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-, UV-Vis
(ULTRAVIOLET- VISIBLESPECTROMETRY)
, 2015
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UV-Vis (~190- 800 nm) , .
UV-Vis
( , IR), .
.
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.
.
UV-Vis (190-400 nm) (400-800 nm), < 190 nm :
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:
, .
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()
( )
400-435
435-480
480-490 /
490-500 /
500-560 /
560-580 /
595-610 /
610-680 /
680-700 /
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UV-Vis
: ( ).
( ) ( ).
s *.
p
*. (.. , , S, ) n.
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R1C
2O
R2
-
-
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UV/VIS
(
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* (.. ) UV-Vis.
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UV-Vis
: , , -OR, -NHR, -SH, -2 Cl 200 nm, n * . (max) .
. : (..
) . : N=N, C=N, CC, C=C,
N=O, C=O. :
(max) ( ).
: max .
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: . : : max= 255 nm,: max: 270 nm, : max: 280 nm.: .
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UV-Vis
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UV-Vis
: ) : . .
(180-350 nm). ) : . (350-2500 nm).
: .
: UV: . Vis: . ( ).
: , , .
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: . : 1) (blank) , =0 , ,
, 2) , .
:
. . / .
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(PHOTODIODE ARRAY)
.: , . (1 nm 0.1 nm ).
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UV-Vis
UV-Vis .
( IR). .
.
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.
.
.
:
UV-Vis. .
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:
1. - (.. , ).
2. ( - - Zn HCl).
Ar-NH2+ 2 HCl + NaNO2Ar-N+
N, Cl-
+ NaCl + 2 H2O
1: NaNO2 :
2 : -(-)- max :
NH(CH2)2NH3Cl NH(CH2)2NH3Cl
N=N-Ar
Ar-N N, Cl- + + HCl+
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1:
NO2 O P
O-Et
O-Et
ClNH3 O P
O-Et
O-Et
S + 3 Zn + 7 HCl S + 3 ZnCl2+ 2 H2O
1 : - -( ).
2 : NaNO2/ HCl .
3 : -(-)-
.
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2:
1: FeCl3 .
:
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UV-Vis
(Transmittance, T): = / 0,%= 100 .
(Absorbance, A): : A = log(0/).: .
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.
.
.
(, , )
.
LAMBERT- BEER
Lambert- Beer (< 0.01 ): .
Lambert- Beer (.. , , ...) .
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0.3421 g Mn MnO4
-, 1000 ml ( ). 21.5%,
KMnO4410-5 46.0% nO4
-. ( Mn, 54.94).
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. - pH.
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UV-Vis:
1. .2.
.
3. pH.
4. . .
1= 1 b C, A2= 2 b C(A2-A1) = (2-1) b C
= b C
5. . :
s
x
sxCC
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-
(UV grade) .
. 15-65%.
.
.
. -
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UV-Vis
UV . .
.
.
.
.
.
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PDA
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- ( , ,, ). .
. .
.
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SCATCHARD
(.. - ).
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[]/[]
. []/[] .
n-m
m
-nMeXXmMe
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II
, 550 nm 450 cm-1/M. 6.00 10-4. 550nm
0.0100 1 cm (: 1.593);
RNH2 , 359 nm (= 1.25 104 cm-1/ M). 0.1155 g 100 ml. 1.00 ml 250
ml. = 0.454 359 nm 1.00 cm ; (: 127,2).
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