Perdeuterated Internal Standard-All-in-one 16 EPA Priority PAHs Naphthalene-d8 0978.10 1146-65-2 Acenaphthylene-d8 1336.12 93951-97-4 Acenaphthene-d10 1524.12 15067-26-2 Fluorene-d10 1530.13 81103-79-9 Phenanthrene-d10 0389.14 1517-22-2 Anthracene-d