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H A N A L U K Š A N O V Á
H AN A. L U K S A N O VA @ L F M O TO L . C U N I . C Z
I N S TI TU TE O F M E D I C AL C H E M I S TRY AN D C L I N I C ALB I O C H E M I S TRY,
2 T H M E D I C AL FAC U LT Y, C H AR L E S U N I V E R Z I TY
Analytical methods
Analytical methods
Titration
Spectrometry
Chromatography
Electrophoresis
Potentiometry
Basic dividing of analytical methods
Qualitative analysis
+/-
Quantitative analysis
Amount
Titration
Volumetric analysis
Quantitative method
Titrant – titration reagent
Known concetration and volume
The equivalente point
burette
Titrationreagent
Titrationflask
Analyte
Types of titration
By reaction
Acid – base titrations
Redox titrations
Precipitation titrations
Complex titrations
Indication of equivalence point
Indicator Visualization of equivalence point
Color change
Weak organic acid and its conjugated base changes color
pH =pKHA ±1
Precipitation or turbidity
Instrumental methods pH
Conductivity
Redox potential
Titration curve
Titration curve
Optical analytical techniques
Instrumental optical analysis
Interaction of electromagnetic radiation with a mass
Non – spectral optical analytical techniques
change of specific radiation characteristics after passing though a
sample
Spectral optical analytical techniques
Energy exchange between radiation and matter
Optical analytical techniques
Spectral optical analytical techniques
Energy exchange between radiation and matter
Absorption techniques
absorbing of electromagnetic radiation
Emission techniques
light emission by sample
fluorescence and phosphorescence
Exitation by electromagnetic radiation
E
FL - fluorescencePh - phosphorescence
Non-radiative processes:
VR - vibrate relaxation IC - internal conversion ISC – intersystem crossing
Transmittance and Absorbance
Transmittance - relative proportion of the transmitted
radiation
Absorbance – Optical density – Absorption of
monochromatic wave
Lambert-Beer law
Lamber law
Beer law
Lamber-Beer law
Calibrate curve – standard curve
Wave length and arrange
Choosing of wave length
Chromatography
Separate technique based to different equilibrate distribution individual components to stationary a mobile phase
Michail Semjonovič Cvět Separated plant pigments in CS2 by a column
CaCO3
Chromatography – categorization I
Nature of the mobile phase
Gas chromatography
Liquid chromatography
Chromatography – categorization II
Form of the chromatographic bed of stationary phase Column chromatography Surface chromatography
Chromatography – categorization III
Type of separation process
Partition chromatography
different solubility in stationary and mobile phase
Adsorption chromatography
different ability to bind the stationary phase
Ion-exchange chromatography - IONEX
different ion interaction with stationary phase
Gel permeation chromatography
different compound size – molecular sieve
Affinity chromatography
selective interaction
ChromatographyRetention characteristics
Retention factor Rf
k
Starting point
Solvent front
TLC
Before separation After separation
ChromatographyRetention characteristics
Qualitative analysis Retention time
Retention factor R
Retention volume
Quantitave analysis Peak area
Calibration curve
Electrophoresis
Instrumental electromigration separation method
Separation of proteins and nucleic acids
Different mobility under influence of direct electric
field
Charge
Size
Electrophoresis - classification
Zone electrophoresis Electrophoresis on a supportConstant pH
Isoelectric focusation - IEF Isoelectric point (pI)- without chargepH gradient
Electrophoresis - classification
According to gel running setupVerticalHorizontal
Gel typeAgarose elektrophoresisPAGENativeSDS
2D –Electrophoresis
1 . Isoelektric focusation2. SDS PAGE 3. MS
Potenciometry
Electroanalytical method
Equilibrium potential of an electrochemical cell
Electron conductor (conductor of first class)
Ionic conductor (conductor of second class)
Nernst equation
Dynamic equilibrium of an electrochemical
reaction
Potenciometry
Ion select electrode (ISE) Ionts Selectively permeable membranes Membrane potencial
Glass electrode (ISE) pH
Direct potenciometry Potenciometric titration
Thanks for your attention