Liviu Călin BOLUNDUŢ

26-27 NOI TIPURI DE STICLE CA POTENŢIALI SENZORI PENTRU DETERMINAREA NITRAŢILOR DIN APĂ

Această intrare a fost publicată în 2014 Revista Volumul 26 și etichetată Elena Maria PICĂ Eugen Culea Liviu Călin BOLUNDUŢ Loredana Rus Mioara Zagrai Simona Rada la de

NEW TYPES OF GLASS AS POTENTIAL SENSORS TO
DETERMINE THE NITRATES ANIONS
FROM WATER
In this paper is presented a new type of glass that can be used as
potential electrochemical sensor for nitrate anions from aqueous solutions. The
glass sample obtained was analysed by FT-IR and UV-VIS spectroscopy and
cyclic voltammetry (VC). The cyclic voltammetry shows that the current
increase with the increasing of concentration of sodium nitrate from aqueous
solutions. The FT-IR spectrum after VC shows a decreasing of [PbO6] structural
units from the glass, probably increasing in this way the number of free lead
ions (Pb+2) and improving the electrochemical properties of the glass sample.
The decrease in the intensity of the UV-VIS absorption bands after VC shows
that a part of Fe+3 ions convert to Fe+2 ions and pass into solution.
Keywords: glass, sensors, IR spectroscopy, cyclic Anodic, UV-VIS
spectroscopy, nitrates in water
Cuvinte cheie: sticlă, senzori, voltametrie ciclică, spectroscopie IR,
spectroscopie UV-VIS, nitraţi din ape
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20-28 METODE DE DETERMINARE A ACIDULUI FORMIC (HCOOH)

Această intrare a fost publicată în 2011 Volumul 20 și etichetată Corina NEAMŢU Elena Maria PICĂ Ioana POPIŞTER Liviu Călin BOLUNDUŢ Mircea BEJAN la de

SOME DETERMINATION METHODS OF
FORMIC ACID (HCOOH)
This paper is a short review about synthesis and determination
methods of formic acid from solution mixtures. Formic acid is used in many
industries such as textiles, natural rubber, in agriculture, as well as for
cosmetics, disinfectants, detergents, medicines, to controlling acidity against
microbial growth, fuel for power cells etc. In the same time is considered an
environmental pollutant, so the principal method for determination is the titration
process. Another methods mentioned in the literature are enzymatic method
and catalytic oxidation method.
Keywords: formic acid, formic acid determination methods, linear
voltammetry
Cuvinte cheie: acid formic, metode de determinare acid formic,
voltametrie liniară

28 METODE DE DETERMINARE A ACIDULUI