Why can mercury measure body temperature Can you measure body temperature with a mercury thermometer

In fact, the temperature of very many liquids can be measured.

Because mercury has a high boiling point and is not easy to volatile, mercury is selected as the content of a general thermometer.

OK. Mercury is a chemical element, commonly known as mercury. Mercury is the only metal that exists in a liquid state at room temperature and pressure. Melting point, boiling point, density grams of cubic centimeters.

The cohesion is very strong, stable in the air, and mercury vapor evaporates at room temperature, and the vapor is highly toxic. Mercury is slightly soluble in water and increases in solubility in the presence of air. Mercury is a silvery-white, shiny, heavy liquid with stable chemical properties that are insoluble and insoluble in either acids or alkalis.

If you hold the triangular shape of the thermometer horizontally and move it horizontally to the eye and slowly rotate it to see if there is a small thin line inside, it will show how many degrees.

When you look at it, put the thermometer that has been measured for 5 minutes flat in front of your eyes, and see that the scale of the mercury column points to several large scales, 35-39, and there are 10 units with millimeters as the dividing line in the middle, for example, it belongs to low fever, which belongs to normal body temperature, and higher than 39-40 belongs to high fever and ultra-high fever.

There are three ways to use a mercury thermometer, the most commonly used is to measure the temperature under the armpits, but also to measure the temperature in the mouth and in the rectum. Rectal temperature measurement is mainly used for uncooperative infants and young children, who sweat a lot under their armpits, are not clamped tightly, and do not cooperate, which can easily lead to body temperature distortion. The temperature measurement in the oral cavity is worried about poisoning after the mercury breaks, so the most commonly used is the intraanal temperature measurement.

The mercury column is very thin, and the thermometer has a cylindrical magnifying glass, which is used to magnify the mercury column.

A mercury thermometer, a type of thermometer, is made of glass with a column of mercury that rises with body temperature. Mercury thermometers are widely used in the medical field and in ordinary households, and mercury thermometers are available in some pharmacies.

A mercury thermometer contains about 1 gram of mercury. When broken, all the mercury evaporated, bringing the concentration of mercury in the air to 22 in a room 15 square meters in size and 3 meters in height2 mg cubic meters.

China stipulates that the maximum allowable concentration of mercury in indoor air is 001 mg cubic meter. It is generally accepted that mercury poisoning can quickly occur in an environment with milligram concentrations of mercury in an environment of milligram cubic meters.

As a heavy metal, mercury is highly toxic. Feng Xinbin, deputy director of the State Key Laboratory of Environmental Geochemistry at the Institute of Geochemistry of the Chinese Academy of Sciences, said that once mercury vapor is inhaled, it will enter various organs and tissues of the human body through blood circulation, and can also pass through the blood-brain barrier, damaging the central nervous system.

Mercury is converted into methylmercury when it enters the water body, which is particularly harmful to developing fetuses and infants. In addition, methylmercury can also accumulate in animals and humans as the food chain rises, thus threatening the health of humans around the world.

axillary measurements; Before measuring the temperature, wipe the armpits dry with a dry towel, and then put the mercury end of the thermometer in the depths of the armpits without being exposed.

intraoral measurements; The method is to place the end of the mercury on the surface of the mouth obliquely under the child's tongue, tell the child to close his mouth (do not bite with teeth), breathe through his nose, and take it out after 3 minutes.