No he wasn't capable of sealing only one energy. He sealed his wife Kushina's chakra with Hakke seal. I am not talking about Shiki Fuujin. Hakke seal does not cost him his life. The databook actually states Hakke seal was used for sealing spirits as well. So it's very versatile, and would work.
--
http://www.threadbombing.com/data/media/31/f53sle_2.gif
brawl 3524 9730 2525 - LALA