Analytical chemistry in chemistry

Meeting 2 :

Chemistry

INORGANIC

BIOLOGICAL

ORGANIC

DYNAMIC

STRUCTURE

ENERGY

THEORITICAL

COMPUTATION

PRACTICAL

MEASUREMEN

T

SAMPLING

STATISTIC

ANALYTICAL CHEMISTRY

SAMPLING TECHNIQUES

SEPARATION TECHNIQUES

QUALITATIVE ANALYSIS (IDENTIFICATION)

QUANTITATIVE ANALYSIS

QUANTITATIVE ANALYSIS

CONVENTIONALMETHODS

MODERN /INSTRUMENTAL

METHOD

TITRIMETRIC (Volumetric)

GRAVIMETRIC

CONDUCTOMETRIC

POTENTIOMETRIC

SPECTROMETRIC

Sampling techniques

To have the homogenuous sample

Some techniques: Grab samplingRandom samplingPurposive sampling

Separation Techniques

SublimationDestilationFiltrationExtractionEvaporationchromatography

QUALITATIVE ANALYSIS

-TO IDENTIFY SUBTANCES/CATIONS/ANIONS- SPOT TEST

- PRIOR TEST FOR QUANTITATIVE ANALYSIS

Quantitative Analysis(to determine content of a

substance in amount of sample)

Gravimetric method : quantitative analysis method based on mass measurement

Volumetric method : quantitative analysis method based on volume measurement

The measurement sometimes goes by titration

titrimetric methods

Quantitative Analysis

Potentiometric methods:- Based on potential (emf) measurement- Potential (E) Volt- E = - n R.T ln K Equation: A === B ; K = [B]/[A]

E = - n. R. T ln [B]/[A]

Conductometric method

Based on electrical conductivity measurementRelate to : ion formation in electrolytes

Principles: the more ion concentration, the greater conductivity

Spectrometric Methods

Principles: The measurement of matter-energy interaction

PtPoPa

Pr

b

Po = Pt + Pa + Pr