Sl. No.

Gas Mixture

Composition

 1

 Nitrogen / Oxygen

 10% O2 3.5

90% N2 5.0

2

Helium / Carbon Dioxide / Nitrogen

 4.5 % CO2

13.5% N2 5.0

82% He

3

Helium / Carbon Dioxide / Nitrogen

 5% CO2

40% He

55% N2 5.0

4

Helium / Carbon Dioxide / Nitrogen

7% CO2

28% N2 5.0

65% He

 5

Helium / Carbon Dioxide/Carbon Monoxide / Nitrogen 

 1.8% CO 3.7

13.5% CO2

16% N2 5.0

68.7% He

6

Helium /Hydrogen/ Carbon Dioxide/Carbon Monoxide / Nitrogen

 0.4% H2

4% CO 3.7

8% CO2

8% N2 5.0

79.6% He

 7

Helium /Hydrogen/ Carbon Dioxide/Carbon Monoxide / Nitrogen

 0.3.% H2 5.0

4% CO 3.7

9% CO2

12% N2 5.0

74.7% He

8

 Helium /Carbon Dioxide/Carbon Monoxide / Nitrogen

 2% CO 3.7

3.5% CO2

7% N2 5.0

87.5% He