Not sure, about the only way I can think of is by date; before April 2010, IIRC, Apple were obliged to have DRM as they insisted on a single price for all tracks. Eventually, in order to do away with DRM they had to agree to the music business model of different prices for songs and albums. Any that you find won’t work, just drag them into a playlist, then, once you think you’ve found all of the DRM’d ones, burn a cd or DVD from that playlist then re-rip it back into iTunes; that way the DRM will no longer affect copying to your S3.
There might be an alternative way via iTunes, but you’ll need to search through Apple help forums, or Apple.com help.