NOVELTY - An adsorption-desorption apparatus comprises a solid-phase carbon sorbent medium having carbon sorbent material characterized by Heel of at most 50 g gaseous arsine, at most 20 g boron trifluoride, at most 250 g gaseous arsine, at most 700 g arsenic pentafluoride, at most 160 g trimethyl silane, and/or at most 10 g ethane, based on per liter of bed of the material.    USE - For storage and dispensing of a sorbable fluid useful in semiconductor manufacturing, ion implantation, manufacture of flat panel displays, medical intervention and therapy, water treatment, emergency breathing equipment, welding operations, and space-based delivery of liquid and gases.    ADVANTAGE - The invention uses a high efficiency sorbent material that offers advantages in cost, ease of use, and performance characteristics. It obviates the risk of leaks and bulk dispersion of the sorbate fluid to the ambient environment, reduces the associated sorption waste rates and increases the industrial efficiency of the fluid storage and delivery system.    DETAILED DESCRIPTION - An adsorption-desorption apparatus comprises a storage and dispensing vessel (302) for holding a solid-phase carbon sorbent medium, a solid-phase carbon sorbent medium (350) disposed in the vessel at an interior gas pressure, a sorbable fluid physically adsorbed on the sorbent medium, and a dispensing assembly coupled in gas flow communication with the vessel and arranged for dispensing from the vessel sorbable fluid desorbed from the sorbent medium.    The solid-phase carbon sorbent medium comprises carbon sorbent material that is characterized by:    (i) a Heel of at most 50 g gaseous arsine/L of bed of the sorbent material measured for gaseous arsine (AsH3) at 20 degrees C at 20 Torr;    (ii) Heel of at most 20 g boron trifluoride/L of bed of the sorbent material measured for the gaseous boron trifluoride (BF3) at 20 degrees C at 20 Torr;    (iii) Heel of at most 250 g gaseous arsine/L of bed of the sorbent material measured for gaseous germanium tetrafluoride (GeF4) at 20 degrees C at 20 Torr;    (iv) Heel of at most 700 g arsenic pentafluoride/L of bed of the sorbent material measured for gaseous arsenic pentafluoride (ArF5) at 20 degrees C at 20 Torr;    (v) Heel of at most 160 g trimethyl silane/L of bed of the sorbent material measured for gaseous trimethyl silane (3MS) at 20 degrees C and 20 Torr; and/or    (vi) Heel of at most 10 g ethane/L of bed of the sorbent material measured for gaseous ethane at 21 degrees C and 25 Torr.    An INDEPENDENT CLAIM is also included for a process for supplying a fluid reagent comprising adsorbing the fluid reagent on the carbon sorbent medium at an interior gas pressure to yield a sorbate fluid-retaining carbon sorbent medium, desorbing the fluid reagent from the medium, and dispensing the desorbed fluid medium from the vessel.    DESCRIPTION OF DRAWING(S) - The figure shows a perspective sectional view of the gas storage and dispensing vessel.    Storage and dispensing vessel (302)    Solid-phase carbon sorbent medium (350)