French magistrates in August opened a murder inquiry into Arafat's death in Paris in 2004, after a Swiss institute said it had discovered high levels of polonium on clothing of his which was supplied by his widow, Suha, for a television documentary.
"The state of the body was exactly what you would expect to find for someone who has been buried for eight years," Health Minister Hani Abdeen told a news conference. "There was nothing out of the ordinary."
Jordanian doctor Abdullah al Bashir, head of the Palestinian medical committee, said about 20 samples were taken and analysis would take at least three months.
"In order to do these analyses, to check, cross-check and double cross-check, it will take several months and I don't think we'll have anything tangible available before March or April next year," said Darcy Christen, spokesman for Lausanne University Hospital in Switzerland that carried out the original tests on Arafat's clothes.
Arafat was always a freedom fighter to Palestinians but a terrorist to Israelis first, and a partner for peace only later. He led the bid for a Palestinian state through years of war and peacemaking, then died in a French hospital aged 75 after a short, mysterious illness.
No autopsy was carried out at the time, at the request of Suha, and French doctors who treated him said they were unable to determine the cause of death.
But allegations of foul play surfaced immediately. Arafat had enemies among his own people, but many Palestinians pointed the finger at Israel, which confined the leader to his West Bank headquarters in Ramallah for the final two and a half years of his life, after a Palestinian uprising erupted.