阅读说明：本技术 薄层微区流动富集系统的重金属快速测定方法 (Method for rapidly determining heavy metal of thin-layer micro-area flow enrichment system ) 是由 洪颖 陈建松 黄娟 王金陵 朱园园 田玲玲 唐晨 吴仰耘 钱斯 于 2020-05-18 设计创作，主要内容包括：本发明公开了一种薄层微区流动富集系统的重金属快速测定方法,所述薄层微区流动富集系统,包括平面卡片电极、薄层流通装置和控制平台；所述平面卡片电极的内部设有三个电极,三个电极分别为参比电极、工作电极和辅助电极,所述平面卡片电极右端设有用于密封卡片槽的密封板；所述控制平台包括与测量触点板对接的触点接头、加电控制模块、中央控制模块、数据制图模块、数据记录模块、数据计算模块和显示模块；本发明的参比电极为银-氯化银电极,工作电极为铋电极,辅助电极为金电极,这样避免了汞电极的使用对环境造成的污染；在测试过程中,先对待测溶液进行预电解,再进行溶出,这样缩短了富集时间,提高富集效率高。(The invention discloses a method for rapidly determining heavy metal in a thin-layer micro-area flow enrichment system, wherein the thin-layer micro-area flow enrichment system comprises a plane card electrode, a thin-layer circulation device and a control platform; the planar card electrode is internally provided with three electrodes which are respectively a reference electrode, a working electrode and an auxiliary electrode, and the right end of the planar card electrode is provided with a sealing plate for sealing the card slot; the control platform comprises a contact joint butted with the measuring contact plate, a power-on control module, a central control module, a data drawing module, a data recording module, a data calculating module and a display module; the reference electrode is a silver-silver chloride electrode, the working electrode is a bismuth electrode, and the auxiliary electrode is a gold electrode, so that the pollution of the mercury electrode to the environment is avoided; in the testing process, the solution to be tested is pre-electrolyzed and dissolved out, so that the enrichment time is shortened, and the enrichment efficiency is improved.)

1. A method for rapidly determining heavy metal of a thin-layer micro-area flow enrichment system is characterized by comprising the following steps:

the thin-layer micro-area flow enrichment system comprises a plane card electrode (6), a thin-layer flow device and a control platform, wherein the thin-layer flow device comprises a base body (1), a thin-layer pool (2) inside the base body (1) and a card groove (5) for inserting the plane card electrode (6), the thin-layer pool (2) is arranged in a saddle shape, and the upper ends of two sides of the thin-layer pool are respectively provided with a liquid inlet pipeline (3) and a liquid outlet pipeline (4);

the planar card electrode (6) is internally provided with three electrodes which are respectively a reference electrode (9), a working electrode (10) and an auxiliary electrode (11), the right end of the planar card electrode (6) is provided with a sealing plate (7) for sealing the card slot (5), the middle part of the right end of the sealing plate (7) is provided with a measuring contact plate (8), and leads (12) of the three electrodes are all arranged on the measuring contact plate (8);

the control platform comprises a contact joint (13) which is in butt joint with the measuring contact plate (8), a power-on control module (14), a central control module (15), a data drawing module (17), a data recording module (16), a data calculating module (18) and a display module (19);

the method for rapidly determining the heavy metal specifically comprises the following steps:

s1: the solution to be measured enters the thin layer pool (2) through the liquid inlet pipeline (3), the planar card electrode (6) is inserted into the card groove (5), so that the three electrodes are positioned in the thin layer pool (2), the solution to be measured submerges the three electrodes, waste liquid is discharged from the liquid outlet pipeline (4) through the liquid outlet pipeline, and the contact joint (13) is butted with the measuring contact plate (8);

s2: applying negative voltage between the reference electrode (9) and the working electrode (10) through the heating control module (14), starting pre-electrolysis to enrich heavy metal ions to be detected on the surface of the working electrode (10), and after the pre-electrolysis is finished, scanning the potential applied to the working electrode (10) from negative direction to positive direction through the heating control module (14) to dissolve out the heavy metal to be detected enriched on the working electrode (10);

s3: the current in a loop formed by the working electrode (10) and the auxiliary electrode (11) in the dissolution process is recorded through the data recording module (16), the potential of the working electrode (10) is recorded at the same time, a volt-ampere curve is obtained through the data drawing module (17), the peak current is obtained through the volt-ampere curve through the data calculating module (18), the concentration of the heavy metal in the solution to be detected is obtained through calculation, and the concentration of the heavy metal in the solution to be detected is displayed through the display module (19).

2. The method for rapidly measuring the heavy metal in the thin-layer micro-area flow enrichment system according to claim 1, which is characterized in that: all structural components of the thin-layer circulation device do not need any assembly process, and are integrally formed by photosensitive resin and formed by three-dimensional photocuring in the 3D printing process.

3. The method for rapidly measuring the heavy metal in the thin-layer micro-area flow enrichment system according to claim 1, which is characterized in that: the reference electrode (9) is a silver-silver chloride electrode, the working electrode (10) is a bismuth electrode, and the auxiliary electrode (11) is a gold electrode.

4. The method for rapidly measuring the heavy metal in the thin-layer micro-area flow enrichment system according to claim 1, which is characterized in that: the card slot is characterized in that the base body (1) is a cuboid made of transparent materials, the thin layer pool (2) is formed by a thin layer saddle-shaped cavity in the base body (1), the card slot (5) is a sheet-shaped groove parallel to the bottom surface of the base body (1), and the groove is communicated with the thin layer pool (2) from the outer wall of the base body (1).

5. The method for rapidly measuring the heavy metal in the thin-layer micro-area flow enrichment system according to claim 1, which is characterized in that: the heating control module (14) is respectively connected with the contact joint (13) and the central control module (15) in two directions, the central control module (15) is also respectively connected with the data drawing module (17), the data recording module (16) and the data calculating module (18) in two directions, and the display module (19) is connected with the central control module (15) in one direction.

6. The method for rapidly measuring the heavy metal in the thin-layer micro-area flow enrichment system according to claim 1, which is characterized in that: the central control module (15) is used for controlling the work of the data drawing module (17), the power-on control module (14), the data recording module (16), the data calculating module (18) and the display module (19).

Technical Field

The invention belongs to the technical field of heavy metal determination, and particularly relates to a method for rapidly determining heavy metal in a thin-layer micro-area flow enrichment system.

Background

The existing method for determining heavy metal in solution generally adopts electrodes containing mercury to carry out electrolysis, which is not beneficial to environmental protection, and cannot rapidly separate out heavy metal from the solution to be determined, and cannot rapidly dissolve out the heavy metal after separation, thereby reducing the efficiency of determining the heavy metal and failing to meet the requirements. Therefore, we propose a method for rapidly determining heavy metals in a thin-layer micro-zone flow enrichment system to solve the above-mentioned problems in the background art.

Disclosure of Invention

The invention aims to provide a method for rapidly determining heavy metal in a thin-layer micro-area flow enrichment system, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a method for rapidly determining heavy metal of a thin-layer micro-area flow enrichment system comprises a plane card electrode, a thin-layer flow device and a control platform, wherein the thin-layer flow device comprises a base body, a thin-layer pool in the base body and a card groove for inserting the plane card electrode, the thin-layer pool is arranged in a saddle shape, and the upper ends of two sides of the thin-layer pool are respectively provided with a liquid inlet pipeline and a liquid outlet pipeline;

the planar card electrode is internally provided with three electrodes which are respectively a reference electrode, a working electrode and an auxiliary electrode, the right end of the planar card electrode is provided with a sealing plate for sealing a card slot, the middle part of the right end of the sealing plate is provided with a measuring contact plate, and leads of the three electrodes are all arranged on the measuring contact plate;

the control platform comprises a contact joint butted with the measuring contact plate, a power-on control module, a central control module, a data drawing module, a data recording module, a data calculating module and a display module;

the method for rapidly determining the heavy metal specifically comprises the following steps:

s1: the solution to be measured enters the thin layer pool through the liquid inlet pipeline, the planar card electrode is inserted into the card groove, so that the three electrodes are positioned in the thin layer pool, the solution to be measured submerges the three electrodes, waste liquid is discharged from the liquid outlet pipeline through the liquid outlet pipeline, and the contact joint is butted with the measuring contact plate;

s2: applying negative voltage between the reference electrode and the working electrode through the heating control module, starting pre-electrolysis to enrich heavy metal ions to be detected on the surface of the working electrode, and scanning the potential applied to the working electrode from negative direction to positive direction through the heating control module after the pre-electrolysis is finished to dissolve out the heavy metal to be detected enriched on the working electrode;

s3: the current in a loop formed by the working electrode and the auxiliary electrode in the dissolving-out process is recorded through the data recording module, the potential of the working electrode is recorded at the same time, a volt-ampere curve is obtained through the data drawing module, the peak current is obtained through the volt-ampere curve through the data calculating module, the concentration of the heavy metal in the solution to be detected is obtained through calculation, and the concentration of the heavy metal in the solution to be detected is displayed through the display module.

Preferably, all structural components of the thin-layer flow device do not need any assembly process, and are integrally formed by photosensitive resin and formed by three-dimensional photocuring in the D printing process.

Preferably, the reference electrode is a silver-silver chloride electrode, the working electrode is a bismuth electrode, and the auxiliary electrode is a gold electrode.

Preferably, the substrate is a cuboid made of transparent materials, the thin layer pool is formed by a thin layer saddle-shaped cavity in the substrate, the card slot is a sheet-shaped groove parallel to the bottom surface of the substrate, and the groove is communicated with the thin layer pool from the outer wall of the substrate.

Preferably, the power-on control module is respectively connected with the contact joint and the central control module in a bidirectional mode, the central control module is also respectively connected with the data drawing module, the data recording module and the data calculating module in a bidirectional mode, and the display module is connected with the central control module in a unidirectional mode.

Preferably, the central control module is used for controlling the work of the data drawing module, the heating control module, the data recording module, the data calculating module and the display module.

Compared with the prior art, the invention has the beneficial effects that: the invention provides a method for rapidly determining heavy metal in a thin-layer micro-area flow enrichment system, wherein three electrodes are respectively a reference electrode, a working electrode and an auxiliary electrode, the reference electrode is a silver-silver chloride electrode, the working electrode is a bismuth electrode, and the auxiliary electrode is a gold electrode, so that the pollution of the mercury electrode to the environment is avoided;

in the testing process, the solution to be tested is pre-electrolyzed, so that heavy metal ions in the solution are reduced and separated out to be metal which is enriched on the surface of the working electrode, and then the metal is dissolved out, so that the heavy metal to be tested which is deposited on the surface of the working electrode is oxidized to be ions which are dissolved out, thereby shortening the enrichment time and improving the enrichment efficiency;

through the setting of control platform, obtain the volt-ampere curve through the data drawing module, the data calculation module obtains peak current through this volt-ampere curve to calculate and obtain the heavy metal concentration in the solution that awaits measuring, show the heavy metal concentration in this solution that awaits measuring through the display module simultaneously, make the survey of heavy metal more quick like this, more directly perceived, more intelligent.

Drawings

FIG. 1 is an exploded view of a planar card electrode and thin layer flow device according to the present invention;

FIG. 2 is a schematic view of a planar card electrode structure according to the present invention;

FIG. 3 is a schematic view of the mounting structure of the planar card electrode and thin-layer flow device of the present invention;

FIG. 4 is a schematic diagram of a control platform according to the present invention.

In the figure: the device comprises a base body 1, a thin-layer pool 2, a liquid inlet pipeline 3, a liquid outlet pipeline 4, a card slot 5, a plane card electrode 6, a sealing plate 7, a measuring contact plate 8, a reference electrode 9, a working electrode 10, an auxiliary electrode 11, a lead wire 12, a contact joint 13, a heating control module 14, a central control module 15, a data recording module 16, a data drawing module 17, a data calculation module 18 and a display module 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.