CN220473373U - Liquid sample injection device for infrared spectrometer attenuated total reflection accessory - Google Patents

Abstract

The utility model discloses a liquid sample injection device for an attenuated total reflection accessory of an infrared spectrometer, which belongs to the field of infrared detection and comprises a connecting seat, a liquid bin and a positioning plate, wherein the positioning plate is connected to the inner wall of the connecting seat, and the lower end of the liquid bin passes through the positioning plate. The utility model realizes the purpose of testing the liquid sample, especially the liquid sample containing the organic volatile solvent in a closed environment, and effectively reduces the sample dosage and avoids the possible volatilization of the organic solvent in the using process.

Description

Liquid sample injection device for infrared spectrometer attenuated total reflection accessory

Technical Field

The utility model relates to the field of infrared detection, in particular to a liquid sample injection device for an attenuated total reflection accessory of an infrared spectrometer.

Background

An infrared spectrum attenuated total reflection Accessory (ATR) (such as ATR model: pike zinc selenide single-point ATR attenuated total reflection crystal) is commonly used for testing a block, a film, a liquid and the like, a sample to be tested is placed on the crystal before the ATR accessory is tested (such as a measuring probe 1 of a measuring table in FIG. 1, one half of the measuring probe 1 is positioned in the measuring table, the other half of the measuring probe extends out of the measuring table, the table wall of the measuring table is in an external thread form), then the test is started, and when a beam of infrared light enters another optical medium from one optical medium at a certain incident angle, if the beam enters the optical-sparse medium from the optical-dense medium, and the incident angle is larger than a critical angle (the critical angle is the incident angle when the refraction angle is equal to 90 °). Attenuated total reflection does not require acquisition of a signal transmitted through the sample, but rather obtains spectral information of the surface layer components of the sample from the reflected signal at the surface of the sample.

When the existing infrared spectrum attenuated total reflection Accessory (ATR) is used for testing a solid sample, the sample is attached to the crystal by applying force because the crystal is protruded outwards, and then the test is carried out. When used to test liquid samples, the following drawbacks exist:

1. the low-viscosity liquid sample flows away after being added dropwise, and is separated from the crystal, so that an accurate test result cannot be obtained, and the low-viscosity liquid sample cannot be tested;

2. the sample is exposed to air, and the solvent is extremely volatile, so that the test result is affected. For example, when the content of the silicone oil dissolved in the chloroform is quantitatively detected by an infrared spectrum attenuation total reflection method, the chloroform is toxic and is easy to volatilize, on one hand, the concentration change is large due to volatilization, so that the result is inaccurate to measure, and on the other hand, the indoor environment is very polluted, and the personnel are injured;

3. the sample dosage is large, a large amount of sample (usually more than 5 ml) is required to be dripped for rapid test based on the characteristic of crystal convex, the sample is not friendly to high-value samples, and the solvent dosage is also large during cleaning.

Disclosure of Invention

In order to solve the problems, the utility model provides the liquid sample injection device for the infrared spectrometer attenuated total reflection accessory, which realizes the purpose of testing a liquid sample, especially a liquid sample containing an organic volatile solvent in a closed environment, effectively reduces the sample consumption in the use process and avoids possible volatilization of the organic solvent.

The liquid sample injection device for the infrared spectrometer attenuated total reflection accessory comprises a connecting seat, a liquid bin and a positioning plate, wherein the positioning plate is connected to the inner wall of the connecting seat, and the lower end of the liquid bin penetrates through the positioning plate.

Optionally, a positioning hole for passing through the liquid bin is formed in the center of the positioning plate.

Optionally, the positioning plate is further provided with more than one observation hole.

Optionally, the positioning plate is made of a transparent material.

Optionally, a lightening hole is formed in the wall at the bottom of the connecting seat.

Optionally, the cavity wall of the liquid bin encloses a liquid cavity, and a sealing cover is arranged on the liquid bin.

Optionally, the outer side wall of the liquid bin is connected with a liquid inlet pipe and a liquid discharge pipe, the cavity wall of the liquid bin is provided with a liquid inlet channel communicated with the liquid inlet pipe, the cavity wall of the liquid bin is also provided with a liquid discharge channel communicated with the liquid discharge pipe, and the liquid inlet channel and the liquid discharge channel are respectively communicated with the liquid cavity.

Optionally, the liquid inlet channel is communicated with the bottom of the liquid cavity, and the liquid outlet channel is communicated with the bottom of the liquid cavity.

Optionally, the liquid cavity is narrow at the bottom and wide at the top.

Optionally, an air release hole is formed in the sealing cover.

Optionally, the liquid sample injection device for the infrared spectrometer attenuated total reflection accessory further comprises a fixing component, and the fixing component is installed on the connecting seat.

Optionally, the liquid sample injection device for the infrared spectrometer attenuated total reflection accessory further comprises a sealing ring, and the sealing ring is positioned at the bottom of the liquid bin.

Optionally, the fixed component includes bracing piece, connecting plate and gland nut, and bracing piece one end is connected with the connecting plate, and gland nut passes the connecting plate, and the bracing piece other end is connected on the connecting seat, and gland nut's lower extreme is located the top in liquid storehouse.

Compared with the prior art, the utility model has the beneficial effects that:

the liquid sample injection device for the infrared spectrometer attenuated total reflection accessory is beneficial to the external thread wall of the original detection table of the infrared spectrometer attenuated total reflection detection accessory, and is matched with the infrared spectrometer attenuated total reflection detection accessory for use, so that the purpose of testing a liquid sample, especially a liquid sample containing an organic volatile solvent in a closed environment is realized, the using amount of the sample is effectively reduced, and the possible volatilization of the organic solvent is avoided in the using process.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of a background art structure of the present utility model;

FIG. 2 is a schematic diagram of the overall structure of the present utility model;

FIG. 3 is a schematic diagram of a connection structure of a connection base and a positioning plate according to the present utility model;

FIG. 4 is a schematic view of another connecting structure of the connecting seat and the positioning plate according to the present utility model;

FIG. 5 is a schematic view of the structure of the liquid cartridge of the present utility model;

FIG. 6 is a schematic cross-sectional view of FIG. 5;

FIG. 7 is a bottom view schematic of FIG. 5;

FIG. 8 is a schematic view of the structure of the fixing member of the present utility model;

fig. 9 is a bottom view schematic of fig. 1.

Reference numerals illustrate: 1. the measuring probe comprises a measuring probe body, 2, a connecting seat, 3, a liquid bin, 4, a locating plate, 5, a locating hole, 6, an observation hole, 7, a lightening hole, 8, a liquid cavity, 9, a sealing cover, 10, a liquid inlet pipe, 11, a liquid outlet pipe, 12, a liquid inlet channel, 13, a liquid outlet channel, 14, a degassing hole, 15, a fixing member, 16, a supporting rod, 17, a connecting plate, 18, a compression nut, 19 and a sealing ring.

Detailed Description

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, indirectly connected through an intermediary, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, the meaning of "a plurality" is two or more, unless specifically stated otherwise.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The technical scheme of the utility model is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

Referring to fig. 2, fig. 2 is a schematic diagram of the whole structure of a liquid sample injection device for an attenuated total reflection accessory of an infrared spectrometer.

The utility model provides an infrared spectrometer decay liquid sampling device for total reflection annex, includes connecting seat 2, liquid storehouse 3 and locating plate 4, and locating plate 4 connects on the inner wall of connecting seat 2, and locating plate 4 is passed to the lower extreme in liquid storehouse 3.

The liquid bin 3 may be provided to be detachable. Before detection, the connecting seat 2 is connected to the infrared spectrometer attenuated total reflection accessory, then the lower end of the liquid bin 3 passes through the positioning plate 4, then a liquid sample to be detected is introduced into the liquid bin 3, detection can be carried out, and during detection, the upper half part of the measuring probe is positioned in liquid in the liquid bin 3.

The connecting seat 2 is connected to the infrared spectrometer attenuated total reflection accessory in a connecting mode, and can be provided with internal threads on the inner wall at the bottom of the connecting seat 2 and in threaded connection with external threads of the Pike zinc selenide single-point ATR attenuated total reflection crystal test stand. Other connection modes such as quick-release pressing plates, bolt locking and the like can be adopted to adapt to various types of attenuated total reflection accessories on the market.

According to the utility model, the purpose of testing the liquid sample, especially the liquid sample containing the organic volatile solvent, in a closed environment is realized through the connecting seat 2, the liquid bin 3 and the positioning plate 4, the sample consumption is effectively reduced in the use process, and the possible volatilization of the organic solvent is avoided.

Referring to fig. 3-4, fig. 3 is a schematic diagram of a connection structure of a connection base and a positioning plate according to the present utility model, and fig. 4 is a schematic diagram of a connection structure of another connection base and a positioning plate according to the present utility model.

In one or more embodiments of the present utility model, a positioning hole 5 for passing the liquid bin 3 is formed at the center of the positioning plate 4, and the size of the positioning hole 5 is matched with the size of the liquid bin 3.

In one or more embodiments of the present utility model, the positioning plate 4 is further provided with more than one observation hole 6, where the observation hole 6 is used for observing whether leakage occurs.

In one or more embodiments of the present utility model, the positioning plate 4 is made of a transparent material for the convenience of observation.

In one or more embodiments of the present utility model, the wall at the bottom of the connecting seat 2 is provided with a lightening hole 7, and the lightening hole 7 can discharge the liquid leaked from the liquid bin 3 carelessly in addition to lightening the weight of the connecting seat 2.

Referring to fig. 5-7, fig. 5 is a schematic view of the structure of the liquid cartridge of the present utility model, fig. 6 is a schematic view of the cross-section of fig. 5, and fig. 7 is a schematic view of the bottom of fig. 5.

In one or more embodiments of the utility model, the walls of the liquid compartment 3 enclose a liquid chamber 8, and the liquid compartment 3 is provided with a sealing cover 9.

In one or more embodiments of the present utility model, the outer side wall of the liquid bin 3 is connected with a liquid inlet pipe 10 and a liquid outlet pipe 11, a liquid inlet channel 12 communicated with the liquid inlet pipe 10 is formed on the cavity wall of the liquid bin 3, a liquid outlet channel 13 communicated with the liquid outlet pipe 11 is also formed on the cavity wall of the liquid bin 3, and the liquid inlet channel 12 and the liquid outlet channel 13 are respectively communicated with the liquid cavity 8. The liquid inlet pipe 10 and the liquid outlet pipe 11 can be welded on the outer wall of the liquid bin 3, or can be connected on the outer wall of the liquid bin 3 in other modes such as a threaded connection mode.

In one or more embodiments of the utility model, the liquid chamber 8 is narrow at the bottom and wide at the top. The liquid cavity 8 with the narrow lower part and the wide upper part greatly reduces the consumption of a test sample (the consumption of the actual measurement sample can be as low as 0.3ml, which is reduced by an order of magnitude compared with the prior art), and the test of different response samples is considered.

In one or more embodiments of the present utility model, the liquid inlet channel 12 is designed to sample at the bottom (i.e. the bottom is communicated with the liquid chamber 8), and the liquid outlet channel 13 is designed to drain liquid at the bottom (i.e. the bottom is communicated with the liquid chamber 8), so that the dosage of the test sample can be ensured to be low, the bubbles generated by sample injection can be reduced, liquid can be drained rapidly, the residue of the sample in the test crystal can be reduced, and the cleaning is convenient.

In one or more embodiments of the present utility model, the liquid bin 3 is designed with a corrosion resistant material that ensures the organic solvent tolerance of the system.

In one or more embodiments of the present utility model, the sealing cover 9 is provided with a degassing hole 14, and the degassing hole 14 can effectively eliminate sample injection bubbles, so as to ensure the test accuracy.

Referring again to fig. 1, in one or more embodiments of the present utility model, the liquid sampling device for an infrared spectrometer attenuated total reflection accessory further includes a fixing member 15, where the fixing member 15 is mounted on the connection base 2 for fixing the liquid bin 3.

Referring to fig. 8, fig. 8 is a schematic structural view of a fixing member according to the present utility model.

In one or more embodiments of the present utility model, the fixing member 15 includes a support rod 16, a connection plate 17, and a compression nut 18, one end of the support rod 16 is connected to the connection plate 17, the compression nut 18 passes through the connection plate 17, the other end of the support rod 16 is connected to the connection seat 2, and the lower end of the compression nut is located above the liquid bin 3. When the liquid bin 3 is installed, the compression nut is rotated, so that the lower end of the compression nut is compressed with the top surface of the liquid bin 3, the bottom of the liquid bin 3 is attached to a test table surface beside the measuring probe 1, and the measuring probe 1 is located at the center of the liquid cavity 8.

The connection of the support rod 16 and the connecting plate 17 can be threaded connection, quick-release pressing plate connection, bolt locking and the like.

Referring to fig. 9 and referring again to fig. 1, fig. 9 is a bottom view of fig. 1.

In one or more embodiments of the present utility model, the liquid sample injection device for the infrared spectrometer attenuated total reflection accessory further comprises a sealing ring 19, wherein the sealing ring 19 is positioned at the bottom of the liquid bin 3. The sealing ring 19 prevents liquid leakage, can effectively prevent liquid from volatilizing, guarantees the test accuracy, has promoted the feature of environmental protection. The sealing ring 19 is preferably an O-ring.

When in use, the fixing member is connected to an Attenuated Total Reflection (ATR) accessory through the connecting seat 2 in a threaded manner, the liquid bin 3 is placed on the measuring probe 1, the measuring probe 1 is positioned at the center of the bottom of the liquid cavity 8, the liquid bin 3 is fixed by rotating the compression nut 18, the liquid inlet pipe 10 and the liquid outlet pipe 11 of the liquid bin 3 are respectively connected to a liquid flow controller (not shown in the figure), meanwhile, the sample pipe on the liquid flow controller is connected to a sample (or blank solution) to be sucked, and the liquid outlet pipe on the liquid flow controller is connected to a liquid waste bottle. When the device is used, the flow rate (total amount) of the liquid inlet is set, the solution to be detected is sucked by the controller, the infrared spectrum data acquisition is carried out, and after the acquisition is completed, the liquid is discharged and cleaned by the controller, so that the rapid sample injection, the rapid cleaning and the closed operation are realized.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The liquid sample injection device for the infrared spectrometer attenuated total reflection accessory is characterized by comprising a connecting seat (2), a liquid bin (3) and a positioning plate (4), wherein the positioning plate (4) is connected to the inner wall of the connecting seat (2), and the lower end of the liquid bin (3) penetrates through the positioning plate (4).

2. The liquid sample injection device for the infrared spectrometer attenuated total reflection accessory according to claim 1, wherein a positioning hole (5) for passing through the liquid bin (3) is formed in the center position of the positioning plate (4).

3. The liquid sample injection device for the infrared spectrometer attenuated total reflection accessory according to claim 2, wherein the positioning plate (4) is also provided with at least one observation hole (6);

or/and (or)

The positioning plate (4) is made of transparent material.

4. The liquid sample injection device for the infrared spectrometer attenuated total reflection accessory according to claim 1, wherein a weight reducing hole (7) is formed in the wall at the bottom of the connecting seat (2).

5. The liquid sampling device for the infrared spectrometer attenuated total reflection accessory according to claim 1, wherein the cavity wall of the liquid bin (3) encloses a liquid cavity (8), and a sealing cover (9) is arranged on the liquid bin (3).

6. The liquid sampling device for the infrared spectrometer attenuated total reflection accessory according to claim 5, wherein the outer side wall of the liquid bin (3) is connected with a liquid inlet pipe (10) and a liquid outlet pipe (11), a liquid inlet channel (12) communicated with the liquid inlet pipe (10) is formed in the cavity wall of the liquid bin (3), a liquid outlet channel (13) communicated with the liquid outlet pipe (11) is further formed in the cavity wall of the liquid bin (3), and the liquid inlet channel (12) and the liquid outlet channel (13) are respectively communicated with the liquid cavity (8).

7. The liquid sample injection device for the infrared spectrometer attenuated total reflection accessory according to claim 6, wherein the liquid inlet channel (12) is communicated with the bottom of the liquid cavity (8), and the liquid discharge channel (13) is communicated with the bottom of the liquid cavity (8).

8. The liquid sample injection device for the infrared spectrometer attenuated total reflection accessory according to any one of claims 5 to 6, wherein the liquid cavity (8) is narrow at the bottom and wide at the top; or/and (or)

And the sealing cover (9) is provided with a degassing hole (14).

9. The liquid sample injection device for the infrared spectrometer attenuated total reflection accessory according to claim 1, wherein the liquid sample injection device for the infrared spectrometer attenuated total reflection accessory further comprises a fixing member (15), and the fixing member (15) is installed on the connecting seat (2); or/and (or)

The liquid sample injection device for the infrared spectrometer attenuated total reflection accessory further comprises a sealing ring (19), and the sealing ring (19) is positioned at the bottom of the liquid bin (3).

10. The liquid sampling device for the infrared spectrometer attenuated total reflection accessory according to claim 9, wherein the fixing member (15) comprises a supporting rod (16), a connecting plate (17) and a compression nut (18), one end of the supporting rod (16) is connected with the connecting plate (17), the compression nut (18) penetrates through the connecting plate (17), the other end of the supporting rod (16) is connected to the connecting seat (2), and the lower end of the compression nut is located above the liquid bin (3).