| Definition | Oxygen 93% contains between 90.0%V/V and 96% V/V of O2. Remainder mainly consists of argon and nitrogen. Monograph applies to oxygen used on the site where produced. It does not apply to individual concentrators. | Oxygen 93 is Oxygen produced from Air by molecular sieve process. Contains not less than 90.0% V/V and not more than 96% O2 V/V, the remainder consists of mostly Argon and Nitrogen |