Some time ago I bothered to check it. Unfortunately I didn't find the proc rate for Purify.
Effect %chance
Sacrificial Strike 15
Determination 3
Rip 25
Soul Shatter 3
God of Frenzy 20
Armor Crush 8
Square Formation 8
Death Will 5
Spirit Blackhole 5
Thunder Shocker 5
Soul Conceal 5
Blood Vengeance 8
Frenzied Rage 8
Thunder Strike 6
Buddha's Strike 10
Lord of War 8
Furious Dragon 3
Melody of Sword Lord 3
Purify stored somewhere else? but I believe it's 5%
Heavenly Array 5
Infinite stored somewhere else?
Fragrance Dance 2
Charming Shadow 5
Everything Else 5
Note: only Sacrificial Strike and God of Frenzy work with all skills. The rest of status won't proc on skills that have certain effect for example stun, slow, defense decrease etc,