Differential thermal analysis is a type of Thermal Analysis. This presentation includes definition of Thermal analysis, types of thermal analysis with focus on DTA, its principle, Instrumentation and applications.
Its a Perfect Powerpoint Presentation For Bachelors and Masters Of Chemistry Students. It Covers All the Basic Portion and Syllabus Which you Want in a Presentation. So,Go For It Friends!!
DSC ( differential scanning calorimetry) is a thermo-analytical technique for qualitative and quantitative assessment of our analyte on the basis of heat provision and heat withdrawn from pan with compensation of both pans.
In this slides contains principle and instrumentation of Differential Scanning Calorimeter (DSC).
Presented by: N Poojitha. (Department of pharmaceutics),
RIPER, anantapur.
Slide covers three methods of thermal analysis i.e., thermogravimetry, differential thermal analysis, and differential scanning calorimetry. Thermal analysis methods are well-established techniques in research laboratories of pharmaceutical industry. Thermal analysis includes all methods measuring some parameter during the heating of a sample .Thermal analysis is widely used to study the thermal stability, char content, and decomposition temperature of polymer composites reinforced with natural/synthetic fibers/or nanosized fillers etc.
Its a Perfect Powerpoint Presentation For Bachelors and Masters Of Chemistry Students. It Covers All the Basic Portion and Syllabus Which you Want in a Presentation. So,Go For It Friends!!
DSC ( differential scanning calorimetry) is a thermo-analytical technique for qualitative and quantitative assessment of our analyte on the basis of heat provision and heat withdrawn from pan with compensation of both pans.
In this slides contains principle and instrumentation of Differential Scanning Calorimeter (DSC).
Presented by: N Poojitha. (Department of pharmaceutics),
RIPER, anantapur.
Slide covers three methods of thermal analysis i.e., thermogravimetry, differential thermal analysis, and differential scanning calorimetry. Thermal analysis methods are well-established techniques in research laboratories of pharmaceutical industry. Thermal analysis includes all methods measuring some parameter during the heating of a sample .Thermal analysis is widely used to study the thermal stability, char content, and decomposition temperature of polymer composites reinforced with natural/synthetic fibers/or nanosized fillers etc.
Differential Thermal Analysis Introduction, Reference and Standard material, Instrumentation in that Furnace, Sample holder, Furnace temperature controller, DC amplifier and Recorder. Principle, Factors Affecting, Working, Physical and chemical reactions (Endotherm and Exotherm), Advantages and Disadvantages, Applications
Differential Thermal Analysis (DTA),principle of DTA, working of DTA, instrumentation of DTA, thermogram factors affecting DTA curve, advantages and disadvantages, applications of DTA, Thermogravimetry (TG),types of TG, principle of TG, working of TG, instrumentation of TG, thermogram of TG, factors affecting TG curve, advantages and disadvantages, applications of TG
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Indian Patent Act 1970 : This presentation includes definition of Patent, approval process, expiry and withdrawal, its renewal procedure, penalties and various brief topics with explanation of Indian patent act 1970 and its amendments thereafter.
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unwillingness to rectify this violation through action requires accountability.
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2. CONTENTS
Introduction to Thermal Analysis
Types of Thermal Analysis
Differential Thermal Analysis
Principle
Instrumentation
Applications
3. Thermal Analytical techniques
• When a material is heated its structural and chemical
composition can undergo changes such as fusion,
melting, crystallization, oxidation, decomposition,
transition, expansion and sintering. (1)
• Using Thermal Analysis such changes can be
monitored in every atmosphere of interest. The
obtained information is very useful in both quality
control and problem solving.
(2)
4. Types of thermal analysis
• TG (Thermogravimetric) analysis:
weight
• DTA (Differential Thermal Analysis): temperature
• DSC (Differential ScanningCalorimetry):
temperature (2) (3)
5. Differential Thermal Analysis
• In Differential Thermal Analysis, the temperature
difference that develops between a sample and an
inert reference material is measured, when both are
subjected to identical heat - treatments. (3)
• This is a comparison method
• Analytical method for recording the difference in
temperature (∆T) b/w a substance and an inert
reference material as a function of temperature or
time
• Any transformation – change in specific heat can be
detected by DTA. (4)
6. • In DTA both test sample & an inert reference material
(alumina) are controlled by heating or cooling
programming
• If zero temperature difference b/w sample &
reference material – sample does not undergo any
chemical or physical change.
• If any reaction takes place temperature difference
(∆T) will occur b/w sample & reference material
(4)
7. Principle
The basic principle involved in DTA is the
temperature difference (∆T) between the test sample
and an inert reference sample under controlled and
identical conditions of heating or cooling is recorded
continuously as a function of temperature or time,
thus the heat absorbed or emitted by a chemical
system is determined.
The shape and the size of the peak give information
about the nature of the test sample.
(5)
8. (1) Sharp endothermic peaks indicate phase changes or physical
changes (such as melting, fusion etc.) transition from one
crystalline form to another crystalline form.
(2) Broad endothermic peaks are obtained from dehydration
reactions
(3) Chemical reactions like oxidative reactions are exothermic
reactions. (3) (5)
9. Instrumentation
1. Sample holder comprising thermocouples, sample
containers and a ceramic or metallic
block.
2. Furnace.
3. Temperature programmer.
4. Recording system. (6)
10. -- Identical pair of cavities for the sample, ref. material
-- Whole unit is set in an oven- control pressure
-- Thermocouple is place directly in contact with the
sample and another in contact with the reference
-- Temp.of the block is raised, the temperature of the
sample & reference follow
--Zero temp. difference – no physical or chemical
change
-- If any reaction – difference in ∆T (6) (7)
Working
11. Applications
1. DTA curves for two substances are not identical. Hence they serve
as finger prints for various substances.
2. Used to study the characteristic of polymeric material.
3. This technique is used for testing the purity of the drug sample
and also to test the quality control of number of substances like
cement, soil, glass, etc.
4. Used for the determination of heat of reaction, specific heat and
energy change occurring during melting etc.
5. Trend in ligand stability (thermal stability of the ligands) gives the
information about the ligands in the coordination sphere. (7)
13. References
1. Pollock M H, Hammiche A. Micro-Thermal Analysis: te
chniques and applications, Journal Of Physics 2000; 34(
1): 21-53.
2. Ozawa T. Thermal analysis Review and Prospect, Journa
l of Chiba Institute of Technology 2000; 1(1): 35-42.
3. Pask A J, Warner F M. Differential Thermal Analysis me
thods and techniques, University of california 1953; 18(
5): 5-28.
4. Klancnik G, Medved Jozef. Differential Thermal analysi
sand Differential Scanning colorimetry, Materials and G
eo environment 2010; 57(1): 127-142.
14. 5. Vold J R. Differential thermal analysis, Analytical c
hemistry 1999;21(1): 684-688.
6. Ghaderi F, Monajjemzadeh F. Molecular pharmace
utics and Organic process research, Journal of mole
cular organic research 2015; 3(1): 5-18.
7. El-Naggar Y A. Thermal analysis of modified and u
nmodified silica gels, Scholarlink Research Institut
e Journals 2013; 4(1): 144-148.