I wasn't quite sure if I was to post this in the Organic Chemistry section or here, but I finally decided it was analytical in nature.
My question(s) are:
1. How do you identify chemically the presence of Nitrogen in an organic compound?
2, How do you identify chemically the presence of Sulphur in an organic compound?
Any help would be appreciated, I've got a feeling it involves methods that have long become obsolete thanks to Mass Spectrometry.