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Lecture 21
HPLC-2
Instrumentation
Injector
Column
Chromatograph
Data Processing
Detector
Percentage of solvents having the same eluent strength
B-
acetonitrile CH3CN
t r2
t r2
N  16  2  constant 
 constant
2
W
W
tr
 constant
W
Width W is proportional
to retention time tr
‘general chromatography problem’
Solution of GNP: gradient
Pump
4.5 mm2 HPLC columns of different length
Injector
Detectors
UV cell
Derivatization in HPLC
Evaporative LightScattering Detector
Electrochemical detection of alcohols in water
HO
1
OH
HO
2
3
CH3OH
4
HO
HO
CH3CH2OH
OH
5
OH
6
OH
OH
7
OH
HO
13
O
14
8 2-butanol
9 2-Methyl-1-propanol
10 1-butanol
11 3-methyl-1-butanol
12 1-pentanol
Chemistry: Oxidation of alcohols @Au electrode
OH
MS Detector
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