Nitrogen stable isotope composition (δ15N) of vehicle-emitted NOx.

  title={Nitrogen stable isotope composition (δ15N) of vehicle-emitted NOx.},
  author={Wendell W Walters and Stanford R Goodwin and Greg V. Michalski},
  journal={Environmental science & technology},
  volume={49 4},
The nitrogen stable isotope ratio of NOx (δ(15)N-NOx) has been proposed as a regional indicator for NOx source partitioning; however, knowledge of δ(15)N values from various NOx emission sources is limited. This study presents a detailed analysis of δ(15)N-NOx emitted from vehicle exhaust, the largest source of anthropogenic NOx. To accomplish this, NOx was collected from 26 different vehicles, including gasoline and diesel-powered engines, using a modification of a NOx collection method used… CONTINUE READING

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