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CHENCO GROUP

CHENCO-GREECE 
Aft. Irakleiou 32 
15124 Marousi -Athens
Greece
Tel: +30 2106466084
Tel: +30 6931866660

Mr Sachinopoulos Nikolas

mail: chenco@mail.com
info@chenco-mail.com
sales@chenco-group.com
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CHENCO-BULGARIA 
Tzvetna Gradina 22
1421 Lozanets -Sofia

Store:
Dimitar Milenkov 83
1528 Dimitar Milenkov - Sofia
Tel:+359(0) 879088789
Fax:+359 (0) 28 650214

Mr Sachinopoulos Nikolas
Mr Dusko Manchev
Mr Dimitar Stoev
Ms Nadia Terzieva

mail: chenco@mail.bg
info@chenco-mail.com
sales@chenco-group.com
bulgaria@chenco-group.com


ШЕНКО БЪЛГАРИЯ ЕООД

Ул. Цветна Градина 22,
1421кв. Лозенец -София
Склад:
Димитьр Миленков 83
1528 кв. Димитьр Миленков -София 
Телефон: +359 (0) 879088789
Fax:+359 02 8650214
GSM:+359 0896148919 


CHENCO-CROATIA
Ulica Franje Račkoga 13
21000, Split, Hrvatska
Tel:+38521770704


Mr Sachinopoulos Nikolas
Mr Lukovich Vladislav
Ms Militsa Randich
Mr Dusko Manchev
 
mail: chenco@mail.com
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CHENCO-SERBIA
CTC 19 Avenue
38-40 Vladimir a Popovica 
11070 Belgrade
Tel:+381 (0) 631728040
Fax: +381-11-7156900


Mr Sachinopoulos Nikolas
Mr Lukovich Vladislav
Ms Militsa Randich
Mr Dusko Manchev

mail: chenco@mail.com
info@chenco-group.com
sales@chenco-group.com
serbia@chenco-group.com

CHENCO-ROMANIA
Strada Izror 80
050564 Bucharest
Tel: +40 316300209

Mr Sachinopoulos Nikolas
Ms Terzieva Nadia


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info@chenco-group.com
sales@chenco-group.com
romania@chenco-group.com

CHENCO-HUNGARIA
Baross utca 131
1089 Budapest
Tel:+36 14088862


mail: chenco@mail.com
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hungaria@chenco-group.com

Mr. Sachinopoulos Nikolas




 

www.chenco-group.com

WHAT IS THE SPECTROMETER?
Light consists of electromagnetic waves when they interact with matter scatter absorbed, reflected or disseminated in it. Studying the interaction of light with matter, we can get information about the structure of matter and generally the quality and quantity. For more accurate analysis of the material developed appropriate optical systems, spectrometers (or absorption spectroscopy), they can do automatically, quickly and reliably analyze the spectrum of light as interact with matter. By measuring the absorption of a beam specific wavelength from a sample and constructing the concentration-curve, we can draw useful conclusions about the nature, structure and concentration of a substance in the sample.

Basic parts
The spectrometers are generally from a light source (usually some type of incandescent lamp), various mirrors direct the beam, a monochromatora in which we choose the wavelength that we want a cell with the sample and a detector.

Species
The absorption spectrometers are divided into spectrographs single beam and dual beam. The difference is that the dual-beam radiation divide the source into two beams. One of them passes through the sample to be measured and the other from a standard sample (or zero sample). A device sends alternately in the two sets of light and that the detector. In this way we can measure more accurately the concentration of extending the range of measurement of density and non-linear regions of absorption and to bypass the errors due to electronic noise and manufacturing defects. The measurement is made by subtracting the two measurements gives the detector digital or analog, filtering the DC voltage and measuring the amplitude of the ac voltage we get.

Mode
For the absorption of monochromatic radiation in homogeneous medium there are two laws, the law of Lambert, which gives the final intensity of light after passing the sample (versus the thickness of the sample), and the law of Beer, which gives the intensity of light concentration of the solution. To calculate the absorption of radiation by solutions using a combination of two laws named Law Lampert-Beer:
where

I: intensity of light in the middle or at the average
I0: the light intensity before the medium
e: the depreciation rate color component solution (depending on the wavelength of incident radiation)
c: the concentration
l: the length traveled by light in the solution.
Basis sets the permeability and absorption, which is the basis of quantitative analysis.

Graph-absorbing assembly is normally linear for most of the solutions if done correctly the separation of substances and the peaks of the spectrum apart enough to be distinguishable. Non-linear regions of the curve due mainly to the components of the device, so I used standard solutions such as cobalt chloride and others, to calibrate the device. The parasite radiation% S calculated experimentally by the equation:
where

A: the experimental value of absorption for the higher measured concentration and
A0: the price of absorption if extrapolate the hypothetical straight line must be absorbed in the merger.

We can also estimate the photometric error E:

Monitoring Performance - Calibration
The controls generally do fotofasmatofotometra in the quantitative analysis, photometric photometric accuracy and repeatability.

In the quantitative analysis used standard solutions of known concentration and curve-absorption spectrum. We identify the device through the top of the greater absorption and determine the wavelength and absorption. If the curve is not straight use solutions with lower concentration. Finally check the concentration of an unknown solution.

To check the photometric repeatability use glass or metal filters with non-localized absorption, there are several consecutive measurements and calculate standard deviation s:
where

s2: the dispersion of experimental values
N: the number of experimental values
T: the experimental values of permeability, the average experimental values of permeability

The photometric accuracy is measured as the photometric repeatability. Made ten consecutive measurements with standard samples which have been calibrated to laboratory standards, and calculated the accuracy as the difference between the average of the measurements and the actual value of permeability given by the standard laboratory
XALKOR

XALKOR

www.halcor.gr
BIOXALKO

BIOXALKO

www.viohalco.gr
SOFIA MED

SOFIA MED

LAMKOS STEEL

LAMKOS STEEL

VEGA LEARNA

VEGA LEARNA

ELEKTROSTOMANA

ELEKTROSTOMANA

EGNATIA

EGNATIA

www.egnatiafoundry.gr
TSITOURAS BROSS

TSITOURAS BROSS

www.bells.gr
TSOUMAKIS FR

TSOUMAKIS FR

www.frederikos.com
TURBOMED

TURBOMED

www.turbomed.gr
KAZHS TORRENT

KAZHS TORRENT

www.tamesis-pumps.gr
KOTSARIDIS

KOTSARIDIS

www.kotsaridis.com
ALFA

ALFA

P.G.P. ΑΒΕΕ
GALANOPOULOI

GALANOPOULOI

GALANOPOULOI BROSS TEL:00302666023124
YLIKON

YLIKON

www.tfsi.com
DRAKOS-POLEMIS

DRAKOS-POLEMIS

www.dppumps.gr
MAKEDONIA

MAKEDONIA

MAKEDONIA FOUNDRIES S.A.
DECUR

DECUR

www.dekur.gr
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