CN217605425U

CN217605425U - Gun head type querhers purifying pipe for detecting pesticide residues

Info

Publication number: CN217605425U
Application number: CN202220821033.2U
Authority: CN
Inventors: 郝智清; 鹿泽启; 郝智红
Original assignee: Shandong Qingyun Chemical Technology Co ltd
Current assignee: Shandong Qingyun Chemical Technology Co ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-10-18
Anticipated expiration: 2032-04-11

Abstract

The utility model discloses a rifle head formula quesher purifying tube for pesticide residue detects of pesticide residue check out test set technical field, include: gun head assembly, gun head assembly includes rifle head body, sets up with the axle center first sieve, the setting of rifle head body inner chamber bottom are in the inner chamber of rifle head body with filler, the axle center setting that the top of first sieve contacted are in the second sieve and the axle center setting at rifle head body inner chamber top are in the third sieve of second sieve upper end, the second sieve with reserve the clearance between the third sieve, first sieve, second sieve and the third sieve all is the cylindric sieve that is formed by the sintering of polyethylene granule, the utility model discloses a after the supernatant was directly drawn to the rifle head body, the vortex vibrates 10 seconds, inserts the needle type filter, squeezes into the sample bottle and on the computer, has improved work efficiency.

Description

Gun head type querhers purifying pipe for detecting pesticide residues

Technical Field

The utility model relates to a pesticide residue check out test set technical field specifically is a rifle head formula quesher purifying tube that is arranged in pesticide residue to detect in vegetable oil.

Background

Pesticide residues (pesticides) are a general term for trace amounts of pesticide pathogens, toxic metabolites, degradants and impurities that remain in the organism, harvest, soil, water body, atmosphere without being decomposed during a period after the pesticide is used. The pesticide applied to the crops is partially attached to the crops, partially scattered in the environment such as soil, atmosphere and water, and part of the pesticide remained in the environment can be absorbed by the plants. The residual pesticide can directly reach the human body and the livestock body through plant fruits or water and atmosphere, or can be finally transferred to the human body and the livestock through the environment and a food chain. To date, chemical pesticides have been produced in the world at an annual yield of approximately 200 million tons, and approximately 1000 or more synthetic compounds have been used as pesticides such as insecticides, fungicides, algicides, insecticides, defoliants and the like. The pesticide, especially the organic pesticide, is applied in large amount, which causes serious pesticide pollution problem and becomes a serious threat to human health.

At present, the domestic detection method for pesticide residues in vegetables, fruits, grains, tea leaves and edible fungi mainly comprises methods of solid phase extraction, liquid-liquid extraction, quEChERS and the like, wherein the method of solid phase extraction is used for many years, the method of QuEChERS is popularized in China only in these years, but the QuEChERS products in the market are mainly in centrifugal tube form, have a series of specifications of 2ml,5ml,10ml,15ml, 50ml and the like, and are purified in centrifugal tube form, and the traditional QuEChERS method mainly comprises the following operation processes: firstly, weighing homogenized vegetable oil, adding acetonitrile or acetonitrile acetate, centrifuging, adding a salt bag, performing vortex oscillation for 1 minute, centrifuging for 4 minutes, taking supernate by using a liquid transfer gun, adding the supernate into a 15ml centrifugal tube type purification tube, centrifuging for 5 minutes after performing vortex oscillation for 1 minute, taking supernate by using the liquid transfer gun, putting the supernate into a glass container, finally extracting a proper amount of liquid by using a disposable syringe, adding a needle type filter, and then pumping the liquid into a sample bottle for loading, wherein the whole process needs about 30 minutes, is complex and seriously influences the working efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rifle head formula quesher purifying tube for pesticide residue detects to solve traditional QuEChERS method operation flow who provides among the above-mentioned background art and mainly be: firstly, weighing homogenized samples of vegetables, fruits, cereals, edible fungi, tea leaves and the like, adding acetonitrile or acetonitrile acetate, adding a salt bag after centrifugation, carrying out vortex oscillation for 1 minute and then centrifuging for 4 minutes, taking supernate by using a liquid transfer gun and adding the supernate into a 15ml centrifugal tube type purification tube, carrying out vortex oscillation for 1 minute and then centrifuging for 5 minutes, taking supernate by using the liquid transfer gun and then putting the supernate into a glass container, finally extracting a proper amount of liquid by using a disposable syringe, adding a needle type filter and then putting the supernate into a sample bottle for loading, wherein the whole process needs about 30 minutes, and the problem of seriously affecting the working efficiency is complicated.

In order to achieve the above object, the utility model provides a following technical scheme: a rifle head formula querhers purge tube for pesticide residue detects includes:

the device comprises a gun head assembly, wherein the gun head assembly comprises a gun head body, a first sieve plate coaxially arranged at the bottom of an inner cavity of the gun head body, a filler arranged in the inner cavity of the gun head body and contacted with the top of the first sieve plate, a second sieve plate coaxially arranged at the top of the inner cavity of the gun head body and a third sieve plate coaxially arranged at the top of the inner cavity of the gun head body and arranged at the upper end of the second sieve plate, and a gap is reserved between the second sieve plate and the third sieve plate.

Preferably, the first sieve plate, the second sieve plate and the third sieve plate are all cylindrical sieve plates sintered by polyethylene particles or polypropylene particles.

Preferably, the structure further comprises a limiting block assembly, the limiting block assembly comprises a limiting block arranged at the bottom of the outer side wall of the circumference of the gun head body and a threaded connecting ring arranged at the bottom of the limiting block coaxially, and the position of the limiting block corresponds to that of the first sieve plate.

Preferably, the gun head body further comprises an end cover assembly, wherein the end cover assembly comprises an end cover which is arranged on the circumferential outer side wall of the threaded connecting ring and covers the end face of the gun head body, and first internal threads which are arranged on the inner cavity side wall of the end cover and are matched with the threaded connecting ring.

Preferably, the connecting gun head further comprises a connecting port assembly, wherein the connecting port assembly comprises a connecting port coaxially arranged on the gun head body and far away from one end of the first sieve plate, and second internal threads arranged on the side wall of an inner cavity of the connecting port.

Compared with the prior art, the beneficial effects of the utility model are that: according to the gun head type querhers purifying tube for detecting pesticide residues in vegetable oil, after supernatant is directly sucked through the gun head body, vortex oscillation is carried out for 10 seconds, a needle type filter is inserted, the supernatant is thrown into a sample bottle, and the sample bottle is put on a machine, so that the working efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the gun head assembly of the present invention;

fig. 3 is a partially enlarged schematic view of the gun head body of the present invention;

FIG. 4 is a schematic view of the structure of the stop block assembly of the present invention;

FIG. 5 is a schematic structural view of the end cap assembly of the present invention;

fig. 6 is a schematic structural view of the port connecting assembly of the present invention.

In the figure: a tip assembly 100, a tip body 110, a first screening deck 120, a filler 130, a second screening deck 140, a third screening deck 150, a stop block assembly 200, a stop block 210, a threaded connector ring 220, an end cap assembly 300, an end cap 310, first internal threads 320, a port assembly 400, a connection port 410, and second internal threads 420.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a rifle head formula quesher purifying tube for pesticide residue detects directly absorbs the supernatant through rifle head body after, and the vortex vibrates 10 seconds, inserts the needle type filter, impresses into the sample bottle and operate the machine, has improved work efficiency, please refer to figure 1, include: the gun head assembly 100, the limiting block assembly 200, the end cover assembly 300 and the port assembly 400;

referring to fig. 1-2, the lance tip assembly 100 includes a lance tip body 110, a first sieve plate 120 coaxially disposed at the bottom of an inner cavity of the lance tip body 110, a filler 130 disposed in the inner cavity of the lance tip body 110 and contacting with the top of the first sieve plate 120, a second sieve plate 140 coaxially disposed at the top of the inner cavity of the lance tip body 110, and a third sieve plate 150 coaxially disposed at the top of the inner cavity of the lance tip body 110 and disposed at the upper end of the second sieve plate 140, a gap is reserved between the second sieve plate 140 and the third sieve plate 150, the first sieve plate 120, the second sieve plate 140, and the third sieve plate 150 are all cylindrical sieve plates sintered from polyethylene particles or polypropylene particles, the specification of the lance tip body 110 may be 1ml, 2ml,5ml,10ml,15ml, 50ml, etc., the lance tip bodies 110 with different specifications are selected according to test requirements, the first sieve plate 120 and the lance tip body 110 are integrally processed, the second sieve plate 140 and the gun head body 110 are integrally processed, the third sieve plate 150 and the gun head body 110 are integrally processed, the filler 130 is PSA (N-propylethylenediamine), anhydrous magnesium sulfate, C18 (octadecyl bonded silane), GCB (graphitized carbon black), the filler 130 may also be a multi-walled carbon nanotube or a common salt, such as anhydrous sodium sulfate, and a gap is reserved between the filler 130 and the second sieve plate 140, when the gun head is specifically used, the homogenized vegetable oil sample is weighed, acetonitrile or acetonitrile acetate is added, the salt bag is added after centrifugation, the supernatant is directly sucked by the gun head body 110 after vortex oscillation, the supernatant enters the inner cavity of the gun head body 110 through the first sieve plate 120 and the filler 130, organic acids, fats, pigments, and pigments in the supernatant are removed through the filler 130, impurities such as alcohols and the like are suspended between the filler 130 and the second sieve plate 140, vortex and vibrate for 10 seconds, a needle type filter is inserted, and the impurities are thrown into a sample bottle to be put on a machine, and the whole process is about 10 minutes;

referring to fig. 1-2 and 4, the limiting block assembly 200 includes a limiting block 210 disposed at the bottom of the circumferential outer side wall of the gun head body 110 and a threaded connection ring 220 coaxially disposed at the bottom of the limiting block 210, the position of the limiting block 210 corresponds to the position of the first sieve plate 120, the limiting block 210 and the gun head body 110 are integrally processed, and when supernatant is sucked, the limiting block 210 limits the depth of the gun head body 110 extending into the inner cavity of the centrifugal tube, so as to prevent the gun head body 110 from extending into the centrifugal tube too deep and extracting turbid liquid at the bottom of the centrifugal tube;

referring to fig. 1-2 and 4-5, the end cap assembly 300 includes an end cap 310 mounted on the circumferential outer side wall of the threaded connection ring 220 and covering the end face of the gun head body 110, and a first internal thread 320 provided on the inner cavity side wall of the end cap 310 and matching with the threaded connection ring 220, the end cap 310 is mounted on the circumferential outer side wall of the threaded connection ring 220 through threaded connection, the end cap 310 covers the liquid taking port of the gun head body 110 through the threaded connection ring 220, and when the gun head body is not used and vortex oscillation is performed, the liquid taking port of the gun head body 110 is protected by the end cap 310, so that the liquid taking port is prevented from being polluted;

referring to fig. 1-2 and fig. 6, the connection port assembly 400 includes a connection port 410 coaxially disposed on an end of the gun head body 110 far from the first sieve plate 120 and a second internal thread 420 disposed on a sidewall of an inner cavity of the connection port 410, the connection port 410 and the gun head body 110 are integrally formed, and the connection port assembly 400 is a standard component and can be adapted to an existing pipette.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A rifle head formula querters purge tube for pesticide residue detects which characterized in that: the method comprises the following steps:

the lance head assembly (100) comprises a lance head body (110), a first sieve plate (120) coaxially arranged at the bottom of an inner cavity of the lance head body (110), a filler (130) arranged in the inner cavity of the lance head body (110) and in contact with the top of the first sieve plate (120), a second sieve plate (140) coaxially arranged at the top of the inner cavity of the lance head body (110), and a third sieve plate (150) coaxially arranged at the top of the inner cavity of the lance head body (110) and at the upper end of the second sieve plate (140), wherein a gap is reserved between the second sieve plate (140) and the third sieve plate (150).

2. The lance-head querhers purification tube for detecting pesticide residues as claimed in claim 1, wherein: the first sieve plate (120), the second sieve plate (140) and the third sieve plate (150) are all cylindrical sieve plates formed by sintering polyethylene particles or polypropylene particles.

3. The gun-head type querters purifying tube for detecting pesticide residues as claimed in claim 2, wherein: the novel spray gun head comprises a gun head body (110), and is characterized by further comprising a limiting block assembly (200), wherein the limiting block assembly (200) comprises a limiting block (210) arranged at the bottom of the circumferential outer side wall of the gun head body (110) and a threaded connecting ring (220) coaxially arranged at the bottom of the limiting block (210), and the position of the limiting block (210) corresponds to that of the first sieve plate (120).

4. The lance-head querhers purification tube for detecting pesticide residues as claimed in claim 3, wherein: the end cover assembly (300) comprises an end cover (310) which is arranged on the circumferential outer side wall of the threaded connecting ring (220) and covers the end face of the gun head body (110), and first internal threads (320) which are arranged on the inner cavity side wall of the end cover (310) and matched with the threaded connecting ring (220).

5. The gun-head type querters purifying tube for detecting pesticide residues as claimed in claim 4, wherein: the connecting structure further comprises a connecting port assembly (400), wherein the connecting port assembly (400) comprises a connecting port (410) coaxially arranged at one end, far away from the first sieve plate (120), of the lance head body (110) and second internal threads (420) arranged on the side wall of an inner cavity of the connecting port (410).