Why is this question paosed in Aerosol Chemistry?

And what do you mean with PPM in liquid ethanol???

tnx what a bout liguid suppose i have ethanol liquid how we can calculate the PPM for that

can you give the refrence for the formula that you mention and also if i have liquid ethanol how we can calculate the PPM for that

UV-Light-Activated ZnO Fibers for Organic Gas Sensing at Room Temperature

Jian Gong †‡, Yinhua Li †, Xinsheng Chai †, Zeshan Hu † and Yulin Deng

J. Phys. Chem. C, 2010, 114 (2), pp 1293–1298

Why is this question paosed in Aerosol Chemistry?

And what do you mean with PPM in liquid ethanol???

@Harry ten Brink may be its wrong ,

PPM( part per million)

@Mohammad Alenezi · i read the article that you mentioned there was not any direct method base on your formula can you give me better references

Enhancement of photoresponse and UV-assisted gas sensing with Au decorated

ZnO nanofibers

Yinhua Li, Jian Gong, Gaohong He, Yulin Deng

Materials Chemistry and Physics 134 (2012) 1172-1178

this is the PDF copy

@ Mohammad Alenezi thanks for your help let me read it carefully

More than welcome

Hello,  Dr. Mohammad R. Alenezi

C = [Vs X Ds X T X 8.2x10000] / [Ms X Va]

can you explain why you have put  8.2x10000?

What is this mean? is that any constant?

For vapors, flame ionization detection (FID) or photo-ionization detection (PID) are typical methods for detection of low (below or around LEL) concentrations of ethanol vapor.

Dr. Mohammad R. Alenezi

How about the concentration of liquid ethanol in a bottle which bubbling with argon gas?