Produção Nacional
Revisado por pares
Desenvolvimento de um titulador baseado na contagem de gotas
2010; Brazilian Chemical Society; Volume: 33; Issue: 3 Linguagem: Inglês
10.1590/s0100-40422010000300041
ISSN1678-7064
AutoresAndré Fernando de Oliveira, Alexandre Correa de Lima, Astréa F. Souza Silva, Rodrigo de Maio Almeida,
Tópico(s)Innovative Microfluidic and Catalytic Techniques Innovation
ResumoA TITRATOR BASED ON DROP COUNTING.TitDrop II, a practice low-cost titrator based on drop counting is proposed.A microcomputer counts drops in an opto-switch and it receives pH values from a commercial pHmeter with RS-232 serial port.The volume of drops must kept constant and the amount of base in each drop is obtained by standardization in the titrator.A linear behavior between height of reservoir of titrant and drop frequency was observed, but there is no influence of low height on drop volume.Acetic acidity in samples of vinager was compared with volumetric titration, and deviation between -2.6 to 3.9% was observed.
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