Application Notes

To see what our Raman spectroscopy solutions can do for you, please check out our application notes and white papers below. If you would like more information and would like to discuss your current application, please feel free to contact us at 416-361-3444 or email

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High-performance Raman spectroscopy, made possible by Tornado Spectral Systems’ patented High-Throughput Virtual Slit (HTVS™), enhances Raman signal by increasing photon flux by 10x to 30x as compared to conventional spectrometers. This significant advancement in technology enables faster measurements, lower limits of detection, and/or the use of intrinsically safe lower laser power, when needed. These additional gains in spectral quality and sensitivity uniquely enable success in difficult applications, such as fast measurements of proteins of interest during both upstream and downstream bioprocessing. In this white paper, learn how Tornado’s Raman analyzer is a powerful tool for monitoring downstream protein purification process quality and how it can predict the chromatographic elution concentrations of proteins (BSA and CytC) with a high degree of specificity.

High-performance Raman spectroscopy, made possible by Tornado Spectral Systems’ patented High-Throughput Virtual Slit (HTVS™), increases Raman signal by delivering an order of magnitude more photons to the detector when compared to conventional spectrometers. This revolutionary improvement in spectrometer throughput and signal strength results in a three-to six-fold increase in signal-to-noise resolution, or a ten-fold decrease in exposure time requirements. This enables faster measurements, lower limits of detection, or the use of intrinsically safe lower laser power, if needed. Furthermore, additional gains in Raman spectrum quality and sensitivity can be achieved via ultrasonic manipulation of particulates in the sample matrix, as described in this white paper.

The OPIS 35 laser accessory is a companion to the HyperFlux™ PRO Plus Raman Analyzer. The combination of both devices allows Raman analysis to be performed safely in an explosive atmosphere. The OPIS 35 was designed pursuant to the set of IEC 60079 standards specifying the requirements for construction, testing and marking of equipment capable of putting optical radiation and electricity into a regulated explosive atmosphere. In this technical note, learn how both devices allow Raman analysis to be performed safely in an explosive atmosphere.

Flow chemistry is used in many aspects of industrial processing including (but not limited to) continuous reaction chemistry, preparation and quantification of feedstocks, and product purification processes. Analytical monitors for flow chemistry processes can provide precise, accurate, and timely measurements to ensure that products or excipients are properly quantified and are being produced with maximum efficiency. However, current spectroscopic tools are limited to bulk analysis and are a bottleneck in many applications. Tornado Spectral Systems HyperFlux™ PRO Plus puts Raman into the forefront of monitoring and controlling these highly dynamic processes. This application note demonstrates the benefit of HTVS™ for in-line method development and real-time predictions of a low-level analyte in a continuous process.

Although Raman spectroscopy is a powerful and flexible analytical tool, Raman signals are usually quite weak – for most molecules fewer than one Raman scattered photon is generated from one million incident laser photons – so spectrometer efficiency (sensitivity) is of utmost importance. Furthermore, Raman spectral bands are often both narrow and closely spaced. Traditional slit spectrometers require a very narrow input slit to achieve high spectral resolution and therefore have poor optical throughput, limiting their effectiveness in low light level scenarios like Raman spectroscopy. A spectrometer design that incorporates Tornado’s HTVS™ (High-Throughput Virtual Slit) technology avoids this trade-off between sensitivity and spectral resolution and thus enhances overall system performance, making measurement of weak Raman signals a practical reality. A Raman measurement that is intended for quantification needs to be fast, accurate, and precise, encapsulating the best possible resolution in both wavelength and intensity. This white paper describes the proprietary HyperFlux™ optical spectrometer designs developed by Tornado Spectral Systems using its core HTVS™ technology.

This study assessed the performance of the HyperFlux™ PRO Plus Raman Spectroscopy System (Tornado Spectral Systems) for the quantitative analysis of biochemical components in a simplified chemically defined pseudo growth medium for mammalian cell culture. An experiment was designed to evaluate the ability of Raman Spectroscopy to directly measure individual components in a complex mixture at concentrations at or below the limit of quantification of conventional Raman spectrometers. A set of samples with varying amounts of glucose, lactate, glutamine, glutamate, ammonium, arginine, histidine, leucine, and phenylalanine were prepared so that covariance between components was close to zero. The spectral collection and model development were completed in one day. The sample spectra were collected in a morning using fast acquisition times and promising calibrations were developed in the afternoon using basic pre-treatments such as derivatives and normalisation. An assessment by Sanofi UK of the performance of the HyperFlux™ PRO Plus Raman Spectroscopy System for the quantitative analysis of biochemical components in a simplified chemically defined pseudo growth medium for mammalian cell culture.

Conventional Raman systems have traditionally been limited by a lack of sensitivity due to the design trade-off between resolution and throughput mediated by the input slit of the spectrometer. Tornado’s proprietary high throughput virtual slit (HTVS™) design technique eliminates the spectrometer and associated slit losses while maintaining high spectral resolution, resulting in an order of magnitude improvement in sensitivity. This application note demonstrates the improved detection limits and corresponding minimum required acquisition times of four binary mixtures using Tornado’s HyperFlux™ PRO Plus Raman spectroscopy system. Higher sensitivity is achieved by using HTVS to eliminate the conventional trade-off between spectral resolution and optical throughput.

Chemical production and processing is an essential part of modern life and the foundation of numerous industries including pharmaceutical, petrochemical, food & beverage, specialty chemical, and bioprocessing. Continuous in-line real-time measurements can ensure quality, improve efficiency, and enhance economy compared to off-line testing of samples extracted from a process. However, in-line real-time measurements can be challenging to obtain with enough speed and accuracy to be useful. The superior performance of Tornado Spectral System’s HyperFlux™ PRO Plus Raman spectroscopy system helps overcome these limitations, making it an ideal solution for chemical reaction monitoring in production line and laboratory settings. In this application note, a major pharmaceutical company needed to monitor the conversion of benzoic anhydride to the corresponding ester. We present how Tornado’s HyperFlux™ PRO Plus provided a fast and accurate monitoring tool to confirm reaction quality and optimize reaction timing.

Photovoltaic manufacturers are under increasing pressure to improve quality and reduce cost. One important process and quality parameter is the degree of crosslinking in the ethylene vinyl acetate (EVA) material used as the solar cell embedding material which supports and protects the solar cells. Currently available methods of measuring EVA crosslinking are not capable of real-time in-line measurement due to slow speed, the need to extract samples, and a lack of consistency and precision. Tornado’s HyperFlux™ spectrometer was deployed for Raman analysis to determine the degree of curing of ethylene vinyl acetate (EVA) in a photovoltaic module manufacturing line and was shown to have enough sensitivity and speed to be an effective tool for real-time, in-line quality control and process optimization.

Raman spectroscopy is a highly-selective and non-destructive optical spectroscopy technique which relies on the inelastic scattering of laser light to probe molecular structure. The non-destructive nature of Raman measurements along with the molecular specificity of the spectra make it an optimal technique to monitor manufacturing processes in real time. The use of Raman can facilitate process understanding and allow effective process control, thus helping minimize production errors. We present new insights into a recycled polymer extrusion process.

Photopolymers possess unique capabilities, including the possibility for ambient temperature curing and the potential for control over where and when the polymer cures. These capabilities have given rise to a variety of products and processes including dental materials, contact lenses, coatings, microfluidic device fabrication, tissue engineering matrices, and photolithography. Recent developments in photopolymer technology include monomer mixtures and co-polymers. These applications are limited by our understanding of the photopolymerization process. A means for in situ monitoring of the cure process that would yield distinctive and attributive data would provide a better understanding of the curing process by enabling more accurate cure modeling of these materials. Such capabilities would allow optimal end-point predictions and would also enable process monitoring with instant parameter adjustment feedback. Tornado’s HyperFlux™ spectrometer was deployed for Raman analysis to determine a UV-curing process. The use of the Tornado Raman spectrometer enabled accurate diagnostic tracking of the cure cycle of the Accura® 60 photopolymer.

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