Optimización y comparación de métodos potenciométrico con electrodos selectivos para detectar iones sulfatos von H. Ledo de Medina, G. González

Volltext

Fractional phosphate composition in sediments from a tropical river (Catatumbo River, Venezuela) von Elena Romero-gonzález, María, Zambrano, Ernesto, Mesa, Johan, Ledo De Medina, Hilda

Volltext

Determination of metals in sediments of Sinamaica lagoon, Venezuela by atomic absorption spectrometry von COLINA DE VARGAS, M, LEDO DE MEDINA, H, ARAUJO, K

Volltext

Determination of total nitrogen in sediments by using high-pressure bombs and ion chromatography von COLINA DE VARGAS, M, LEDO DE MEDINA, H, VILLALOBOS, E, GUTIERREZ, E, MAZUREK, R

Volltext

Determination of Sulphur in Solid and Liquid Samples by Potentiometric Titration with Ion Selective Electrode von de Medina, Hilda Ledo, González, Graciela, Durán, José

Volltext

Nitrogen mobility at the sediment-water interface of Lake Maracaibo, Venezuela von LEDO DE MEDINA, Hilda, MARIN, Julio César, GUTIERREZ, Elizabeth, MORALES, José

Volltext

Nitrogen and phosphorus levels in sediments from Tropical Catatumbo River (Venezuela) von RIVAS, Z, DE MEDINA, H. L, GUTIERREZ, J, GUTIERREZ, E

Volltext

Determination of phosphate and sulphite in natural waters in the presence of high sulphate concentrations by ion chromatography under isocratic conditions von de Medina, Hilda Ledo, Gutiérrez, Elizabeth, de Vargas, Marinela Colina, González, Graciela, Marín, Julio, Andueza, Eduardo

Volltext

Determination of total nitrogen in water samples by means of high-pressure bombs and ion chromatography von de Medina, Hilda Ledo, de Vargas, Marinela Colina, Marin, Julio, Pirela, Dannis

Volltext