... All solvents used were HPLC-grades from Kokusan Chemical Co ... a gas chromatograph equipped with a nitrogen−phosphorus detector (NPD, Hewlett-Packard, HP-5890A series II) using ... To show that the identification of 1- and 2-nitrotriphenylenes in the ambient samples by our ...
[Zielinska, Barbara; Arey, Janet; Atkinson, Roger; Ramdahl, Thomas; Winer, Arthur M.; Pitts, James N. Jr. Journal of the American Chemical Society, 1986 , vol. 108, # 14 p. 4126 - 4132]