Turning each string in JSON object into a JavaScript array

I have a JSON object with length 220 as follows:

var tF = ["PETMEI 2011: the 1st international workshop on pervasive eye tracking and mobile eye-based interaction","Pseudo-Volumetric 3D Display Solutions", .....]

I want to create an array like this:

var arr = ["PETMEI","2011:", "the", "1st", "international", "workshop".........]

I have tried this method but it doesn't work as intended:

var arr = Object.keys(tF).map(function(k) { return tF[k] });

Any ideas on how to create an array as fast as possible?

Here is my working DEMO .

Thanks for your help!