Skip to main content

Applications of Near Infra-red (NIR) and Far Infra Red and Advantages of NIR

  Some Important IR Regions:

ü Near-IR region:  4,000 cm–1 - 13000 cm–1.

ü Mid-IR region: 670-4000 cm-1

Ø Functional group region: 1450 cm–1 - 4000 cm–1.

Ø Fingerprint region: 670 cm–1 - 1450 cm–1.

ü Far-IR region: 10 cm–1 - 670 cm–1 

 

Near Infra-red (NIR) Spectroscopy:

ü The near-IR extends from approximately 13,000 cm–1 - 4000 cm–1

ü The absorption bands in the near-infrared often are overtones and combination bands of these group frequencies (of O-H, C-H and N-H)

ü The instrumentation for NIR spectroscopy, both in transmission mode and in reflectance mode, is similar to that for UV/visible spectrometers and for mid-IR spectrometry.

 

Applications of NIR Spectroscopy

ü Near-infrared spectroscopy is used in astronomy for studying the atmospheres of various stars by detecting the vibrational and rotational signatures of molecules such as titanium oxide, cyanide, and carbon monoxide which further provide a clue towards the star's atmospheric composition

ü Widely used for quantitative analysis of foods, several commercial instruments are available for compositional analysis of foods using NIR spectroscopy. 

ü NIR is also used for various applications in agriculture like for detecting insect damage, for maintaining fruit quality by excluding internally damaged fruits, moisture determination

ü NIR is also used in Pharmaceuticals industry for determining dosage forms for various pharmaceuticals, process monitoring like packaging, for detecting adulteration in food products.

Advantages of NIR over Mid-IR or Far-IR:

ü A major advantage of NIR spectroscopy is its ability to measure directly the composition of solid food products by use of diffuse reflection techniques.

ü Compared to mid-IR, the NIR is more useful for a quantitative analysis of aqueous samples because the OH absorption bands are much weaker. }

 

Far IR (Infra-Red) Spectroscopy

ü The far-IR extends from approximately 670 cm–1 - 10 cm–1 

ü FIR spectroscopy finds applications in the analysis of materials that include metals, including metal oxides, metal sulfides, and metal-ligand complexes.

ü FIR spectroscopy has also been applied to the analysis of polyamides, peptides, and proteins.

ü Because the FIR merges into the microwave region, it also finds use in the analysis of the rotational energies of gases.


Get the Best Price at IndiaMART for photo album for kids:


Photo Album - https://m.indiamart.com/impcat/photo-album.html?utm_source=GrowYourkids-il5kh&utm_medium=affiliate&utm_campaign=0624&utm_content=8



Get the Best Price at IndiaMART for pen box:


Wooden Pen Box - https://m.indiamart.com/impcat/wooden-pen-box.html?utm_source=GrowYourkids-il5kh&utm_medium=affiliate&utm_campaign=0624&utm_content=12

Labels:

Comments

Post a Comment

Popular posts from this blog

Flame Emission Spectrometry

In flame Emission Spectrometry, the combustion flame not only frees the atoms but it also supplies the energy necessary to move the electrons of the free atoms from ground state to excited state.  The energy which is emitted by the excited atoms when returning to the ground state provides the basis for analytical determination in Flame Emission Spectrometry. Applications of Atomic Emission Spectrometry: 1. Food Industry: for detection of calcium and iron in beer . 2. Biological/Medical Applications: For determination of Na, K, Ca and Mg in body fluids and other biological samples. 3. For determination of Alkali and Alkaline Earth Metals in plant Materials, Chemicals, Cements, Oceanography and Ceramic Materials. Get best price at India Mart for spiral diaries: Spiral Diaries - https://m.indiamart.com/impcat/spiral-diaries.html?utm_source=GrowYourkids-il5kh&utm_medium=affiliate&utm_campaign=0624&utm_content=4
Post a Comment
Read more

Renewable sources of energy

  Renewable sources of energy   are the sustainable energy sources because the se   are not depleted with usage as they can be replenished either naturally or manually within the short time scale and hence can be used again and again. Advantages/Benefits of Renewable sources of energy ü  Ensure energy Security ü  R educ tion in   greenhouse gas emissions, ü  Help to combat   the change s in   climat ic conditions   T ypes of   Renewable sources of energy 1. Solar Energy Solar energy   is one of the most abundant and widely used renewable source s of energy which can be used as follows: i.  Either directly as heat for solar heater for boiling water/preparing food etc. ii.  Or converted   to electricity using Photovoltaic (PV) Solar Panels   which is then used as energy source for diverse purposes. Photovoltaic (PV) Solar Panels : These are the panels prepared using semiconductor materials (e.g., silicon) ...
Post a Comment
Read more

Atomic Absorption Spectrometry

  Atomic Absorption Spectrometry is an absorption spectroscopic technique in which radiation of a particular frequency from a source is absorbed by non-excited neutral gaseous atoms  generated in an atomizer in their ground state. The light is absorbed in the UV-visible region and makes transitions to higher electronic energy levels. The amount  of light absorbed is quantified and this amount of absorption helps in determining the analyte concentration. (It follows Beer's Law) The concentration is measured by drawing a calibration curve  after calibrating instrument with a  standard of known concentration. Factors affecting  the amount of light absorbed Length of path transversed Concentration of absorbing atoms in the vapour state. The diagrammatic representation of Atomic Absorption Spectrometer are shown in the below diagram:  Components Used in Atomic Absorbance Spectrometer: 1. Hollow Cathode Lamp: Acts as source of radiation  It is a sha...
Post a Comment
Read more