Artificial sunlight (total irradiance of 590000mWm2) generated
from a SolSim photoreactor (Luzchem Research Inc., Canada)
was used to photolyze DNAN under solar-simulated conditions.
Irradiation assays were conducted in duplicate at 25 C in 20mL
quartz crucibles (25 mm ID) containing 5 mL of aqueous solutions
of DNAN (50 mg L1). Samples were withdrawn at selected times
ranging from 0.7 to 21 d and analyzed by HPLC and LC–MS as
described below. DNP (70 mg L1) was also photolyzed using the
same conditions. A control containing DNAN covered with aluminum
foil was also prepared.