15 Spectroscopy Why you should control temperature for more accurate and reproducible NIRS results


Near-infrared spectroscopy is an analytical method based on the interaction of light and matter. NIR spectrometers measure the absorption of light from the sample in the NIR region at wavelengths between 780 to 2500 nm. Results are fast and no sample preparation or chemicals are required.


Unfortunately, the effects of temperature variation on NIR measurements and its detrimental infl uence on accuracy and repeatability aren’t always immediately apparent. This is because temperature fl uctuations typically occur over extended periods and aren’t noticeable during the initial state of developing applications and creating NIR prediction models.


To negate the effects of temperature variation, you can heat the sample holder to the target temperature and use a defi ned waiting time to ensure thermal equilibrium. Unfortunately, determining the ideal waiting time to ensure the sample reaches the target temperature while leveraging the speed of NIR analysis is challenging. One of the reasons being the starting temperature of the sample can be infl uenced by seasonal effects.


A more sophisticated approach is to monitor the sample temperature. The OMNIS NIR Analyser is great for such monitoring due to the combination of multiple temperature sensors and a sophisticated algorithm. With the OMNIS NIR Analyser, temperature-controlled measurements can be defi ned to evaluate and regulate sample temperatures automatically before the measurement begins. This eliminates waiting times, ensures target temperature is reached while maintaining a high analysis speed, and minimises temperature fl uctuations.


More information online: ilmt.co/PL/RG9R 63731pr@reply-direct.com


Discover OMNIS: Your all-in-one solution for lab automation


Streamline your lab’s workfl ows with OMNIS by Metrohm, a modular platform designed for fl exible and customisable automation. OMNIS empowers your lab to perform high-throughput analysis for titration, Karl Fischer titration, and near-infrared (NIR) spectroscopy - seamlessly integrated to boost effi ciency.


Effortless automation for every need


OMNIS makes it easy to confi gure automated systems that match your unique requirements, from basic setups to sophisticated multi-device systems. Here’s what OMNIS offers:


Flexible titration automation: Achieve nonstop, unattended potentiometric and Karl Fischer titration. The OMNIS system supports simultaneous measurements, with confi gurations that handle up to four workstations and a Sample Robot managing up to 175 samples at once.


Enhanced effi ciency with NIR spectroscopy: Automate routine analysis of both liquid and solid samples with ease. The OMNIS platform allows you to quickly set up an NIR Analyser paired with a Sample Robot, making it possible to analyse more than 200 samples unattended- saving you time and increasing productivity.


Seamless integration for complex analyses


For labs requiring advanced workfl ows, OMNIS brings even more possibilities. The platform allows you to create a unifi ed system involving multiple devices, such as combining the OMNIS Titrator with an NIR Analyser for comprehensive, automated sample analysis. For instance, you can screen samples with cost-effective NIR spectroscopy and validate results with titration- all in one setup.


Take the next step in lab effi ciency with OMNIS.


More information online: ilmt.co/PL/YjEb and ilmt.co/PL/Mb4x


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