Zulay Rivas

Determination of vanadium species in sediment, mussel and fish muscle tissue samples by liquid chromatography–inductively coupled plasma-mass spectrometry

P. Gardiner, M. Colina, F. Troncone, 2005 .

Baseline of Ca, Mg, Fe, Mn and Al Concentrations in Catatumbo River Surficial Sediments

H. Ledo, Zulay Rivas, J. Gutiérrez, 2004 .

Nitrogen and Phosphorus Levels in Sediments from Tropical Catatumbo River (Venezuela)

Zulay Rivas, J. Gutiérrez, Hilda Ledo de Medina, 2000 .

Modified procedure for the simultaneous determination of nitrogen, phosphorus and sulphur by hydrogen peroxide microwave digestion and ion chromatography

P. Gardiner, M. Colina, F. Troncone, 2006 .