Method for quantitative analysis of hydrogen in porous silica

A method for quantitative analysis of hydrogen in porous silica, comprising:

• (i) heating porous silica used in a production of metallocene polypropylene catalyst at 0.1 bars to 0.15 bars and at 550° C. to less than 700° C. for 60 seconds to 1.5 minutes to evaporate moisture, and then adsorbing the evaporated moisture on a moisture scrubber to remove the adsorbed moisture, and
• (ii) heating the porous silica from which moisture has been removed at 0.1 bar to 0.15 bars and at 1200° C. to 1300° C. for 60 seconds to 1.5 minutes to decompose a Si—OH group, resulting in hydrogen gas, and then transferring the hydrogen gas to an infrared detector using a carrier gas to quantitatively analyze hydrogen using an inert gas fusion-infrared absorption (IGFIA) method
• wherein the porous silica has an average particle size of 30 μm to 55 μm and a BET surface area of 300 m2/g to 350 m2/g,
• wherein the porous silica includes hydrogen in an amount ranging from 100 mg/kg to 1000 mg/kg.