We report the first data set of atmospheric abundances for the following four perfluoroalkanes: n-decafluorobutane (n-C<sub>4</sub>F<sub>10</sub>). n-dodecafluoropentane (n-C<sub>5</sub>F<sub>12</sub>). n-tetradecafluorohexane (n-C<sub>6</sub>F<sub>14</sub>) and n-hexadecafluoroheptane (n-C<sub>7</sub>... https://www.roneverhart.com/GLYKON-BAYONET-BEAD-BLAST-OVERLAY-STONEWASH-STANDARD-NICKEL-BORON-INTERNALS-184-10/