Solubilidade de fosfatos naturais em solução de ácido cítrico a 2%: modificação nas condições de agitação
This paper deals with a modification in the solubilization technique of natural phophates in the 2% citric acid solution. The proposed technique is as follows: 2,5 g of phosphatic material and 250 ml of 2% citric acid solution, in a 500 ml Erlenmeyer flask, are shaken for 30 minutes at 30-40 rpm. The phosphorus (P2O5) was determined by the usual method. The data obtained were compared with the conventional technique in which a Stohmann bottle is used. The natural phosphates used were: Phosphorita de Olinda (Pernambuco), Flórida Phosphate (USA) and Hiperphosphate (África). Statistical analysis was applied to the data and the following conclusions were arrived at: a) The precision is equivalent in both techniques. b) There is no significant variation between the means obtained with the two technique.
| Main Authors: | , |
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| Format: | Digital revista |
| Language: | Portuguese |
| Published: |
Universidade de São Paulo
1960
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| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761960000100022 |
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