CN203275352U - Heavy metal ion detector - Google Patents

Abstract

The utility model relates to a heavy metal ion detector. The heavy metal ion detector includes: a microprocessor and a memory and a display connected to the microprocessor; also includes: a constant potential source; an ammeter connected in series with the constant potential source; an analog-to-digital converter connected to the ammeter connected, and connected to the microprocessor; heavy metal ion test paper, which includes a substrate and a working electrode and a counter electrode arranged on the substrate; during detection, the working electrode and the counter electrode are respectively connected to the constant potential source at both ends. Compared with the prior art, the heavy metal ion detector provided by the utility model is combined with the heavy metal ion test paper used in the heavy metal ion tester, which can conduct preliminary detection of the heavy metal content of the water quality anytime and anywhere, and only needs to change one sheet each time it is used Test paper, easy to use and low cost.

Description

A heavy metal ion detector

technical field

The utility model relates to the field of environmental water quality detection, in particular to a heavy metal ion detector. the

Background technique

The pollution of heavy metals to water bodies is becoming more and more serious. In the field of heavy metal ion detection in water quality, large-scale instruments are usually used, such as heavy metal electrochemical analyzers, ICP-AES, ICP-MS, etc. The price of these equipment is as high as hundreds of thousands to several million It is expensive, and the operation is complex, requiring professional testing, and can only be run in a specific laboratory. If the general public wants to know information about heavy metal pollution in local water, they can only submit it for inspection, which is expensive and the inspection cycle is very long. the

Utility model content

In order to solve the above problems, the utility model provides a heavy metal ion detector, which is characterized in that it includes a microprocessor and a memory and a display connected to the microprocessor;

Also includes:

Constant potential source;

An ammeter is connected in series with the constant potential source;

an analog-to-digital converter connected to the ammeter and connected to the microprocessor;

Heavy metal ion test paper, which includes a substrate and a working electrode and a counter electrode arranged on the substrate;

During detection, the working electrode and the counter electrode are respectively connected to two ends of the constant potential source. the

Further, the heavy metal ion detector also includes: an operational amplifier connected to the ammeter and connected to the analog-to-digital converter. the

Further, the heavy metal ion test paper also includes:

a reference electrode disposed on the substrate;

During detection, the reference electrode and the counter electrode are connected to the same end of the constant potential source. the

Further, the working electrode contains bismuth. the

Compared with the prior art, the heavy metal ion detector provided by the utility model is combined with the heavy metal ion test paper used in the heavy metal ion tester, which can conduct preliminary detection of the heavy metal content of the water quality anytime and anywhere, and only needs to change one sheet each time it is used Test paper, easy to use and low cost. the

Description of drawings

Fig. 1: the heavy metal ion tester schematic diagram that embodiment one provides;

Fig. 2: the heavy metal ion test paper schematic diagram that embodiment two provides;

Figure 3: A schematic diagram of the connection between the heavy metal ion detector provided in Example 3 and the heavy metal ion test paper. the

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, not to limit the utility model. the

As shown in Figure 1, embodiment one provides a kind of heavy metal ion detector, comprising:

Microprocessor 1 and memory 2 and display 3 connected with microprocessor 1;

Also includes:

Constant potential source 4;

Ammeter 5 is connected in series with constant potential source 4;

An analog-to-digital converter 6 , which is connected to the ammeter 5 via an operational amplifier 7 and to the microprocessor 1 . the

As shown in Figure 2, embodiment two provides a kind of heavy metal ion test paper supporting with above-mentioned heavy metal ion detector, it is characterized in that, comprises:

Substrate 8;

A working electrode 9 , a counter electrode 10 , and a reference electrode 11 are arranged on the substrate 8 . the

The working electrode 9 is made of bismuth-containing material, which has low toxicity, excellent electrochemical performance and simple preparation method, and is used to replace the traditional mercury electrode in electroanalytical chemistry. the

As shown in Figure 3, when the heavy metal ion test paper was inserted into the heavy metal ion detector, the working electrode 9 was connected to one end of the constant potential source 4 through the ammeter 5, and the counter electrode 10 and the reference electrode 11 were connected to the end of the constant potential source 4. another side. the

The following describes the process of heavy metal ion detection using the above heavy metal ion detector and heavy metal ion test paper:

Turn on the heavy metal ion detector, insert a new heavy metal ion test paper, draw a certain amount of water sample, the constant potential source 4 sets the working voltage of the working electrode 9 to a certain value (such as -1.0V), and maintain it for a certain period of time (such as 100 seconds), so that the ions to be measured are deposited on the surface of the working electrode 9, and then a certain voltage value is set according to the target detection ions (such as setting -0.6V to measure lead), so that the ions to be measured deposited on the working electrode 9 are stripped out , the stripping current is detected by the ammeter 5, and converted into a digital signal by the analog-to-digital converter 6 and sent to the microprocessor 1, and the microprocessor 1 converts it into a concentration value and outputs it to the display 3. the

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models. the

Claims (4)

1. a detection of heavy metal ion instrument, is characterized in that, comprises microprocessor and the storer and the display that are connected with this microprocessor;

Also comprise:

The constant potential source;

Reometer, source-series with described constant potential;

Analog to digital converter, it is connected with described reometer, and is connected to described microprocessor;

The heavy metal ion test paper, it comprise substrate and be arranged on this substrate working electrode and to electrode;

During detection, described working electrode and the described two ends that electrode connected respectively described constant potential source.

2. detection of heavy metal ion instrument as claimed in claim 1, is characterized in that, also comprises: operational amplifier, it is connected with described reometer, and is connected to described analog to digital converter.

3. detection of heavy metal ion instrument as claimed in claim 1, is characterized in that, described heavy metal ion test paper also comprises:

Be arranged at the contrast electrode on described substrate;

During detection, described contrast electrode and the described same end that electrode is connected to described constant potential source.

4. detection of heavy metal ion instrument as claimed in claim 1, is characterized in that, described working electrode contains bismuth.

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