the pressure of oxygen gas at 2.5·10^-6 Torr for 40 seconds will give a dose of 100 L.

Conversion

Since both different pressures and exposure times can give the same langmuir (see definition) it can be difficult to convert Langmuir (L) to exposure pressure × time (Torr·s) and vice versa. The following equation can be used to convert between the two easily: Here, and are any two numbers whose product equals the desired Langmuir value, is an integer allowing different magnitudes of pressure or exposure

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