[tina]

Hi people,
            
                 Please help me out in answering this question,
I'm don't know wheather it is zinc or copper element in complex form can detect ammonia.(or... some other element which is used in galvanic cell)
                 Actually,i need to solve a riddle..in chemistry so i need this hint to answer it.
                          

                            thanq in advance
           

[AWK]

http://www.chemguide.co.uk/inorganic/complexions/colour.html