FTIR spectroscopy: Techniques & technologies driving innovation

8 Jul 2020

Fourier-transform infrared (FTIR) spectroscopy is used to probe the molecular vibrations of a sample generating a chemical fingerprint from the molecules present within the beam of light. The technique has been employed in numerous ways across multiple fields, but whatever the aim of the experiment, an accessory is required to contain the matter under study and direct the light onto it.

For the past 50 years, Specac’s products have been at the forefront of scientific endeavor, driving innovation and answering critical questions across a range of scientific fields. In this application eBook, we review the literature for some of its most advanced products and explore the cutting-edge research undertaken by its customers, including sections on:

• Investigation of pharmaceutical dosage forms
• Understanding reaction mechanisms
• Catalytic studies
• Spectroscopy of gases
• Interstellar spectroscopy

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Storm™ Short Pathlength Gas Cell
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Specac offers a Short Pathlength Gas Cell that is ideal for routine gas and vapour spectroscopic analysis at room temperature, low pressures, and static or flow conditions. The cell has a fixed 10 cm pathlength, and is available in Pyrex™ and stainless steel. This Short Pathlength Gas Cell is supplied with a choice of NaCl, KBr, CaF2, BaF2, or ZnSe infrared transmission windows, and is mounted in an optical spectrometer with a version of 3” by 2” slide mount holder. Pyrex™ and PTFE taps are used on the Pyrex™ version of cell, whilst stainless steel and Viton® sealed valves are used on the stainless steel version of cell, to introduce samples to the cell. Features & benefits: Demountable for ease of cleaning and window replacement Choice of cell material: Pyrex™ and stainless steel Choice of window materials Window diameter: 47mm Clear aperture: 39mm Two ports for static or flow experiments Slide mounted cell holder
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Golden Gate® diamond ATR
Specac Ltd
The Golden Gate® is a robust option for demanding single-reflection ATR applications. It features a brazed diamond ATR crystal and a signature “Golden Gate” sample loading bridge. More advanced top-plate assemblies are available for in-situ, high- and low-temperature work.
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Quest diamond ATR
Specac Ltd
The Quest™ ATR is a single-reflection ATR accessory from Specac designed for routine use in academic and industrial laboratories. With features designed to inspire confidence in the quality of results and reliability in use, this product sets the benchmark in performance and value in FTIR-ATR Spectroscopy.
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High Temperature High Pressure Cell (HTHP)
Specac Ltd
Specac’s High Temperature High Pressure Cell (HTHP) Accessory is a multipurpose cell for the FTIR analysis of solid samples in transmission, decomposition, or specular reflectance modes. Sample temperatures up to 800ºC can be obtained and the cell can operate at pressures from vacuum (0.1 torr) to 1000 psi for in-situ reaction studies. The standard HTHP Cell (GS05850) can be used for transmission analysis of 13 mm diameter discs, or for decomposition spectral analysis of gases evolved from a solid sample held in a sample cup just below the beam height. Spectral reflectance measurements are facilitated by an alternative baseplate configuration with transfer optics, and with one of the standard window housings replaced with an angled window housing assembly. The parts required for this conversion are available as an upgrade kit GS05860, or provided as standard if the HTHP Cell is been ordered as the advanced version (GS 05855). Gas connections on the cell are provided for gas flow or purging purposes. The HTHP Cell is manufactured predominantly from corrosion resistant and vacuum compatible materials. ZnSe windows and silicone seals are used as standard, but other window materials and seals can also be provided. Temperature control of the accessory is provided by a dedicated power controller.
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