Your Cart

Method for Detecting Carbon Dioxide in Air

Carbon dioxide has long been recognized as a colorless, odorless gas. It is heavier than air and its gas density is 1.9659 / L under standard conditions. Carbon dioxide in the atmosphere comes from: fuel combustion, such as boilers, civilian furnaces and other coal, oil, wood fired when burning carbon dioxide; engine exhaust contains high concentrations of carbon dioxide; biological breathing (including humans, animals, plants) produces carbon dioxide Wait. The carbon dioxide content in human exhaled breath is as high as 4%, and the photosynthesis of green leaf plants in the sun can absorb carbon dioxide in the air, thereby maintaining the carbon dioxide concentration in the air in nature.

It has been seen through the auxiliary detection of the air temperature and humidity recorder that the places and conditions where carbon dioxide exists are different, for example: the content in the atmosphere is relatively constant and the concentration is very low. The indoor concentration varies depending on people’s activities and is generally below 0.3%. The concentration in the exhaled breath is relatively high, and at the same time, the concentration in the exhaust gas of the engine with high humidity is high, and the temperature is also high. In the industrial production process, with different process conditions, the concentration and coexisting gases will have a larger range of change. Therefore, when selecting a measurement method, it must be comprehensively considered according to the application conditions and the characteristics of the method to achieve accurate results and convenient operation. There are several common methods for measuring carbon dioxide gas.

  1. Volume measurement method

It is a method that is familiar and adopted by everyone. After a certain volume of air absorbs carbon dioxide through a potassium hydroxide solution, the volume decreases, and the reduction is the amount of carbon dioxide. Eyeless gas analysis and detection equipment is the most commonly used analyzer. It can also determine the oxygen content in the air at the same time by using different absorption solutions. This method does not require standard gas calibration and directly measures the volumetric content of carbon dioxide. When the concentration is low, the accuracy is affected due to the large volume measurement error.

  1. Titration

This method is the recommended method for monitoring carbon dioxide in ambient air. It uses a sand core absorption tube filled with a barium hydroxide solution to collect carbon dioxide in the air and forms a barium carbonate precipitate. In order to increase the absorption efficiency of carbon dioxide gas, a small amount of n-butanol was added as a foaming agent. After sampling, the remaining barium hydroxide was titrated with an oxalic acid standard solution, and the barium hydroxide content in the absorption solution was titrated at the same time. The carbon dioxide content was calculated based on the difference between the blank and the barium hydroxide content in the sample.

  1. Infrared absorption method

This method is the recommended method for monitoring carbon dioxide in ambient air. Carbon dioxide has an absorption peak in the 4.3um infrared region. At this wavelength, oxygen, nitrogen, carbon monoxide, and water vapor have no obvious absorption. Therefore, the infrared absorption method is an ideal method for measuring carbon dioxide in the air. Because the content of carbon dioxide in the air is at least 0.03%, the length of the absorption tank can be a few centimeters. Therefore, using the infrared absorption principle, a portable carbon dioxide monitor can be made. The commercial infrared absorption method carbon dioxide analyzer uses a 4.3um wavelength as a measuring beam and a 3.9um wavelength as a reference beam. The structure of the instrument adopts the detection method of single optical path and time dual beams to achieve the purpose of dual optical paths. The measuring range of this instrument is. -1.5% carbon dioxide, the lower detection limit is 0.01%. The instrument is equipped with a small electromagnetic pump, which can automatically suck ambient air for measurement. This method is the most convenient and commonly used method for measuring carbon dioxide in ambient air. When the instrument is placed in the environment, the carbon dioxide content can be directly measured.

View more oxygen analyzer at www.avcray.com.

21 comments

  1. Theoretically, a longer session means greater odds of scoring some wins.

    My website … 온라인바카라

  2. I always spent my half an hour to read this website’s content everyday along with a mug of coffee.

  3. Does your site have a contact page? I’m having
    a tough time locating it but, I’d like to shoot you an email.
    I’ve got some suggestions for your blog you might be interested
    in hearing. Either way, great blog and I look forward to seeing it improve over time.

  4. It signifies the credit vdrify and transaction will nott influence
    your credit history.

    my website … 정부지원대출

  5. Professional traders are also able to trade-on-the-go with MetaTrader 5
    (MT5), the latest and enhanced version of MetaTrader.

  6. This is my first time visit at here and i am truly happy to read all at alone place.

  7. I was curious if you ever considered changing the structure of your blog?
    Its very well written; I love what youve got to say.
    But maybe you could a little more in the way of content so people could
    connect with it better. Youve got an awful lot of text for only having one or
    two pictures. Maybe you could space it out better?

  8. At this moment I am ready to do my breakfast, after having
    my breakfast coming again to read more news.

  9. Hey I know this is off topic but I was wondering if you knew of any widgets I
    could add to my blog that automatically tweet my newest twitter updates.
    I’ve been looking for a plug-in like this for quite some time and was hoping maybe you would have
    some experience with something like this. Please let me know if you run into anything.

    I truly enjoy reading your blog and I look forward to your
    new updates.

  10. I believe people who wrote this needs true
    loving because it’s a blessing. So let me give back and show my appreciatation change
    your life and if you want to seriously get to hear I will share info about how to
    get connected to girls for free Don’t forget..
    I am always here for yall. Bless yall!

  11. Make currently your fortunate day, the Keno way,
    1 of our most well-known casino games.

    Also visit mmy pzge – check here

  12. Thanks to their multilingual assistance staff, you can get enable
    anytime.

    Feel free to visit my website 우리카지노

  13. These Lego sets go beyond just being toys – they are supplies
    for our imaginations! We can build our stories with these sets.
    quality lego Brick kits Who needs a
    floral vase when you could have a LEGO Vase? It’s the ideal
    blend of creativity, nature, and fun! Jack had helped me with my LEGO Hoverboard
    but accidentally turned it into an enormous
    spaceship. Jack is very talented!

  14. The Lego Friends sets are fantastic for encouraging role play and friendship building skills.
    find the finest lego set for you Jack accidentally transformed my LEGO
    hoverboard into a spaceship when I asked him for assistance.
    Jack is very talented! This guide has opened my eyes to the world of
    Lego in ways I never expected. Who knew that brick building could be
    a rewarding and immersive experience?

  15. I’ve been surfing online more than 3 hours nowadays, yet I by no means
    found any interesting article like yours. It is beautiful worth sufficient for me.
    In my opinion, if all site owners and bloggers made good content
    as you did, the internet can be a lot more helpful
    than ever before.

  16. What’s up, of course this article is truly good and I have learned lot of things from it concerning blogging.
    thanks.

  17. I have been browsing online more than 4 hours today, yet I
    never found any interesting article like yours.
    It is pretty worth enough for me. In my view, if all website owners and bloggers made good content as you did, the internet will be a lot more useful than ever before.

  18. Hello, I enjoy reading through your article. I like to write a little comment to support you.

  19. You actually make it appear so easy along with your presentation but I to
    find this matter to be really something which I think I’d by no
    means understand. It kind of feels too complex and extremely wide for me.
    I am having a look ahead for your next publish, I will try to
    get the cling of it!

  20. This text is invaluable. Where can I find out more?

  21. The repertoire involves roulette, blackjack, Andar Bahar, baccarat,
    and game shows, hosted by native croupiers.

Leave a Reply

Your email address will not be published. Required fields are marked *

Free Worldwide shipping

On all orders above $50

Easy 30 days returns

30 days money back guarantee

International Warranty

Offered in the country of usage

100% Secure Checkout

PayPal / MasterCard / Visa