Operation video

30 tests / 190￥/per set

A simple device for measuring mercury concentration in the air

1 Scope of application: This device can quickly and accurately determine whether the mercury concentration in indoor air exceeds the standard. For example, detecting whether the mercury content in indoor air exceeds the standard after laboratory mercury leaks, mercury thermometers, and blood pressure monitors are damaged. Gas extraction takes about 1 hour, with a detection limit of 0.003mg and a linear range of 0.01-1.0mg mercury/cubic meter.

2. Detection significance: Some reports suggest that acute poisoning can be caused when the mercury concentration is above 1.2mg per cubic meter. Mercury slowly evaporates at room temperature and can form toxic amounts of mercury in enclosed rooms. It is extremely important to remove residual mercury, ventilate extensively, and determine whether the mercury concentration in the environment exceeds the standard.

3. Equipment configuration: Micro air pump, power adapter, folding plug (holding test paper and intake end), hose (exhaust pipe), plastic box (fixing device) form a mercury measuring device, 1 bottle of test paper, 1 pair of tweezers, and 1 control color card.

4 Testing steps:

4.1 Close doors and windows for at least 1 hour before testing;

4.2 Remove the test paper bottle, tweezers, and power adapter from the plastic box and connect them according to the video image;

4.3 Open the folding plug embedded in the box cover;

4.4 Use tweezers to remove one piece of test paper from the test paper bottle, place it on the circular hole of the folding stopper, press the lid and hear a clicking sound. If it cannot be fastened tightly, a small piece of ordinary paper can be inserted into the slot;

4.5 Place the mercury measuring device in the area where mercury is spilled or in different parts of the room, place the hose straight or vertically, turn on the power to start timing, and turn off the power when the air pump has been working for 56 minutes (nearly 1 hour);

4.6 Take out the test paper and compare the colored side of the test paper with the control color card. Find the same or similar color level on the color card, and the value marked next to the color level is the mercury concentration in the air. If it is greater than 0.01mg, it exceeds the limit value. If the color development is not obvious, you can compare an unused test strip to see if there is any color development on the test strip.

5 Explanation

5.1 The plastic box used in this device serves as a support and storage. During transportation, there may be a phenomenon of the air pump connection falling off. Before use, perform a repositioning process according to the image.

5.2 The test paper is sensitive to mercury vapor color. The test paper does not show color when directly inserted into a mercury droplet. This method is a rapid on-site detection method, and accurate quantification should be based on the national prescribed methods.

5.3 The test paper contains trace amounts of cuprous iodide. There is literature indicating that 'cuprous iodide can be used as an animal feed additive and a source of iodine in iodized salts. Pure product ingestion is harmful and may cause skin allergies, etc.'. The content in the test paper is very low and usually does not cause harm to the human body. For those who are prone to allergies or pregnant women, it is recommended to use tweezers to pick up and place the test paper. The remaining test materials can be disposed of as normal waste.

5.4 The validity period of the test paper can be found on the bottle label. After opening the bottle, be sure to tighten the cap to prevent mercury vapor from entering and causing the test paper to change color.

Produced by Beijing Shian Xunda Technology Co., Ltd., China

E-mail：bjzw@vip.163.com