Hong Kong’s high-rise buildings are one of the main culprits of air pollution in Hong Kong. However as Hong Kong police launch tear gas on a nightly basis, the residual cy will remain in the air long enough that people would inhale it on the streets when they head out for work on weekdays? A network reporter confirmed on-site that the concentration of air in the mountain was 12.1ppm. If inhaled for 30 minutes, it can cause long-term illness.
The reporter of Heung Shing Education TV took a machine to the demonstration sites to test cyniade and released four clips to show its measurement results. The Yamaha machine used in the fragment is the Portable Single Gas Detector – Hydrogen Cyanide HCN version produced by BW Gas Alert Extreme. This machine used can test the concentration of 0-30ppm (parts per million). Cyanide is poisonous. According to the channel report, the first piece of measured data is 5.0ppm instead of the staff misreading 50ppm. The channel said that this is a problem with the reporter’s protective equipment, and there is sweating affecting the line of sight. The measured number of the third segment is 12.1 ppm. Ppm is parts per million, which is a measure of the concentration of smog. The reporter of this media watched the clip, but the actual number was not seen because of the shaking of the mirror item, but the third paragraph clearly showed that it was a double digit, and the channel claimed that 12.1 was difficult to report large numbers.
This test was taken outside the Sogo Department Store in Wan Chai and reported 5.0 ppm.
Test 2 was taken outside 298 Computer City, Wan Chai
Test 3 is taken outside the Wanchai oil station at a concentration of 12.1 ppm.
The cyanide mist is a colorless or white gas. Inhalation will weaken the oxygen function of the cells, and excessive inhalation will suffocate and die. According to the occupational hygiene standards promulgated by the Hong Kong Labour Department, the upper limit of potassium cyanide (Shan Kwai) is 5 ppm, which is 12.1 ppm measured by Heung Shing Education TV and more than double the standard. Safety industry sources said that inhaling the concentration of 12.0ppm in the mountain can last for more than 30 minutes, which can result in long-term illness.
According to Acute Exposure Guideline Levels for Selected Airborne Chemicals: Volume 2, published by National Academies Press, if it is in the concentration of 8.0 ppm of sulphuric acid mist for one hour, it will cause mild headache. The article cites a study in 1931 that humans die within 90 seconds at a concentration of 500-625 ppm and die at a concentration of 450 ppm for 6 minutes. Inhalation concentration greater than 25ppm within one hour may cause paralysis, dizziness, weakness, nausea, and rapid pulse. People with inhaled concentrations greater than 10 ppm will experience weakness, headache, affecting smell and taste, irritating throat, vomiting, and difficulty breathing.
According to the reporter of the channel, he was transferred to Percival Street in Lantern Street, Causeway Bay, and towed a fainting colleague to rescue the mountaineering alarm in his pocket. As a result, everyone can’t stand the poisonous fog, and they have to go out for help. Fortunately, the alarm sound from the cyanide testing machine has caught the attention of passers-by who assisted in rescuing others. In addition, the machine was able to detect cyanide levels while the machine was inside the bag – which proves that cyanide levels within surrounding environment is exceeding the standard.
Cyanide was used in gas chambers by Nazis during World War II, and was also used in the war in northern Iraq in the 1980s. The OPCW has included hydrogen cyanide (HCN) in the Schedule 3 list of Annex on Chemicals.-------------------------------------------------
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