ABSTRACT
The application of this technique is discussed under multication analysis in section 7.23.7.1.
7.2 A m m onium 7.2.1 Spectrophotometric method
Berg and Abdullah [1] have described a spectrophotometric auto-analyser method based on phenol, sodium hydrochlorite and sodium nitroprusside for the determination of ammonium in sea and estuarine water (ie the indophenol blue method). The manifold design allows for the determination of ammonium concentration in the range 0.2-20 pg L _1 over a salinity range of 35-10% with negligible interference from amino acids.
