پاورپوینت سپکتروسکوپی (pptx) 95 اسلاید
دسته بندی : پاورپوینت
نوع فایل : PowerPoint (.pptx) ( قابل ویرایش و آماده پرینت )
تعداد اسلاید: 95 اسلاید
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بنام خدا
دیپارتمنت کیمیای فارمسی وکنترول ادویه
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سپکتروسکوپی
دیپارتمنت کیمیای فارمسی وکنترول ادویه
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Definition :
Spectroscopy - The study of the interaction of electromagnetic radiation with matter .
دیپارتمنت کیمیای فارمسی وکنترول ادویه
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Electromagnetic radiation :
An oscillating electric and magnetic field which travels through space
A discrete series of “particles” that possess a specific energy but have no Mass
BOTH!
دیپارتمنت کیمیای فارمسی وکنترول ادویه
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Properties of Light
Light can be thought of as a wave or particle.
The wavelength, , is the distance between crests of a wave (m)
The frequency, , is the number of oscillations per second (Hz)
دیپارتمنت کیمیای فارمسی وکنترول ادویه
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Introduction of Spectrometric Analyses
The study how the chemical compound interacts with different wavelengths in a given region of electromagnetic radiation is called spectroscopy or spectrochemical analysis.
The collection of measurements signals (absorbance) of the compound as a function of electromagnetic radiation is called a spectrum.
دیپارتمنت کیمیای فارمسی وکنترول ادویه
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Energy Absorption
The mechanism of absorption energy is different in
the Ultraviolet, Infrared, and Nuclear magnetic
resonance regions. However, the fundamental
process is the absorption of certain amount of energy.
The energy required for the transition from a state of lower energy to a state of higher energy is directly
related to the frequency of electromagnetic radiation
that causes the transition.
دیپارتمنت کیمیای فارمسی وکنترول ادویه
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Regions of the electromagnetic spectrum :
دیپارتمنت کیمیای فارمسی وکنترول ادویه
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Interaction of e.m.r. with Matter
Interaction of electromagnetic radiation with matter
The wave-length, l, and the wave number, v’, of e.m.r. changes with the medium it travels through, because of the refractive index of the medium; the frequency, v, however, remains unchanged
Types of interactions
Absorption
Reflection
Transmission
Scattering
Refraction
Each interaction can disclose certain properties of the matter
When applying e.m.r. of different frequency (thus the energy e.m.r. carried) different type information can be obtained .
