CN110542738A - nondestructive extraction method and device for ions in solution - Google Patents

Abstract

The invention discloses a nondestructive extraction method and a nondestructive extraction device for ions in a solution, wherein the extraction method comprises the following steps: respectively placing the sample and the extracting solution in a quantitative water tank; starting a liquid peristaltic circulating pump; when a sample flows through the conductivity on-line monitoring controller, detecting the charge concentration in the sample to determine the working voltage of the electrode, wherein the voltage can be preset as a fixed value; the sample flows through the extraction device, anions and cations in the sample respectively penetrate through the anion exchange membrane and the cation exchange membrane to enter the anion extract flow channel and the cation extract flow channel under the action of an electric field, and due to the effect of the bipolar membrane, the anions and the cations in the anion extract flow channel and the cation extract flow channel respectively exist in corresponding acid-base situations, after flowing through the extraction device, the acid-base neutralization is changed into the existence of the anion and the cation situations in the sample again, then the current flows through the electric conduction on-line monitoring controller to ensure that the ion extraction is finished, and finally the ion extraction is carried by the quantitative water tank, and the extraction process is finished; the method and the device realize automatic ion extraction.

Description

Nondestructive extraction method and device for ions in solution

Technical Field

The invention relates to a solution extraction method and a realization device, in particular to a method for extracting anions and cations in a solution from an original solution by ensuring that the chemical properties of the anions and the cations are unchanged, and a realization device of the method.

Background

The sample analyzed in the ion chromatography industry must be a water-soluble sample without particles, macromolecular organic matters and heavy metal elements, otherwise, a pipeline can be blocked, the pollution of an analytical column is caused, the column efficiency of a light analytical column is reduced, the analytical result is inaccurate, and the heavy analytical column is scrapped to influence the detection work. The cost of a single analytical column ranges from thousands to tens of thousands of yuan, which is a wonder result of the loss caused by improper processing of the sample to be tested.

At present, a plurality of methods for sample injection pretreatment are available, including physical methods such as filtration and adsorption, chemical methods such as precipitation and extraction column filtration, instrument methods such as column switching and an British blue ultrafiltration technology; the physical and chemical method has great defects, the outstanding method is manual operation, the process is complicated, and the required auxiliary equipment and consumed materials are too many; the instrument method as the middle column switching technology is the technology of American Saimei Fei company, the England technology is the technology of Switzerland Vantone company, and the obvious problem is that the use cost is too high; the problem solved by the Sammerfet column switching technology is that a large amount of matrixes are removed but not filtered, and consumables required by the Sammerfet column switching technology are chromatographic columns and are high in cost; the Wantong British blue technology can play a role in filtering and removing impurities, but due to the principle of membrane filtration, a membrane needs to be replaced manually, and frequent and accurate replacement of a built-in membrane is not a simple work for a high-pressure sealing member; under the background of the industry, a method for reducing the use cost and improving the automation degree of sample pretreatment is urgently needed to expand the application range of the ion chromatograph. Therefore, an extraction method and an implementation device with low cost and high automation degree of sample pretreatment are the problems to be solved urgently in society.

disclosure of Invention

The invention aims to solve the technical problems of high cost, manual operation, complex working procedures, too much consumed materials and the like in the prior art.

in order to solve the technical problems, the technical scheme provided by the invention is as follows: the utility model provides a method and device are drawed to ion harmless in solution, includes electrode, circulation passageway, diaphragm, the electrode includes negative pole electrode and anode electrode, the circulation passageway includes first electrolyte circulation passageway, second electrolyte circulation passageway, anion extract circulation passageway, sample circulation passageway and cation extract circulation passageway, the diaphragm includes first bipolar diaphragm, second bipolar diaphragm, anion exchange diaphragm, cation exchange diaphragm, extraction element has set gradually anode electrode, first electrolyte circulation passageway, first bipolar diaphragm, anion extract circulation passageway, anion exchange diaphragm, sample circulation passageway, cation exchange diaphragm, second bipolar diaphragm, second electrolyte circulation passageway and cathode electrode from left to right.

Furthermore, the device for realizing the extraction method further comprises an extracting solution quantitative water tank, a liquid peristaltic circulating pump, an electric conductivity on-line monitoring controller and an electrolyte containing container, wherein the quantitative water tank comprises a sample quantitative water tank, an extracting solution quantitative water tank and a sample containing quantitative water tank after the circulation is finished, the liquid peristaltic circulating pump comprises a first liquid peristaltic circulating pump and a second liquid peristaltic circulating pump, and the electric conductivity on-line monitoring monitor comprises a first electric conductivity on-line monitoring controller and a second electric conductivity on-line monitoring controller.

Further, the extraction method comprises the following steps:

(1) Respectively placing a sample and an extracting solution in a quantitative water tank for containing the sample and an electrolyte containing container;

(2) Starting a liquid peristaltic circulating pump;

(3) when a sample flows through the conductivity on-line monitoring controller, detecting the charge concentration in the sample to determine the working voltage of the electrode, wherein the voltage can be preset as a fixed value;

(4) The sample flows through the extraction device, anions and cations in the sample respectively penetrate through the anion exchange membrane and the cation exchange membrane to enter the anion extracting solution flow channel and the cation extracting solution flow channel under the action of an electric field, and due to the effect of the bipolar membrane, the anions and the cations in the anion extracting solution flow channel and the cation extracting solution flow channel respectively exist in corresponding acid-base situations, after the anions and the cations flow through the extraction device, the acid-base neutralization is changed into the existence of the anion and the cation situations in the sample again, the current flows through the electric conduction on-line monitoring controller to ensure that the ion extraction is finished, and finally the ions are carried by the quantitative water tank, so that the.

compared with the prior art, the invention has the advantages that: the invention can ensure that ions are completely extracted from a sample to an extracting solution and the concentration is unchanged through a quantitative water tank and a conductivity online monitoring controller; the design of isolating the electrode electrolyte flow channel from the extracting solution flow channel in the core device avoids the material denaturation and the change of ion concentration caused by the discharge effect of an ion electrode in the extracting solution; the use of the conductive filling material overcomes the defect of larger membrane resistance; only the ion components in the sample are extracted, so that the effects of purifying the sample and separating the ions from substances such as impurity organic matrixes and the like are realized; the method and the device can automatically complete sample ion extraction, and have no manual consumption and consumable consumption; especially, the method has great significance as a pretreatment method of complex samples detected by an ion chromatograph, and has the additional benefit of simply and quickly preparing high-purity diluted acid diluted alkali and saving the cost for a laboratory.

drawings

FIG. 1 is a block diagram of a non-destructive extraction core device for ions in solution;

FIG. 2 is a block diagram of an apparatus for the non-destructive extraction of ions from a solution;

As shown in the figure: 1. an electrode, 2, a flow channel, 3, a diaphragm, 4, a cathode electrode, 5, an anode electrode, 6, a first electrolyte flow channel, 7, a second electrolyte flow channel, 8, an anion extraction liquid flow channel, 9, a sample flow channel, 10, a cation extraction liquid flow channel, 11, a first bipolar diaphragm, 12, a second bipolar diaphragm, 13, anion exchange diaphragm, 14, cation exchange diaphragm, 15, extract quantitative water tank, 16, liquid peristaltic circulating pump, 17, electric conduction on-line monitoring controller, 18, electrolyte container, 19, take over circulation end back sample quantitative water tank, 20, extract quantitative water tank, 21, contain sample quantitative water tank, 22, first liquid peristaltic circulating pump, 23, second liquid peristaltic circulating pump, 24, first electric conduction on-line monitoring controller, 25, second electric conduction on-line monitoring controller.

Detailed Description

the present invention will be described in further detail with reference to the accompanying drawings.

The present invention will be described in detail with reference to the accompanying drawings.

The invention provides a method and a device for nondestructively extracting ions in solution in specific implementation, which comprises an electrode 1, a flow channel 2 and a diaphragm 3, the electrode 1 comprises a cathode electrode 4 and an anode electrode 5, the flow channel 2 comprises a first electrolyte flow channel 6, a second electrolyte flow channel 7, an anion extracting solution flow channel 8, a sample flow channel 9 and a cation extracting solution flow channel 10, the separator 3 includes a first bipolar separator 11, a second bipolar separator 12, an anion exchange separator 13, a cation exchange separator 14, the extraction device is sequentially provided with an anode electrode 5, a first electrolyte circulation channel 6, a first bipolar diaphragm 11, an anion extracting solution circulation channel 8, an anion exchange diaphragm 13, a sample circulation channel 9, a cation exchange diaphragm 14, a second bipolar diaphragm 12, a second electrolyte circulation channel 7 and a cathode electrode 4 from left to right; the device for realizing the extraction method also comprises an extracting solution quantitative water tank 15, a liquid peristaltic circulating pump 16 and an electric conduction on-line monitoring controller 17;

The extraction method comprises the following steps:

(1) Respectively placing the sample and the extracting solution in a quantitative water tank 21 for containing the sample and an electrolyte containing container 18;

(2) starting the first liquid peristaltic circulating pump 22 and the second liquid peristaltic circulating pump 23;

(3) when the sample flows through the first conductivity on-line monitoring controller 24, the working voltage of the electrode is detected and determined according to the concentration of the charges in the sample, and the voltage can be preset to be a fixed value;

(4) the sample flows through the extraction device, anions and cations in the sample respectively penetrate through the anion exchange membrane 13 and the cation exchange membrane 14 to enter the anion extracting solution flowing channel 8 and the cation extracting solution flowing channel 10 under the action of an electric field, and due to the effect of the bipolar membranes, the anions and the cations in the anion extracting solution flowing channel 8 and the cation extracting solution flowing channel 10 respectively exist in corresponding acid-base situations, after flowing through the extraction device, acid-base neutralization is changed into the anion and cation situations in the sample again, the anion and cation situations flow through the second conductivity online monitoring controller 25 to ensure that ion extraction is completed, and finally the ion extraction is carried by the quantitative water tank, so that the extraction process is finished.

the invention can ensure that ions are completely extracted from a sample to an extracting solution and the concentration is unchanged through the quantitative water tank 15 and the conductivity on-line monitoring controller 17; the design of isolating the electrode electrolyte flow channel from the extracting solution flow channel in the core device avoids the material denaturation and the change of ion concentration caused by the discharge effect of an ion electrode in the extracting solution; the use of the conductive filling material overcomes the defect of larger membrane resistance; only the ion components in the sample are extracted, so that the effects of purifying the sample and separating the ions from substances such as impurity organic matrixes and the like are realized; the method and the device can automatically complete sample ion extraction, and have no manual consumption and consumable consumption; especially, the method has great significance as a pretreatment method of complex samples detected by an ion chromatograph, and has the additional benefit of simply and quickly preparing high-purity diluted acid diluted alkali and saving the cost for a laboratory

the present invention and its embodiments have been described above, but the description is not limitative, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. A method and a device for nondestructively extracting ions in solution comprise an electrode (1), a flow channel (2) and a diaphragm (3), and are characterized in that: the electrode (1) comprises a cathode electrode (4) and an anode electrode (5), the flow channel (2) comprises a first electrolyte flow channel (6), a second electrolyte flow channel (7), an anion extracting solution flow channel (8), a sample flow channel (9) and a cation extracting solution flow channel (10), the membrane (3) comprises a first bipolar membrane (11), a second bipolar membrane (12), an anion exchange membrane (13) and a cation exchange membrane (14), the extraction device is sequentially provided with an anode electrode (5), a first electrolyte circulation channel (6), a first bipolar diaphragm (11), an anion extracting solution circulation channel (8), an anion exchange diaphragm (13), a sample circulation channel (9), a cation exchange diaphragm (14), a second bipolar diaphragm (12), a second electrolyte circulation channel (7) and a cathode electrode (4) from left to right.

2. the method and the device for the nondestructive extraction of ions in solution according to claim 1, wherein: the device for realizing the extraction method further comprises a quantitative water tank (15), a liquid peristaltic circulating pump (16), an on-line conductivity monitoring controller (17) and an electrolyte containing container (18), wherein the quantitative water tank (15) comprises a quantitative sample water tank (19), a quantitative extract water tank (20) and a quantitative sample containing water tank (21) after circulation is finished, the liquid peristaltic circulating pump (16) comprises a first liquid peristaltic circulating pump (22) and a second liquid peristaltic circulating pump (23), and the on-line conductivity monitoring controller (17) comprises a first on-line conductivity monitoring controller (24) and a second on-line conductivity monitoring controller (25).

3. The method and the device for the nondestructive extraction of ions in solution according to claim 1, wherein: the extraction method comprises the following steps:

(1) Respectively placing the sample and the extracting solution in a quantitative water tank (21) for containing the sample and an electrolyte containing container (18);

(2) Starting a peristaltic liquid circulation pump (16);

(3) When a sample flows through the conductivity on-line monitoring controller (17), detecting the charge concentration in the sample to determine the working voltage of the electrode, wherein the voltage can be preset as a fixed value;

(4) The sample flows through the extraction device, anion and cation in the sample respectively permeate through the anion exchange membrane (13) under the action of an electric field, the cation exchange membrane (14) enters the anion extracting solution circulation channel (8) and the cation extracting solution circulation channel (10), and due to the effect of the bipolar membrane, the anion extracting solution circulation channel (8) and the cation and cation in the cation extracting solution circulation channel (10) respectively exist in corresponding acid-base situations, after the sample flows through the extraction device, acid-base neutralization and re-formation are carried out on the anion and cation situations in the sample, and the ion extraction is ensured to be completed through the on-line conductivity monitoring controller (17) after the sample flows through the on-line conductivity monitoring controller, and finally the sample is received by the quantitative.

4. The method and the device for the nondestructive extraction of ions in solution according to claim 1, wherein: and conductive materials are filled in the first electrolyte circulation channel (6) and the second electrolyte circulation channel (7).