How Can Barium Nitrate Enhance CO2 Measurement Accuracy?

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    Co2 Measuring
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A straightforward method to measure CO2 concentrations in the air is by using a CO2 meter, such as the one from Vaisala. Additionally, it is feasible to calculate CO2 concentration through a chemical reaction involving calcium hydroxide (Ca(OH)2). By passing a known volume of air through a solution of Ca(OH)2, one can either titrate the remaining solution or filter and weigh the resultant calcium carbonate (CaCO3) to determine CO2 levels. For enhanced sensitivity, barium nitrate is suggested as a more effective reagent compared to calcium hydroxide.
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What would be a relatively simple methodology to measure the CO2 concentrations of the air? Any help is appreciated. Thanks!
 
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The simplest way would be with a CO2 meter: http://www.vaisala.com/instruments/products/carbondioxide/gm70
 
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Thanks! As a side note, would it be possible, knowing the volume of a room, to create a chemical reaction allowing an individual to calculate the CO2 concentration from the mass of the product?
 
Yes, you could have a known concentration of CaOH2, blow a known volume of air through it and either titrate the remaining CaOH2 or filter out the CaCO3 and weigh it
 
For the record: Ca(OH)2.
 
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