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HNO3 hiccup.

Althechemist
in Applied Chemistry

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So I'm having a slight issue with my work. I think I figured it out, but I want to see if there's something I'm missing. I'm using the KNO3+Cu+HCL method to generate NO2 and lead it into H2O2 inside an ice bath. I'm able to generate the NO2 after applying heat (since I'm using muriatic acid), but I think the ice is melting too fast (I do not have a fume hood so I am outside) So it got me to thinking that if I chill the H2O2 overnight, add only ice without adding water and try in the early morning or at dusk that it may fix the issue at hand. I am also unsure on the time it needs for the process. 

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