If some urine is spilled on clothes and dried, will the clothes be suitable to pray in, especially if there is no chance to wash, ex: at work?

Praise be to Allah, the Lord of the Worlds; and Blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions. No prayer could be performed with the presence of any amount of urine on the body or the clothes, be it dry or wet. The body must be cleaned and the cloth must be changed or cleaned. Allah Says (Interpretation of meaning): {And your garments purify} . [74:4] And your being at work is not an excuse to give up purification and pray with an impure garment. And Allah knows best.