence level, becomes the present bottleneck that influences the application of rapid detector for pesticide residue device.The sample pre-treatments technological development direction that following persticide residue detects should be as much as possible fast, economy, environmental protection and simple and easy, and avoid sample to shift the loss that causes as much as possible, reduce the accidental error of various human factors, this pretreatment technology to sample is had higher requirement.Therefore, efficient, convenient, quick and few solvent, even solvent-free sample preparation and pre-treating method are the focuses of research always.This reduces sample composition to detecting the interference of reagent and instrument to guaranteeing accuracy and the reliability of measurement result, improves fast detecting efficient and all has significant effects.
Stipulated the conventional method of sample pre-treatments in the national standard " fast detecting of organophosphor and carbamate pesticide residue amount in the GB/T 5009.199-2003 vegetables ": choose representational vegetable sample, rinse out surperficial earth, be cut into the square fragment in the 1cm left and right sides, sample thief 1g puts into beaker or extraction flask, adds 5mL cushioning liquid, vibration 1min-2min, pour out extract, leave standstill 3min-5min, stand-by.In this process, sample obtains extract by the vibration of mixing in buffer solution, and the solubility Secondary Metabolism of Plant material in this solution is directly used in subsequent detection without purification, and experiment reagent and optical detection are had considerable influence.Problem at Fast Determination of Pesticide Residue pre-treatment existence, when detecting at the scene, the pipettors that use pipette in the extract adding reaction system more, if can when pipetting solution, carry out purified treatment to sample solution, both improved the quality of sample solution, do not increase pre-treatment step and time again, for reducing the false positive that produces because of interfering material in the sample solution, improving the efficient of Fast Determination of Pesticide Residue pre-treatment and the degree of accuracy of detection has important effect.This is to overcoming unfavorable factors such as vegetables and fruit sample system complexity, preliminary treatment formality be numerous and diverse, for purification and the analysis of sample provides a great convenience, is suitable for the preparation of sample solution in the residues of pesticides field quick detection.
Therefore, be necessary to propose a kind of pre-treatment suction pipe for Fast Determination of Pesticide Residue and specify corresponding working specification at the problems referred to above.
The utility model content
(1) technical problem that will solve
The purpose of this utility model is the deficiency at existing Fast Determination of Pesticide Residue pre-treatment kit, a kind of pipettor suction pipe that is applicable to the fast detecting of organophosphor and carbamate pesticide residue amount in the fruits and vegetables agricultural product is provided, can reach the selective cleaning and the purification that simply, fast, efficiently realize organophosphorus pesticide in the environment, can be directly used in field monitoring, and improve the accuracy that detects, reduce false positive rate.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of suction pipe for Fast Determination of Pesticide Residue, comprise body and the purifying body that is fixed in below, body inside, described purifying body is made up of upper sieve plate, following sieve plate and the solid-phase adsorbent between upper sieve plate and following sieve plate.
Wherein, described body lower end is suction nozzle, and described purifying body is positioned at suction nozzle.
Wherein, described suction nozzle is conical.
Wherein, described upper sieve plate and following sieve plate are the polyethylene sieve plate.
Wherein, the aperture of described upper sieve plate and following sieve plate is 5 μ m-20 μ m.
Wherein, described solid-phase adsorbent is mixed by MgSO4, PSA and C18.
Wherein, the ratio of described MgSO4, PSA and C18 is 1:1:1.
Wherein, the particle size range of described solid-phase adsorbent is 20 μ m-100 μ m.
Wherein, described suction pipe upper end for Fast Determination of Pesticide Residue connects pipettor.
Wherein, described suction pipe upper end rubber stopper seal for Fast Determination of Pesticide Residue.
(3) beneficial effect
The suction pipe that is used for Fast Determination of Pesticide Residue that the utility model provides has excellent separation and purification ability, by the sample solution that contains interfering material is contacted with solid-phase adsorbent, interfering material is adsorbed on the solid-phase adsorbent, drawing and discharging in the process of solution, solution is carried out purifying twice, to obtain sample extracting solution efficiently, fast and easily.Simultaneously, this suction pipe is easy to operate, with low cost, safety and environmental protection, time saving and energy saving, the collection pipette liquid and separation and purification and one, be particularly useful for the fast detecting of residues of pesticides in the fruits and vegetables agricultural products.
Description of drawings
Fig. 1 is used for the preceding structural representation of suction pipe draw solution of Fast Determination of Pesticide Residue for the utility model;
Fig. 2 is used for the structural representation of the suction pipe draw solution process of Fast Determination of Pesticide Residue for the utility model;
Fig. 3 is the enlarged drawing of suction nozzle among Fig. 2;
Structural representation when Fig. 4 discharges solution for the utility model for the suction pipe of Fast Determination of Pesticide Residue;
Fig. 5 is the enlarged drawing of suction nozzle among Fig. 4.
Among the figure, 1: body; 2: upper sieve plate; 3: following sieve plate; 4: solid-phase adsorbent; 5: suction nozzle; 6: extraction flask; 7: chaff interference.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
In description of the present utility model, need to prove, term " " center "; " vertically "; " laterally "; " on "; D score; " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", close the orientation of indications such as " outward " or position is based on orientation shown in the drawings or position relation, only be the utility model and simplification description for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. only are used for describing purpose, and can not be interpreted as indication or hint relative importance.
In description of the present utility model, need to prove that unless clear and definite regulation and restriction are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete implication of above-mentioned term in the utility model.
In addition, in description of the present utility model, except as otherwise noted, the implication of " a plurality of ", " many ", " many groups " is two or more.
As shown in Figure 1 and Figure 2, the utility model provides a kind of suction pipe for Fast Determination of Pesticide Residue, comprise body 1 and the purifying body that is fixed in below, body inside, the purifying body is made up of upper sieve plate 2, following sieve plate 3 and the solid-phase adsorbent 4 between upper sieve plate 2 and following sieve plate 3.
Wherein, body 1 lower end is provided with suction nozzle 5, and the purifying body is positioned at suction nozzle 5.More preferably, suction nozzle 5 is conical.
Wherein, upper sieve plate 2 and following sieve plate 3 are the polyethylene sieve plate.The aperture of upper sieve plate 2 and following sieve plate 3 is 5-20 μ m, can adopt different apertures as the case may be, and more preferably, the aperture is 15 μ m.
Wherein, solid-phase adsorbent is MgSO
4, PSA(primary secondary amine, N-propyl group ethylenediamine) and C
18The mixture of forming.More preferably, MgSO
4, PSA and C
18Ratio be 1:1:1.The particle size range of solid-phase adsorbent is 20 μ m-100 μ m.Wherein, PSA has the ion-exchange capacity stronger than nh 2 column.MgSO in the solid-phase adsorbent
4Play the effect of drier, be used for removing redundant moisture; PSA can produce huge legendary turtle cooperation usefulness with metal ion, is used for extracting metal ion, also can effectively remove aliphatic acid, organic acid, some polarity pigment and sugar; C
18Nonpolar component there is suction-operated.Therefore by MgSO
4, PSA and C
18The solid-phase adsorbent of forming can be separated the chaff interference 7 in the solution to be detected, and chaff interference and solid-phase adsorbent after the separation are attached together.
The specification of the suction pipe that is used for Fast Determination of Pesticide Residue in the present embodiment is as follows: liquid absorption is 5mL, internal diameter 13mm, length 160mm.
The detailed process that this suction pipe is used for Fast Determination of Pesticide Residue is as follows:
(1) choose representational fruits and vegetables sample, obtain test specimen according to material characteristics sampling division after, get an amount of sample, put into extraction flask 6, add 5mL cushioning liquid at least, vibration 1min-2min is with suction pipe draw solution described in the utility model (referring to Fig. 1);
(2) in the process with suction pipe draw solution described in the utility model, the interfering material 7 in the solution is attracted on the solid-phase adsorbent gradually (referring to Fig. 2-Fig. 3);
(3) solution in the suction pipe in the step (2) is added in the follow-up test container, when discharging liquid, solution is again through solid-phase adsorbent, carried out double purification (referring to Fig. 4-Fig. 5).Because interfering material is adsorbed by solid-phase adsorbent, thereby can reagent and the instrument of Fast Determination of Pesticide Residue not exerted an influence, and has reduced false positive rate, has guaranteed subsequent detection result's accuracy.
In addition and since the pressure loss at purifying body two ends be 0.5kPa to 50kPa, thereby the suction pipe that should be used for Fast Determination of Pesticide Residue can be used as pipettor rifle head and pipettor is used, with draw solution quickly and easily.Certainly, in situation about being fit to, also can by external needle tubing or other devices, make the inside and outside pressure difference that produces of suction pipe draw and discharge solution in the upper end rubber stopper seal with this suction pipe.
The suction pipe that should be used for Fast Determination of Pesticide Residue has excellent separation and purification ability, by the sample solution that contains interfering material is contacted with solid-phase adsorbent, interfering material is adsorbed on the solid-phase adsorbent, drawing and discharging in the process of solution, solution is carried out purifying twice, to obtain sample extracting solution efficiently, fast and easily.Simultaneously, this suction pipe is easy to operate, with low cost, safety and environmental protection, time saving and energy saving, the collection pipette liquid and separation and purification and one, be particularly useful for the fast detecting of residues of pesticides in the fruits and vegetables agricultural products.
The above only is preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection domain of the present utility model.
Claims (8)
1. a suction pipe that is used for Fast Determination of Pesticide Residue is characterized in that, comprises body and the purifying body that is fixed in below, body inside, and described purifying body is made up of upper sieve plate, following sieve plate and the solid-phase adsorbent between upper sieve plate and following sieve plate.
2. the suction pipe for Fast Determination of Pesticide Residue as claimed in claim 1 is characterized in that, described body lower end is suction nozzle, and described purifying body is positioned at suction nozzle.
3. the suction pipe for Fast Determination of Pesticide Residue as claimed in claim 2 is characterized in that, described suction nozzle is conical.
4. the suction pipe for Fast Determination of Pesticide Residue as claimed in claim 1 is characterized in that, described upper sieve plate and following sieve plate are the polyethylene sieve plate.
5. the suction pipe for Fast Determination of Pesticide Residue as claimed in claim 1 is characterized in that, the aperture of described upper sieve plate and following sieve plate is 5 μ m-20 μ m.
6. as each described suction pipe for Fast Determination of Pesticide Residue of claim 1-5, it is characterized in that the particle size range of described solid-phase adsorbent is 20 μ m-100 μ m.
7. as each described suction pipe for Fast Determination of Pesticide Residue of claim 1-5, it is characterized in that described suction pipe upper end for Fast Determination of Pesticide Residue connects pipettor.
8. as each described suction pipe for Fast Determination of Pesticide Residue of claim 1-5, it is characterized in that described suction pipe upper end rubber stopper seal for Fast Determination of Pesticide Residue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220721721 CN203044027U (en) | 2012-12-24 | 2012-12-24 | Suction pipe for fast detecting pesticide residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220721721 CN203044027U (en) | 2012-12-24 | 2012-12-24 | Suction pipe for fast detecting pesticide residue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203044027U true CN203044027U (en) | 2013-07-10 |
Family
ID=48727028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220721721 Expired - Lifetime CN203044027U (en) | 2012-12-24 | 2012-12-24 | Suction pipe for fast detecting pesticide residue |
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| Country | Link |
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| CN (1) | CN203044027U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964868A (en) * | 2015-06-29 | 2015-10-07 | 苏州东辰林达检测技术有限公司 | Detecting method for pesticide residue in fruits |
| CN105203377A (en) * | 2015-09-29 | 2015-12-30 | 齐国良 | Purifying device for pretreatment of Aspergillus flavus and method adopting same |
| CN107080973A (en) * | 2017-05-17 | 2017-08-22 | 中国地质大学（武汉） | A kind of dropper solid-phase extraction device and method and the preparation method of the device |
| CN111207958A (en) * | 2020-01-08 | 2020-05-29 | 中国农业科学院农业质量标准与检测技术研究所 | Pretreatment agent and pretreatment package for organophosphorus pesticide detection and application thereof |
-
2012
- 2012-12-24 CN CN 201220721721 patent/CN203044027U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964868A (en) * | 2015-06-29 | 2015-10-07 | 苏州东辰林达检测技术有限公司 | Detecting method for pesticide residue in fruits |
| CN105203377A (en) * | 2015-09-29 | 2015-12-30 | 齐国良 | Purifying device for pretreatment of Aspergillus flavus and method adopting same |
| CN107080973A (en) * | 2017-05-17 | 2017-08-22 | 中国地质大学（武汉） | A kind of dropper solid-phase extraction device and method and the preparation method of the device |
| CN111207958A (en) * | 2020-01-08 | 2020-05-29 | 中国农业科学院农业质量标准与检测技术研究所 | Pretreatment agent and pretreatment package for organophosphorus pesticide detection and application thereof |
| CN111207958B (en) * | 2020-01-08 | 2022-08-02 | 中国农业科学院农业质量标准与检测技术研究所 | Pretreatment agent and pretreatment package for organophosphorus pesticide detection and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |