CN214182956U - Device is prepared to standard solution - Google Patents
Device is prepared to standard solution Download PDFInfo
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- CN214182956U CN214182956U CN202022638052.5U CN202022638052U CN214182956U CN 214182956 U CN214182956 U CN 214182956U CN 202022638052 U CN202022638052 U CN 202022638052U CN 214182956 U CN214182956 U CN 214182956U
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Abstract
The utility model relates to the technical field of experimental instruments, and discloses a standard solution preparation device, which comprises a rubber head dropper assembly, a sleeve, a sample weighing spoon body and a volumetric flask, wherein the rubber head dropper assembly comprises a rubber head dropper and a solvent on-off valve, the rubber head dropper is provided with a first solvent channel, the solvent on-off valve is arranged on the rubber head dropper, and the solvent on-off valve is used for controlling the on-off of the first solvent channel; the sleeve is provided with a through hole allowing the rubber head dropper to penetrate through, and the sleeve is arranged on the rubber head dropper; the sample weighing spoon body comprises a spoon handle and a spoon head, the spoon head is arranged at one end of the spoon handle, the spoon handle is connected with the sleeve, and the spoon head is arranged outside the sleeve; the volumetric flask is provided with one end open-ended cavity. The utility model provides a device is prepared to standard solution to reach the purpose of weighing process and constant volume process that reduces the loss of standard, simplifies the standard.
Description
Technical Field
The utility model relates to an experimental apparatus technical field especially relates to a device is prepared to standard solution.
Background
The standard substance refers to a standard substance used for identification, detection, content determination, impurity and related substance inspection and the like in national drug standards, and therefore, in the detection process of food and agricultural products, the standard substance is often used for preparing a standard substance solution, and the preparation process of the standard substance solution is as follows:
s1, weighing the standard substance by using a weighing spoon, and putting the weighed standard substance into a miniature beaker;
s2, dropping a certain amount of solvent into the micro beaker to dissolve the standard substance;
s3, transferring the standard solution in the micro beaker to a volumetric flask, repeatedly cleaning the micro beaker with a solvent for a plurality of times, transferring the micro beaker to the volumetric flask, and fixing the volume to a scale;
and S4, cleaning the measuring spoon.
However, the existing preparation process of the standard solution has certain defects:
(1) in step S3, in the process of transferring the standard from the micro beaker to the volumetric flask, part of the standard remains in the micro beaker, and the quality of the standard in the volumetric flask in step S3 is less than that of the standard in the micro beaker in step S1, so that the quality of the standard in the volumetric flask in step S3 does not meet the experimental requirements, thereby causing inaccuracy of the experimental result;
(2) different devices are used in the weighing process and the constant volume process of the standard product respectively, so that the weighing process and the constant volume process of the standard product become complicated, and the quantitative accuracy of the standard product can be influenced.
Disclosure of Invention
The utility model aims at: the utility model provides a device is prepared to standard solution to reach the purpose of weighing process and constant volume process that reduces the loss of standard, simplifies the standard.
In order to achieve the above object, the utility model provides a device is prepared to standard solution, it includes:
the rubber head dropper assembly comprises a rubber head dropper and a solvent on-off valve, the rubber head dropper is provided with a first solvent channel, the solvent on-off valve is arranged on the rubber head dropper, and the solvent on-off valve is used for controlling the on-off of the first solvent channel;
the sleeve is provided with a through hole allowing the rubber head dropper to penetrate through, and the sleeve is arranged on the rubber head dropper;
the sample weighing spoon comprises a sample weighing spoon body and a sample weighing spoon head, wherein the sample weighing spoon body comprises a spoon handle and a spoon head, the spoon head is arranged at one end of the spoon handle, the spoon handle is connected with the sleeve, and the spoon head is arranged outside the sleeve;
the volumetric flask, the volumetric flask is equipped with one end open-ended cavity.
In some embodiments of the present application, the sleeve is detachably connected to the dropper.
In some embodiments of the present application, the rubber head dropper includes a glass tube, a rubber head sleeved on a head portion of the glass tube, and a tip disposed on a tail portion of the glass tube, and the sleeve is an elastic member;
the inner side wall of the spoon handle is matched with the outer side wall of the glass tube, and the glass tube and the spoon handle are arranged in the through hole of the sleeve.
In some embodiments of the present application, the tip is located outside the sleeve, the tip with the spoon handle toward keeping away from the direction of telescopic bottom sets gradually.
In some embodiments of the present application, the glass tube comprises a tube body and an intermediate tube, the intermediate tube is integrally disposed on the tube body, and the first solvent channel is disposed on the tube body;
the solvent on-off valve is rotatably connected in the middle pipe, and the inner wall of the middle pipe is abutted against the outer wall of the solvent on-off valve; the solvent on-off valve is provided with a second solvent channel, and the second solvent channel and the first solvent channel are arranged correspondingly.
In some embodiments of the present application, the outer sidewall of the glass tube is provided with a scale.
In some embodiments of the present application, the volumetric flask is removably attached at its opening with a sealing plug.
In some embodiments of the present application, the top end of the volumetric flask is connected with a flow guide, which is a bowl-shaped arrangement.
In some embodiments of the present application, the standard solution dispensing device further comprises a holder for holding the volumetric flask.
In some embodiments of this application, the top interval of fixing base is equipped with a plurality of springs, the bottom of volumetric flask is passed through the spring clamp is located on the fixing base.
The embodiment of the utility model provides a device is prepared to standard solution, it compares with prior art, and its beneficial effect lies in:
the sleeve is arranged on the rubber head dropper, the spoon handle is connected with the sleeve, and the spoon head is arranged outside the sleeve, so that the rubber head dropper assembly and the sample weighing spoon body are integrated, a user can hold the rubber head dropper by hand, the sample weighing spoon body can be used as a standard product, and the standard product is poured into the volumetric flask; in addition, user's accessible extrusion rubber head drip tube absorbs the solvent to extrude the solvent to the cavity of volumetric flask in, with carry out the constant volume to the standard substance, from this, through above-mentioned setting, not only make the standard substance directly pour into the volumetric flask in, reduce the loss of standard substance, make the device of process and the constant volume process sharing of weighing of standard substance moreover, need not the user and change different devices, thereby simplify the process and the constant volume process of weighing of standard substance.
Drawings
Fig. 1 is a schematic structural diagram of a standard solution preparation device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a rubber-tipped dropper assembly according to an embodiment of the present invention.
Fig. 3 is a schematic view of the connection structure of the volumetric flask, the sealing plug and the flow guide member according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a fixing base according to an embodiment of the present invention.
In the figure, 1, a rubber head dropper component; 11. a rubber head dropper; 111. a glass tube; 1111. a tube body; 1112. an intermediate pipe; 112. gluing heads; 113. a tip; 12. a solvent on-off valve; 2. a sleeve; 21. a through hole; 3. weighing the sample spoon body; 31. a spoon handle; 32. a spoon head; 4. a volumetric flask; 5. a sealing plug; 6. a flow guide member; 7. a fixed seat; 8. a spring.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1-4, a standard solution preparing apparatus provided by a preferred embodiment of the present invention includes a rubber-tipped dropper assembly 1, a sleeve 2, a sample weighing scoop body 3 and a volumetric flask 4, the rubber-tipped dropper assembly 1 includes a rubber-tipped dropper 11 and a solvent on-off valve 12, the rubber-tipped dropper 11 is provided with a first solvent channel, the solvent on-off valve 12 is provided on the rubber-tipped dropper 11, and the solvent on-off valve 12 is used for controlling on-off of the first solvent channel; the sleeve 2 is provided with a through hole 21 allowing the rubber head dropper 11 to pass through, and the sleeve 2 is arranged on the rubber head dropper 11; the sample weighing spoon body 3 comprises a spoon handle 31 and a spoon head 32, the spoon head 32 is arranged at one end of the spoon handle 31, the spoon handle 31 is connected with the sleeve 2, and the spoon head 32 is arranged outside the sleeve 2; the volumetric flask 4 is provided with a cavity with one open end.
Based on the above arrangement, the standard solution preparation device of the embodiment of the present invention, by disposing the sleeve 2 on the rubber head dropper 11, the spoon handle 31 is connected to the sleeve 2, and the spoon head 32 is disposed outside the sleeve 2, therefore, the rubber head dropper assembly 1 and the sample weighing spoon body 3 are integrated, and a user can hold the rubber head dropper 11 by hand, so that the sample weighing spoon body 3 can be used as a standard product, and pour the standard product into the volumetric flask 4; in addition, user's accessible extrudees rubber head burette 11, absorbs the solvent to extrude the solvent to volumetric flask 4's cavity in, with carry out the constant volume to the standard substance, from this, through the aforesaid setting, not only make the standard substance directly pour into volumetric flask 4 in, reduce the loss of standard substance, make the device of process and the constant volume process sharing of weighing of standard substance moreover, need not the user and change different devices, thereby simplify the process and the constant volume process of weighing of standard substance.
In some embodiments of the present application, as shown in fig. 1 and 2, the sleeve 2 is detachably connected to the burette 11, in other words, when the standard is subjected to constant volume, the user removes the sleeve 2 from the burette 11, so that the sample weighing scoop 3 does not obstruct the burette 11 when the solvent is dripped from the burette 11; in addition, after the standard substance is subjected to constant volume, the separated sleeve 2 and the rubber head dropper 11 can be conveniently and separately stored for the rubber head dropper assembly 1 and the sample weighing spoon body 3 by a user.
In some embodiments of the present application, as shown in fig. 1 and 2, the tip dropper 11 includes a glass tube 111, a tip 112 disposed at the head of the glass tube 111, and a tip 113 disposed at the tail of the glass tube 111, and the sleeve 2 is an elastic member, so that by setting the material of the sleeve 2 as an elastic material, the sleeve 2 can be elastically deformed, so that the sleeve 2 can contact with the glass tube 111 or both the glass tube 111 and the spoon handle 31, where the material of the sleeve 2 is ptfe;
wherein, the inner side wall of the spoon handle 31 is matched with the outer side wall of the glass tube 111, and the glass tube 111 and the spoon handle 31 are arranged in the through hole 21 of the sleeve 2, therefore, when the spoon handle 31 is inserted into the through hole 21 of the sleeve 2, the spoon handle 31 can be well matched and connected with the outer side wall of the glass tube 111, thereby facilitating the insertion of the spoon handle 31 into the through hole 21 of the sleeve 2;
in addition, when the sleeve 2 is sleeved on the glass tube 111, the inner wall of the through hole 21 of the sleeve 2 contacts with the outer wall of the glass tube 111; when the sleeve 2 and the spoon handle 31 are provided in the glass tube 111, the sleeve 2 is elastically deformed, and the inner wall of the through hole 21 of the sleeve 2 is in contact with the outer wall of the glass tube 111 and the outer wall of the spoon handle 31.
In some embodiments of the present application, as shown in fig. 1 and 2, the tip 113 is disposed outside the sleeve 2, and the tip 113 and the spoon handle 31 are sequentially disposed in a direction away from the bottom end of the sleeve 2, so that the tip 113 and the spoon handle 31 are separated from each other in a direction along the central axis of the sleeve 2, and thus, a standard on the spoon handle 31 is not easily contacted with the tip 113, and the cleanliness of the tip 113 is ensured.
In some embodiments of the present application, as shown in fig. 1 and 2, the glass tube 111 comprises a tube body 1111 and an intermediate tube 1112, the intermediate tube 1112 is integrally provided on the tube body 1111, and the first solvent passage is provided on the tube body 1111;
the solvent on-off valve 12 is rotatably connected in the middle pipe 1112, and the inner wall of the middle pipe 1112 is abutted against the outer wall of the solvent on-off valve 12; the solvent on-off valve 12 is provided with a second solvent channel, and the second solvent channel is arranged corresponding to the first solvent channel, in other words, by rotating the solvent on-off valve 12, when the first solvent channel is communicated with the second solvent channel, the rubber head dropper 11 can suck or extrude the solvent; when the first solvent passage and the second solvent passage are dislocated from each other, the solvent above the solvent on-off valve 12 cannot be separated from the rubber-tipped dropper 11.
In some embodiments of the present application, as shown in fig. 1 and 2, the solvent shut-off valve 12 is made of glass to facilitate the user's observation of the flow of solute within the solvent shut-off valve 12.
In some embodiments of the present application, as shown in fig. 1 and 2, the outer sidewall of the glass tube 111 is provided with scales, so as to facilitate the measurement of the solution, and further facilitate the user to know the volume of the solution dropped into the volumetric flask 4.
In some embodiments of the present application, as shown in fig. 1 and 3, the volumetric flask 4 is detachably connected with a sealing plug 5 at its opening, in other words, in the constant volume process, after the user drops the solvent into the volumetric flask 4, the sealing plug 5 is plugged into the opening of the volumetric flask 4, and then the volumetric flask 4 is shaken, so that the solute can be dissolved.
In some embodiments of the present application, as shown in fig. 1 and 3, the top end of the volumetric flask 4 is connected with the flow guide member 6, and the flow guide member 6 is in a bowl shape, so that when the solution drops to the flow guide member 6, the solution flows along the inner wall of the flow guide member 6, the flowing speed of the solution is accelerated, and the solution is prevented from splashing.
In some embodiments of the present application, as shown in fig. 1 and 4, the standard solution preparing apparatus further includes a fixing base 7 for fixing the volumetric flask 4, a plurality of springs 8 are disposed at intervals on a top end of the fixing base 7, and a bottom of the volumetric flask 4 is clamped on the fixing base 7 by the springs 8, so that a user can select different springs 8 to clamp the volumetric flask 4 according to different sizes of the volumetric flask 4, thereby facilitating the fixing of the volumetric flask 4;
furthermore, when the bottom of the volumetric flask 4 is circular, the spring 8 has a clamping effect on the bottom of the volumetric flask 4, so that the volumetric flask 4 is fixed.
The utility model discloses standard solution prepares device can be arranged in the standard is solid or liquid, and when the standard was the solid, the preparation process of standard solution was:
s1, opening the solvent on-off valve 12, enabling the solvent to enter the rubber head dropper 11 through the rubber head dropper 11, and then closing the solvent on-off valve 12;
s2, placing the volumetric flask 4 on the fixed seat 7, then placing the fixed seat 7 on a balance, and enabling the balance to return to zero;
s3, weighing the standard substance through the sample weighing spoon body 3, pouring the standard substance into the volumetric flask 4, recording data displayed by the balance, taking out the fixed seat 7, and closing the balance;
s4, opening the solvent on-off valve 12, extruding the rubber head dropper 11, cleaning the symmetrical sample spoon body 3, and then closing the solvent on-off valve 12;
s5, the sleeve 2 and the sample weighing spoon body 3 are detached, the solvent on-off valve 12 is opened, the rubber head dropper 11 is squeezed, and the solvent is squeezed out of the volumetric flask 4;
s6, the closing plug 5 is inserted into the opening of the volumetric flask 4, and then the volumetric flask 4 is shaken so that the solute can be dissolved.
When the standard substance is liquid, the preparation process of the standard substance solution is as follows:
s1, opening the solvent on-off valve 12, enabling a first solvent to enter the rubber head dropper 11 through the rubber head dropper 11, and then closing the solvent on-off valve 12;
s2, placing the volumetric flask 4 on the fixed seat 7, opening the solvent on-off valve 12, and squeezing the rubber head dropper 11 to enable the first solvent to drip into the volumetric flask 4;
s3, opening the solvent on-off valve 12, extruding the rubber head dropper 11 to enable the second solvent to enter the rubber head dropper 11, and then closing the solvent on-off valve 12;
and S4, opening the solvent on-off valve 12, extruding the rubber head dropper 11 to enable the second solvent to enter the rubber head dropper 11, and then closing the solvent on-off valve 12 to complete the volume fixing process.
To sum up, the utility model provides a device is prepared to standard solution to reach the purpose of weighing process and constant volume process that reduces the loss of standard, simplifies the standard.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. A standard solution dispensing device, comprising:
the rubber head dropper assembly comprises a rubber head dropper and a solvent on-off valve, the rubber head dropper is provided with a first solvent channel, the solvent on-off valve is arranged on the rubber head dropper, and the solvent on-off valve is used for controlling the on-off of the first solvent channel;
the sleeve is provided with a through hole allowing the rubber head dropper to penetrate through, and the sleeve is arranged on the rubber head dropper;
the sample weighing spoon comprises a sample weighing spoon body and a sample weighing spoon head, wherein the sample weighing spoon body comprises a spoon handle and a spoon head, the spoon head is arranged at one end of the spoon handle, the spoon handle is connected with the sleeve, and the spoon head is arranged outside the sleeve;
the volumetric flask, the volumetric flask is equipped with one end open-ended cavity.
2. The standard solution dispensing apparatus of claim 1, wherein the sleeve is removably attached to the applicator dropper.
3. The device for preparing a standard solution according to claim 2, wherein the rubber-tipped dropper comprises a glass tube, a rubber head sleeved on the head of the glass tube, and a tip arranged on the tail of the glass tube, and the sleeve is an elastic member;
the inner side wall of the spoon handle is matched with the outer side wall of the glass tube, and the glass tube and the spoon handle are arranged in the through hole of the sleeve.
4. The standard solution preparing device of claim 3, wherein the tip is disposed outside the sleeve, and the tip and the spoon handle are sequentially disposed in a direction away from the bottom end of the sleeve.
5. The standard solution preparing device according to claim 3, wherein the glass tube includes a tube body and an intermediate tube, the intermediate tube is integrally provided on the tube body, and the first solvent passage is provided on the tube body;
the solvent on-off valve is rotatably connected in the middle pipe, and the inner wall of the middle pipe is abutted against the outer wall of the solvent on-off valve; the solvent on-off valve is provided with a second solvent channel corresponding to the first solvent channel.
6. The device for preparing a standard solution according to claim 3, wherein the outer side wall of the glass tube is provided with a scale.
7. The apparatus for dispensing a standard solution of claim 1 wherein the volumetric flask is removably attached at its mouth with a sealing plug.
8. The apparatus of claim 7, wherein the top end of the volumetric flask is connected to a flow guide member, the flow guide member being in the form of a bowl.
9. The apparatus of claim 1, further comprising a holder for holding the volumetric flask.
10. The apparatus as claimed in claim 9, wherein a plurality of springs are spaced apart from each other at the top of the holder, and the bottom of the volumetric flask is clamped to the holder by the springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022638052.5U CN214182956U (en) | 2020-11-13 | 2020-11-13 | Device is prepared to standard solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022638052.5U CN214182956U (en) | 2020-11-13 | 2020-11-13 | Device is prepared to standard solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214182956U true CN214182956U (en) | 2021-09-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022638052.5U Active CN214182956U (en) | 2020-11-13 | 2020-11-13 | Device is prepared to standard solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214182956U (en) |
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2020
- 2020-11-13 CN CN202022638052.5U patent/CN214182956U/en active Active
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