Pallabi,

Please check the following researchgate link

https://www.researchgate.net/post/How_can_I_prepare_carbon_dioxide_saturated_water

Good luck

Thank you Sir for your reply.

Hi Pallabi,

Drop a small piece of dry ice to cold distilled water in a plastic bottle, close the botlle remaining a little openig for CO2 escape.

Dear Pallabi Das, you can get enough information by downloading pdf document from the link below:

1-s2.0-S1876610214023868-main.pdf

Good Luck!

You can use NaHCO3, Na2CO3, and HCl to control the dissolved CO2. I am attaching a paper that describes the process.