Why did my pages get de-indexed?

On my blog all my posts were indexed, The posts would get indexed almost immediatly after I published them. but recently the 8 newest posts were deindexed and im not sure why.

I havnt done anything wrong as far as im aware. Is there anything i can do to get these site put back into googles index,

Ive got a fair amount of inbound links, according to google i have 772, and all the content is 100% unique, There are only 2 or 3 articles whereby i have reviewed articles on other authoity websites i.e. BBC or nature, but i have put my own spin on the content, and added my own perspective, but there shouldnt be an issue of duplicate content since everything is diffrent even the title.



Any ideas and suggestions?

Thank you for your help

 

Did you already submitted sitemap on google webmastertools? If not then do it for frequently indexing of your site.

 

Submit your rss and ping your blog to help index your posts quickly.

 

Yes i have and I do update it frequently

 

I have also done this

 

Its eb and flow of the google algo.