S1, supporting information) consisted of two cold traps chilled to 77 C using isopropyl alcohol and dry ice which were connected in series to two impingers filled with 20 mL of a 12.2 mM solution of dinitrophenylhydrazine (DNPH, purified by recrystallization) and 146 mM of phosphoric acid in 1:1 HPLC-grade water and HPLC-grade acetonitrile (Honeywell), as per the CORESTA standard method for carbonyl trapping
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Vaidya CJ, Austin G, Kirkorian G, Ridlehuber HW, Desmond JE, Glover GH et al (1998)
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