Electron microscopy
  
Air
- Practical Electron Microscopy and Database -
- An Online Book -
Microanalysis | EM Book                                                                                   https://www.globalsino.com/EM/        

This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
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Table 2350. Composition of air.

Material
% by wt.
% by vol.
Partial pressure (Pa)
Gas
amu
N2
28
 75.51 78.1 7.9x104
O2
32
 23.01 20.93 2.12x104
Ar
40
 1.29 0.93 9x102
CO2
44
 0.04 0.03 31
Ne
20
 1.2x10-3 1.8x10-3 1.9
He
4
 7x10-5 7x10-5 0.53
CH4
16
 2x10-4 2x10-4 0.2
Kr
83
 3x10-4 1.1x10-4 0.11
N2O
44
 6x10-4 5x10-5 0.05
H2
2
 5x10-6 5x10-5 0.05
Xe
131
 4x10-5 8.7x10-6 0.009
O3
48
 9x10-6 7x10-6 0.007
Water vapor at 50% RH, 20°C
18
 1.6 1.14 0.115
Hydrocarbon vapors
      
Non-hydrocarbon vapors
      
Organic particulates
      
Inorganic particulates
      

 

 

 
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