00442naa a2200145 a 450000100080000000500110000800800410001910000200006024501160008026000090019665000120020565000160021770000180023377300450025115996451995-06-27       1977    bl ---       0--  u    #d1 aSAFFIGNA, P. G.  aPrevention of 15N cross-contamination during distillation and potentiometric titration of 15N-labelled samples.  c1977  aMétodo  aNitrogênio1 aWARING, S. A.  tAnal. Chim. Actagv.89, p.203-207, 1977.