The NADP Analytical Lab will begin disposal of NTN and AMoN archived samples which have exceeded our sample retention policy. The following samples are available prior to disposal:
- NTN Archive Samples: 10 to 60 mL filtered precipitation (stored at 4°C); Samples from 2020
- AMoN Extracts – 5 mL of passive ammonia sampler extract (stored frozen); Samples from 2022-2025
All requests are subject to pricing and conditions set by NADP. Please contact the NADP Coordinator, Sarah Benish at 608-263-9162 or at sebenish@wisc.edu for sample archive requests. All unrequested samples will be removed on March 1st, 2026 and these samples will no longer be available for request.