Portable mercury analyzer

A portable mercury analyzer is a highly sensitive atomic absorption spectrometer used for measuring mercury. The mercury anomaly in the air above some metal deposits is often as low as several to tens of nanograms per cubic meter.

A portable mercury analyzer is a highly sensitive atomic absorption spectrometer used for measuring mercury. The mercury anomaly in the air above some metal deposits is often as low as several to tens of nanograms per cubic meter. The original methods for measuring mercury were unable to detect this weak anomaly. It is designed to utilize the strong absorption of 253.7 nanometer spectral lines by mercury vapor. The instrument mainly includes a mercury lamp emitting 253.7 nanometer spectral lines, a gas absorption chamber, and photoelectric amplification and measurement devices. If the gas sample entering the absorption chamber contains trace mercury, the light passing through the absorption chamber will be weakened due to partial absorption by mercury. The mercury content in gas can be measured based on the degree of light attenuation. Due to significant absorption of spectral lines near 253.7nm by sulfur dioxide and many rare gases, serious interference occurs. Suitable for environmental monitoring, hygiene and epidemic prevention, tap water, chemical industry and other industries to measure the mercury content in water, air, soil, food, cosmetics, chemical raw materials, etc.

The general testing process is as follows: after a certain treatment of the water sample, stannous chloride (SnCl2) is added to reduce the mercury ions in the water sample to elemental mercury. Mercury vapor is introduced into the absorption cell using a carrier gas (such as air), and the intensity of ultraviolet light in the absorption cell is detected using a photoelectric tube. The generated photoelectric signal is converted, amplified, and processed to output to a digital display or recorder, thereby achieving analysis and testing of the mercury content in the sample.

Therefore, the monitoring of mercury has received great attention from the country, and the analysis methods for trace mercury are constantly improving. The requirements for mercury measuring instruments are also increasing. Therefore, portable mercury measuring instruments are manufactured based on the original products, greatly improving drift and noise, increasing sensitivity and accuracy, and having digital retention function.

And according to practical requirements, instruments for continuous measurement of mercury have been developed for installation in cars and airplanes, as well as portable backpack type mercury measuring instruments that can be used for on-site measurement. Its sensitivity can reach 1 nanogram per cubic meter. It is designed to utilize the strong absorption of 253.7 nanometer spectral lines by mercury vapor.

It can measure mercury pollution with low levels, such as mercury anomalies in the air above some metal deposits, which are often as low as a few to tens of nanograms per cubic meter. Various existing mercury measurement methods cannot detect such weak anomalies, but its sensitivity can reach 1 nanogram per cubic meter. The portable mercury analyzer mainly includes a mercury lamp that emits 253.7 nanometer spectral lines, a gas absorption chamber, and photoelectric amplification and measurement devices. If the gas sample entering the absorption chamber contains trace mercury, the light passing through the absorption chamber will be weakened due to partial absorption by mercury. The mercury content in gas can be measured based on the degree of light attenuation.