Knowledge Why is KBr used in IR spectroscopy? (4 Key Reasons)
Author avatar

Tech Team · Kintek Solution

Updated 2 months ago

Why is KBr used in IR spectroscopy? (4 Key Reasons)

Infrared (IR) spectroscopy is a powerful analytical technique used to study the molecular structure of various materials.

KBr, or potassium bromide, plays a crucial role in this process.

Here’s why KBr is the preferred choice for IR spectroscopy.

Why is KBr used in IR spectroscopy? (4 Key Reasons)

Why is KBr used in IR spectroscopy? (4 Key Reasons)

1. Transparency to Infrared Light

KBr is chosen for its optical properties in the infrared region.

It is transparent to infrared light, which is essential for IR spectroscopy.

This transparency allows the radiation to pass through the sample, enabling the detection of molecular vibrations and rotations.

2. Formation of Pellets

The KBr pellet method involves mixing a small amount of the sample with KBr and then compressing this mixture under high pressure to form a transparent disk.

This technique is advantageous for analyzing solid samples that might not be easily soluble.

The ability to form pellets with controlled thickness and sample concentration ensures that the sample does not block the infrared light path.

3. Control of Pathlength

By adjusting the thickness of the KBr pellet, the pathlength of the infrared light through the sample can be controlled.

This is crucial for obtaining accurate and interpretable spectra.

The pathlength affects the intensity of the absorption bands, enhancing the resolution and sensitivity of the measurement.

4. Preparation and Handling

KBr is hygroscopic, meaning it absorbs moisture from the air.

This property requires careful handling and preparation of the KBr pellets to prevent interference from absorbed water in the spectra.

Techniques such as grinding and pressing in a controlled environment help mitigate this issue.

Continue exploring, consult our experts

Experience the precision of KINTEK SOLUTION's KBr pellets for your IR spectroscopy needs.

Our high-purity KBr ensures maximum transparency to infrared light.

Our exclusive pellet-formation method guarantees controlled pathlengths and reproducible results.

Discover the key to accurate solid sample analysis with KINTEK SOLUTION’s reliable and hygroscopic-resistant KBr pellets.

Elevate your spectroscopic research with KINTEK SOLUTION – your partner in excellence.

Related Products

Potassium Fluoride (KF) Sputtering Target / Powder / Wire / Block / Granule

Potassium Fluoride (KF) Sputtering Target / Powder / Wire / Block / Granule

Get top-quality Potassium Fluoride (KF) materials for your lab needs at great prices. Our tailored purities, shapes, and sizes suit your unique requirements. Find sputtering targets, coating materials, and more.

Optical ultra-clear glass sheet for laboratory K9 / B270 / BK7

Optical ultra-clear glass sheet for laboratory K9 / B270 / BK7

Optical glass, while sharing many characteristics with other types of glass, is manufactured using specific chemicals that enhance properties crucial for optics applications.

barium fluoride (BaF2) substrate / window

barium fluoride (BaF2) substrate / window

BaF2 is the fastest scintillator, sought-after for its exceptional properties. Its windows and plates are valuable for VUV and infrared spectroscopy.

Infrared Silicon / High Resistance Silicon / Single Crystal Silicon Lens

Infrared Silicon / High Resistance Silicon / Single Crystal Silicon Lens

Silicon (Si) is widely regarded as one of the most durable mineral and optical materials for applications in the near-infrared (NIR) range, approximately 1 μm to 6 μm.

Zinc sulfide (ZnS) window

Zinc sulfide (ZnS) window

Optics Zinc Sulphide (ZnS) Windows have an excellent IR transmission range between 8-14 microns.Excellent mechanical strength and chemical inertness for harsh environments (harder than ZnSe Windows)

Alkali-free / Boro-aluminosilicate glass

Alkali-free / Boro-aluminosilicate glass

Boroaluminosilicate glass is highly resistant to thermal expansion, making it suitable for applications that require resistance to temperature changes, such as laboratory glassware and cooking utensils.

High Purity Iridium (Ir) Sputtering Target / Powder / Wire / Block / Granule

High Purity Iridium (Ir) Sputtering Target / Powder / Wire / Block / Granule

Looking for high-quality Iridium (Ir) materials for laboratory use? Look no further! Our expertly produced and tailored materials come in various purities, shapes, and sizes to suit your unique needs. Check out our range of sputtering targets, coatings, powders, and more. Get a quote today!

Infrared transmission coating sapphire sheet / sapphire substrate / sapphire window

Infrared transmission coating sapphire sheet / sapphire substrate / sapphire window

Crafted from sapphire, the substrate boasts unparalleled chemical, optical, and physical properties. Its remarkable resistance to thermal shocks, high temperatures, sand erosion, and water sets it apart.

Zinc selenide(ZnSe) window / substrate / optical lens

Zinc selenide(ZnSe) window / substrate / optical lens

Zinc selenide is formed by synthesizing zinc vapor with H2Se gas, resulting in sheet-like deposits on graphite susceptors.

Optical Windows

Optical Windows

Diamond optical windows: exceptional broad band infrared transparency, excellent thermal conductivity & low scattering in infrared, for high-power IR laser & microwave windows applications.

High temperature resistant optical quartz glass sheet

High temperature resistant optical quartz glass sheet

Discover the power of optical glass sheets for precise light manipulation in telecommunications, astronomy, and beyond. Unlock advancements in optical technology with exceptional clarity and tailored refractive properties.

Optical quartz plate JGS1 / JGS2 / JGS3

Optical quartz plate JGS1 / JGS2 / JGS3

The quartz plate is a transparent, durable, and versatile component widely used in various industries. Made from high-purity quartz crystal, it exhibits excellent thermal and chemical resistance.

CaF2 substrate / window / lens

CaF2 substrate / window / lens

A CaF2 window is an optical window made of crystalline calcium fluoride. These windows are versatile, environmentally stable and resistant to laser damage, and they exhibit a high, stable transmission from 200 nm to about 7 μm.


Leave Your Message