Challenges in measuring nitrogen isotope signatures in inorganic nitrogen forms: An interlaboratory comparison of three common measurement approaches.

ABSTRACT:

Rationale

Stable isotope approaches are increasingly applied to better understand the cycling of inorganic nitrogen (N_i ) forms, key limiting nutrients in terrestrial and aquatic ecosystems. A systematic comparison of the accuracy and precision of the most commonly used methods to analyze δ¹⁵ N in NO₃ ^- and NH₄ ⁺ and interlaboratory comparison tests to evaluate the comparability of isotope results between laboratories are, however, still lacking.

Methods

Here, we conducted an interlaboratory comparison involving 10 European laboratories to compare different methods and laboratory performance to measure δ¹⁵ N in NO₃ ^- and NH₄ ⁺ . The approaches tested were

SUBMITTER: Biasi C 

PROVIDER: S-EPMC9541070 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature