Persistent luminescence of heavy metal-free glass composites for white lighting
| Full text | |
| Author(s): |
André Fernando Oliveira
[1]
;
Alexandre Correa Lima
[2]
;
Astréa F. Souza Silva
[3]
;
Rodrigo de Maio Almeida
[4]
Total Authors: 4
|
| Affiliation: | [1] Universidade de Mogi das Cruzes. Núcleo de Ciências Ambientais - Brasil
[2] Universidade de Mogi das Cruzes. Núcleo de Ciências Ambientais - Brasil
[3] Universidade de Mogi das Cruzes. Núcleo de Ciências Ambientais - Brasil
[4] Universidade de Mogi das Cruzes. Núcleo de Pesquisas Tecnológicas - Brasil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Química Nova; v. 33, n. 3, p. 721-724, 2010-00-00. |
| Abstract | |
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. (AU) | |
| FAPESP's process: | 05/54617-2 - Recovery of the biodiversity of na area of Atlantic Rainforest contaminated by heavy metals: a proposal for bioremediation |
| Grantee: | Elisa Esposito |
| Support Opportunities: | BIOTA-FAPESP Program - Regular Research Grants |