I don't know about Ammonium Hydroxide, but any Copper Sulphate is a covalent copper, thus would emit in the blue region of the spectrum. Note that there should be adsorption lines in the 432nm & 460nm range. I'd suggest you look into interference effects of hydroxides via adsorption lines.
Is your assignment for an experiment that you are performing?
If it's a titration experiment then hydroxide would probably be used as an agent to indicate the presence of copper (not sure which kind though, cupric (covalent) or cuprous (monolavent)).
It's been decades since I've studied Chemistry. Alas, all my Chemistry books are in storage back in the USA, so I'm going from one of my books here, The Spectroscope and Gemmology, Anderson & Payne (1998) and extrapolating some possibilities.
OIC!
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