Ammonium Sulfate
Since ammonium sulfate was basically an inorganic compound, analysis of ammonium sulfate was included in this chapter. In samples containing ammonium + nitrite and/or nitrate, ammonium N isotopes were determined by distillation of the sample with addition of MgO (Bremner Keeney, 1965). Nitrite and nitrate do not react with the MgO under the ...
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