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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 |
