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I have talk with my Gas supplier and a found out that 99.995 purity on
He costs a fraction (100$)
comparing to the 99.999� (400$) that im� buying up to now. The main
point is that they cannot
certify the impurity. That means that they cannot tell you whats in the
rest of 0.005.
So i figured that if the rest is O2 or Co2 then there is not really a
problem but what if the
rest is Co ?? I talk with a friend and he suggested to use 2 on line
filters a Sub micron filter for
the particles and a catalyst filter to break Co to Co2 .

Should i spend the 600$$ for the filters or should i just take my
chances with 99.995 ?

Manos
�
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