Is distillation of the sample necessary when following an ammonia method?

Dokument-ID

Dokument-ID TE142

Veröffentlichungsdatum

Veröffentlichungsdatum 15.06.2022
Frage
Is distillation of the sample necessary when following an ammonia method?
Zusammenfassung
Nitrogen, ammonia distillation recommendations
Antwort
Each nitrogen, ammonia method list potential interfering substances in the "Interferences" section. The process of distillation eliminates the interferences from the sample. The United States Environmental Protection Agency (USEPA) requires distillation for wastewater reporting.

Distillation may be necessary for seawater samples using the nitrogen, ammonia Nitrogen, Ammonia-Nessler Method 8038_DOC316.53.01078 which states high chloride concentrated samples have reduced sensitivity by 30%. For best results, perform a calibration, using standards spiked to the same chloride concentration or distill the sample.

For nitrogen, ammonia distillation instructions reference, Distillation Apparatus User Manual (Product # 2265308)

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