共 3 条
[1]
Preparation of nitrate collected on anion exchange resin columns for nitrogen isotopic analyses. Silva S R,Kendall C,Wilkison D H,Evanzino R J. Isotope Geoscience . 1995
[2]
Evaluation of the origin and fate of nitrate in the Abbotsford aquifer using the isotopes 15 N and 18 O in NO3. Wassenaar L I. Applied Geochemistry . 1995
[3]
Combustion tube method for measurement of nitrogen isotope ratios using calcium oxide for total removal of carbon dioxide and water. Kendall C,Grim E. Analytical Biochemistry . 1990