Determinação do teor de edta remanescente em soluções de limpeza de equipamentos industriais


Autoria(s): Rodella,Arnaldo Antonio
Data(s)

01/08/2007

Resumo

Cleaning solutions containing EDTA are widely employed to remove incrustation despite of the costs involved. The free content of EDTA in commercial solutions may be determined by mixing an aliquot to ammonium oxalate and using a standard calcium solution as titrant. The end-point is detected by the formation of insoluble calcium oxalate after all EDTA is complexed. A system for turbidimetric detection of the end-point was envisaged to substitute the visual detection, which impaired the analyses of dark samples. The proposed method was tested with real samples and good accuracy and precision was obtained.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000400042

Idioma(s)

pt

Publicador

Sociedade Brasileira de Química

Fonte

Química Nova v.30 n.4 2007

Palavras-Chave #EDTA analysis #turbidimetric end-point #industrial cleaning solutions
Tipo

journal article