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Métodos de análise quantitativa inorgânica em caldo de cana de açúcar; vinhaça e melaço: I. determinação de cálcio, magnésio, potássio, enxofre e fósforo em um mesmo extrato

.     LITERATURA CITADA CATANI, R. A., N. A. DA GLÓRIA & A. J. ROSSETO, 1965 - Determinação de potássio em fertilizantes por fotometria de chama. Anais da ESALQ, 22:12-55.         [ Links ] CATANI, R. A., D

Método do EDTA na determinação do cálcio e magnésio "trocável

This paper describes the determination of exchangeable calcium and magnesium in soil by using ethylenediamine tetracetic acid, after the separation of the principals interferents (iron, aluminum, manganese and phosphate) by using both ammonium hidroxide and ammonium sulfide in only one operation. In order to compare the chelometric and the permanganometric methods for determining...

Determinação de cálcio e magnésio em plantas, pelo método do EDTA

The present work reports a study of the chelatometric method (by EDTA titration) for determining calcium and magnesium in plant materials. A preliminary study about the influence of severals íons (Fe3 +, PO43 -, Al3 +, SO42 - and Mn2+) was performed. The presence of sulfate and aluminum did not cause interference in the method. Manganese (200 micrograms) interferes by causing the...