What is the recommended chemistry for measuring Nitrogen Ammonia in Seawater samples?

Document ID

Document ID TE145

Published Date

Published Date 25/01/2018
Question
What is the recommended chemistry for measuring Nitrogen Ammonia in Seawater samples?
Summary
Measuring nitrogen-ammonia in seawater samples
Answer
Each nitrogen-ammonia method has an interference section that lists interfering substances. Many of the methods will list seawater or chloride as an interference. Listed below are seawater sample recommendations:

Nitrogen-Ammonia Salicylate Methods 8155, 10023, and 10031 are acceptable for seawater samples.
Nitrogen-Ammonia Nessler Method 8038 recommends distillation for seawater samples.
Nitrogen-Ammonia TNTplus Methods 10205 lists chloride over 1000 mg/L as an interference and recommends distillation for seawater samples.

Visit www.hach.com/wah for a full list of Hach ammonia methods.