KR101590851B1 - Collection device for chemical subtance - Google Patents

Abstract

The present invention relates to a portable chemical substance collecting apparatus, which comprises a body having an inlet pipe and a discharge pipe through which a liquid sample flows in and out, a body disposed in the body, and a liquid sample contained in the liquid sample flowing through the inlet pipe A connecting member for connecting the first portion of the cartridge to the inlet pipe, an inner pipe connected to the discharge pipe and a second portion of the cartridge, and a length adjustable connection member And a metering pump disposed on the inner pipe for sucking the liquid sample to allow the analyte to be concentrated in the adsorbent cartridge.

Description

{COLLECTION DEVICE FOR CHEMICAL SUBTANCE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical collecting apparatus, and more particularly, to an apparatus for collecting and collecting trace amounts of chemical substances contained in a liquid sample using a cartridge at a collecting site.

Analysis of the chemicals contained in the water is important for checking pollution of lakes, rivers, oceans, etc. and studying the underwater environment. For this purpose, water is taken from the field to a laboratory where analysis is possible. In laboratories, various analytical instruments are used for analysis. There is a limit to the concentration that the analytical instrument can detect.

A concentration step of the sample is required to analyze the substance at the concentration below the detection limit of the analytical instrument. As a method of concentrating the collected water, a method of removing water by applying heat may be used, and in the case of an organic material in which the object is well dissolved in an organic solvent, there is a method of using an extraction method. Removing water by applying heat is time-consuming and can lead to the loss of low-boiling chemicals and is not suitable for materials that are deformed by heat.

To improve this, there is a method of concentrating water below the boiling point of water using decompression, but also loss of low boiling point material can not be avoided. Extraction method using organic solvent requires additional work such as addition of dry substance, filtration and concentration of organic solvent in order to remove residual water in organic solvent by applying organic solvent, and it is applied to substances which are more soluble in water than organic solvent There is a problem that can not be done.

On the other hand, solid phase extraction (SPE), which removes interfering substances by using activated carbon, ion exchange resins, and other adsorbents, is widely used as a pretreatment method for analyzing chemical substances in water samples. This method uses a cartridge filled with activated carbon, ion exchange resin, and adsorbents to adsorb chemical substances in a water sample, and then pretreats using difference in desorption properties depending on the solvent. Solid phase extraction is usually used in passive methods, but techniques for extracting under the same conditions using a vacuum pump have been performed when evaluating the relative extraction ability under uniform conditions.

However, there is still a difficulty in collecting excess water samples for the analysis of trace amounts of chemicals at the sites such as lakes, rivers, and oceans and transporting them to the laboratories.

DISCLOSURE Technical Problem Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to solve the problems such as transportation cost and limitation of collected samples generated when water to be analyzed is collected and transported, And concentrating a small amount of the analyte in the cartridge through solid-phase extraction using a metering pump in the field, thereby facilitating collection, concentration and transfer of the liquid sample.

According to an embodiment of the present invention, a portable chemical substance collecting apparatus includes a body having an inlet pipe and an outlet pipe through which a liquid sample enters and exits, a chemical substance disposed in the body and contained in a liquid sample flowing through the inlet pipe A connecting member for connecting the first portion of the cartridge to the inlet pipe, a connecting portion for connecting the inner pipe connected to the discharge pipe to the second portion of the cartridge, And a metering pump disposed on the pipe for sucking the liquid sample to allow the analyte to be concentrated in the adsorbent cartridge.

According to an embodiment of the present invention, the connecting member has a plurality of pipes having different diameters, and is formed stepwise so that the diameter of the plurality of pipes becomes more protruded.

According to an embodiment of the present invention, the cartridge is coupled to the outer circumference of any one of the plurality of pipes.

According to an embodiment of the present invention, the connection mechanism includes an insertion pipe movable in close contact with the inside of the internal pipe, and a spring formed on a part of an outer periphery of the insertion pipe, And a head portion having an outer diameter larger than the diameter of the spring is formed.

According to an embodiment of the present invention, the inside of the upper end of the head portion is formed in a shape corresponding to the second portion of the cartridge.

According to an embodiment of the present invention, a gasket is provided between the inner pipe and the insertion pipe.

According to an embodiment of the present invention, the gasket is characterized by being made of rubber, metal or plastic.

According to an embodiment of the present invention, the apparatus may further include a flow meter installed on the inner pipe and a display connected to the flow meter by a lead wire to display information.

According to an embodiment of the present invention, a knob is provided on one side of the body to facilitate transportation.

According to an embodiment of the present invention, the power source for driving the metering pump may be a DC power source of 3 to 24 V and an AC power source of 100 to 340 V.

According to one embodiment of the present invention, the adsorbent usable in the cartridge is selected from the group consisting of activated carbon, zeolite, a porous metal organic framework (MOF), an ion exchange resin, It can be more than one.

According to one embodiment of the present invention, instead of collecting and transporting a large amount of water such as a river or a lake, only the concentrated cartridge is taken, so that more samples can be collected and the cost of transportation can be reduced .

In addition, it is possible to prevent the loss of low boiling point substances in the laboratory for analysis in the laboratory, and it is possible to recover substances that can not be extracted by dissolving in water more than organic solvents, and the amount of the solvent used when extracting from the cartridges is small There is an advantage that the step of preprocessing is simple.

Further, according to the apparatus of the embodiment of the present invention, since it can be used by being moved or fixed in the field, it can be usefully used for continuously analyzing chemicals in the water.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic external perspective view of a chemical collection device in accordance with an embodiment of the present invention.
2 is an internal perspective view of a chemical substance collecting apparatus according to an embodiment of the present invention;
Figures 3a and 3b are a front view and a plan view of a connecting member according to an embodiment of the present invention;
4 is a cross-sectional view of a cartridge according to one embodiment of the present invention.
5 is a cross-sectional view of a connection mechanism coupled to an internal piping in accordance with an embodiment of the present invention.
6 is a partially enlarged view of A in Fig.
7A and 7B are cross-sectional views of a connecting mechanism that varies according to the length of the cartridge in accordance with one embodiment of the present invention.

Hereinafter, a portable chemical substance collecting apparatus according to the present invention will be described in detail with reference to the drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

1 is a schematic perspective view of a chemical collecting apparatus 100 according to an embodiment of the present invention. FIG. 2 is an internal perspective view of a chemical collecting apparatus 100 according to an embodiment of the present invention. 1 and 2, a chemical collecting apparatus 100 according to an embodiment of the present invention includes a body 120 having an inlet pipe 131 and an outlet pipe 132 through which a liquid sample enters and exits, Shaped adsorbent cartridge 170 disposed in the inlet tube 131 and concentrating the chemicals contained in the liquid sample flowing through the inlet tube 131, and a first portion (upper portion) of the cartridge 170 and an inlet tube 162, 163, and 164 having different diameters are formed so as to protrude as the diameters of the connecting members 160 are smaller.

The portable chemical substance collecting apparatus 100 according to an embodiment of the present invention includes a connection pipe 135 connecting an internal pipe 135 connected to the discharge pipe 132 and a connection portion (179), and a metering pump (190) disposed on the inner pipe (135) for sucking the liquid sample and concentrating the liquid sample on the adsorption cartridge (170).

At this time, the cartridge 170 is coupled to the outer circumference 161a, 162a, 163a, 164a of the plurality of pipes 161, 162, 163, 5 is a cross-sectional view of a connection mechanism coupled to an internal piping according to an embodiment of the present invention. Referring to FIG. 5, the connection mechanism 179 includes a movable insert And a spring 177 formed on a part of the outer periphery of the insertion pipe 178 and one end of the insertion pipe 178 is connected to the spring 177 so as to be seated on the spring 177. [ And a head portion 176 having an outer diameter larger than the diameter.

 The inside of the head portion 176 is formed in a shape corresponding to the second portion (lower end portion) of the cartridge 170. 4 is a cross-sectional view of a cartridge 170 according to an embodiment of the present invention. The cartridge 170 has a hollow cylindrical tube 172 having a diameter D1, an interior of which is filled with an adsorbent 175, And one end has a projection 173 protruding outward. At this time, as shown in FIG. 6, the diameter of the connecting member 160 coupled with the cartridge 170 becomes D2, where D1 and D2 are the same. The protrusion 173 allows the cartridge 170 to have a vertical portion 173a and a horizontal portion 173b.

5, the connecting portion 179 includes a vertical portion 176a corresponding to the vertical portion 173a and the horizontal portion 173b of the cartridge 170, And a portion 176b. Whereby the cartridge 170 can be easily coupled to the head portion 176 of the connection mechanism 179. [

In addition, in an embodiment of the present invention, a handle 110 may be formed on the outside of the body 120 so that the door can be easily moved to the site, and a hinged door 140 for exchanging the cartridge 170 Is formed on the outside of the body (120). Further, a flow meter 180 capable of measuring the amount of flowing water is formed on the inner pipe 135, and a display 150 indicating the amount of water measured through the flow meter 180 is connected to the outside of the body 120 .

According to an embodiment of the present invention, a DC power source of 3 to 24 V and an AC power source of 100 to 340 V can be used.

Hereinafter, the configuration of the portable chemical substance collecting apparatus 100 according to an embodiment of the present invention will be described in more detail.

The device 100 is a device for concentrating chemicals in a water sample at the site of sample collection, which requires the convenience of transportation during transport. Therefore, the handle 110 can be mounted on the upper part to facilitate transportation in the field, and the handle 110 can be folded after transportation.

The apparatus 100 is a device for concentrating a substance to be analyzed in a cartridge 170 of a small size by collecting water at the site, adsorbing a desired chemical substance to the cartridge 170 and discharging unnecessary water again, And an outlet pipe 132 for discharging the water that has passed through the inlet pipe 131 and the cartridge 170.

Water can be introduced into the apparatus through the inflow pipe 131 by the metering pump 190 and an adsorption cartridge 170 capable of concentrating the chemical substance to be analyzed can be mounted on one side of the inflow pipe 131 . At this time, the inflow pipe 131 may be made of metal or plastic.

In one embodiment of the present invention, the adsorbent 175 of the adsorption cartridge 170 may include activated carbon, zeolite, a porous metal organic framework (MOF), an ion exchange resin selectively adsorbing an ionic material, And an optional inorganic substance adsorbent material used for the extraction.

At this time, the size of the cartridge 170 that can be used can be 1 to 100 ml of the cartridge 170, and the connection member 160 for connecting the cartridge 170 and the tube for connecting the cartridges 170 of various diameters, (161a, 162a, 163a, 164a, see Fig. 3a) of various sizes that are configured in a stepped manner.

In addition, according to an embodiment of the present invention, a link mechanism 179 whose length can be adjusted to enable connection of cartridges 170 having various lengths is included. 5, a connection mechanism 179 according to an embodiment of the present invention is configured such that an insertion piping 178 movable in close contact with the inside of the internal piping 135 is positioned and can be moved The spring 177 exposed to the outside of the insertion pipe 178 is enclosed so that the insertion pipe 178 is brought into close contact with the suction cartridge 170. The connection portion of the insertion pipe 178 with the cartridge 170, So as to push the portion 176.

7A and 7B are sectional views of a connection mechanism 179 according to the length of the cartridge 170 according to an embodiment of the present invention. When the length of the cartridge 170 is short as shown in FIG. 7A, When the length L1 is long and the length of the cartridge 170 is long as shown in FIG. 7B, the spring 177 is compressed and the length L1 becomes short. In this way, the cartridge 170 can be connected to the internal pipe 135 regardless of the length of the cartridge 170. [

The gasket 180 is disposed between the inner pipe 135 and the inserting pipe 178 to prevent water from leaking out of the device. The material of the gasket 180 is rubber, plastic, or metal It is possible.

The chemical substance collecting apparatus 100 according to an embodiment of the present invention includes a hinged door 140 so as to separate the cartridge 170 from the apparatus in which the chemical substance in the water sample has been collected from the apparatus and mount a new cartridge 170 And includes a handle 142 for convenience in opening and closing.

The apparatus includes a flow meter 180 for determining the amount of water used in the sample collection to calculate the concentration of the analyte in the collected water and includes a display 150 for indicating the amount of water used in the sample collection, Device.

A DC power source of 3 to 24 V for use by moving to a power source device (not shown) for operating the metering pump 190 attached to the apparatus, and a power source device capable of AC power source of 100 to 340 V for fixed use And mobile power sources include commercial batteries and built-in batteries.

Hereinafter, embodiments of the present invention will be described in more detail.

<Examples>

100 ml of a sample of 10 ppm aqueous solution of diethyl methylphosphonate, acetic acid, 1,2-dipropanol and triethanolamine was taken and the activated carbon cartridge was mounted and the metering pump was operated for 5 minutes And the corresponding substances were adsorbed on the cartridge. After removing the cartridge, it was extracted with 1 ml of 0.2N HCl methanol solution, and then nitrogen was blown out to concentrate it to 100 μl. Then, 100 μl of BSTFA was added. After GC derivation reaction at 60 ° C. for 30 minutes, GC-MS analysis was performed.

&Lt; Comparative Example 1 &

Water was removed from 100 ml of the above 10 ppb aqueous solution at 5 mbar and 60 ° C for 20 minutes using a vacuum condenser. After removing the water, collect the analytes with 10 ml of dichloromethane in a flask, blow with nitrogen, concentrate to 100 μl, and add 100 μl of BSTFA. After derivatization at 60 ° C for 30 minutes, GC-MS Analysis.

&Lt; Comparative Example 2 &

100 ml of the above 10 ppb aqueous solution was extracted with 50 ml of methylene chloride using a separating funnel. The extracted methylene chloride solution was subjected to filtering after removing water using magnesium sulfate. The filtered solution is slowly concentrated to 10 ml with a vacuum concentrator for 15 minutes. 10 ml of the solution was purged with nitrogen, concentrated to 100 μl, and 100 μl of BSTFA was added. After the derivatization reaction at 60 ° C. for 30 minutes, GC-MS analysis was carried out, and the results are shown in Table 2 below.

<Table 1> Experimental Conditions> Example Comparative Example 1 Comparative Example 2 Concentration time 5 minutes 20 minutes (pure water concentration time) 15 minutes (excluding extraction time) Amount of solution used 0.2 N HCl Methanol 1 ml Dichloromethane 10ml Dichloromethane 50ml Nitrogen enrichment 1 ml → 100 μl 10 ml → 100 μl 10 ml → 100 μl

<Table 2> GC-MS analysis peak height> Example Comparative Example 1 Comparative Example 2 Diethyl methylphosphonate 400,000 0 200,000 Acetic acid 1,100,000 1,200,000 0 1,2-Dipropanol 800,000 750,000 0 Triethanolamine 1,300,000 1,100,000 0

The above-described portable chemical collecting apparatuses are not limited in the configuration and the method of the above-described embodiments, but the embodiments may be modified such that all or some of the embodiments are selectively combined .

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention .

Claims (11)

A body having an inlet pipe and a discharge pipe through which the liquid sample enters and exits;
A pipe-shaped adsorbent cartridge disposed in the body and concentrating the chemical contained in the liquid sample introduced through the inlet pipe;
A connecting member connecting the first portion of the cartridge and the inflow pipe;
A connection mechanism connecting the inner pipe connected to the discharge pipe and the second portion of the cartridge and having a length adjustable; And
And a metering pump disposed on the inner pipe for sucking the liquid sample to allow the analyte to be concentrated in the adsorbent cartridge,
Wherein the connecting member has a plurality of pipes having different diameters and is formed so as to protrude more as the diameter of the plurality of pipes becomes smaller, and the adsorbent cartridge is coupled to make contact with the outer circumference of any one of the plurality of pipes ,
The connecting mechanism includes:
An insertion pipe movable in close contact with the inside of the inner pipe; And
And a spring formed on an outer periphery of the insertion pipe,
Wherein the end of the insertion pipe includes a head portion having an outer diameter larger than the diameter of the spring, one end of the spring is hooked to an end of the inner pipe, the other end is hooked to the head portion, Which is located on the outer circumferential surface,
Wherein the cartridge is formed with a protrusion having a vertical portion and a horizontal portion, and the head portion has a vertical portion and a horizontal portion corresponding to the vertical portion and the horizontal portion, and is coupled to the protruding portion. delete delete delete The method according to claim 1,
Wherein the inside of the upper end of the head portion is formed in a shape corresponding to the second portion of the cartridge. The method according to claim 1,
And a gasket is provided between the inner pipe and the inserting pipe. The method according to claim 6,
Wherein the gasket is made of rubber, metal or plastic. The method according to claim 6,
A flow meter installed on the internal piping, and a display connected to the flow meter by a lead wire to display information. The method according to claim 1,
Wherein a handle is provided on one side of the body so as to facilitate transportation. The method according to claim 1,
Wherein the power source for driving the metering pump is a DC power source of 3 to 24 V and an AC power source of 100 to 340 V. The method according to claim 1,
Wherein the adsorbent usable in the cartridge is at least one selected from the group consisting of activated carbon, zeolite, a porous metal organic framework (MOF), an ion exchange resin, and an optional inorganic substance adsorbent material. Device.

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