6Pai Su-Cheng,Tsau Yung-Jin, Yang Tai-I. pH and buffering capacity problems involved in the determination of ammonia in saline water using the indophenol blue spectrophotometer method[J]. Analytica Chimica Acta, 2001,434: 209-216.
7Aminot A, Kirkwood D S, Kerouel R. Determination of ammonia in seawater by the indophenol blue method: Evaluation of the ICES NUTSI/C 5 quesfionnaire[J]. Marine Chemistry, 1997, 56 : 59-75.
