Dear Jahangir,

Please have a look on the attachments, may helps you to step further

http://www.osha.gov/dts/sltc/methods/partial/t-pv2077-01-9003-ch/t-pv2077-01-9003-ch.html

Another one for you. All the best

http://www.lenntech.com/calculators/ppm/converter-parts-per-million.htm

Dear Phani Raj Karlapudi · thanks for your answer but still i didnt see the bright point can you give more detail

regards

Dear Jahangir, Are you trying to calculate PPM of NO2 or CO2? If you are looking for NO2 please have a look at this attachment.

http://www.osha.gov/dts/sltc/methods/inorganic/id182/id182.html

If you are looking for CO2 please have a look at this attachment. This is a system calculator for the required CO2 to add in PPM.

http://www.hydroponics.net/learn/co2_calculator.asp

dear Phani

thnak for your answers

im searching for bubbling method to calculate the ethanol ppm,

Dear jahangir,

Please search this also.

http://www.skcinc.com/converter/converter.asp

http://jat.oxfordjournals.org/content/21/5/369.full.pdf

Really thanks your help

i want to know that if i put 50 microlitres of liquid ethanol in 1 litre of chamber and close it, then how can we calculate the ppm of ethanol in that chamber.