SPECTROSCOPY FEATURE
‘Agricultural samples come in many different forms…we need to present them to the spectrometer in a specific way for the measurement to be reliable’
out in the field reduces the time between sampling and the point at which a decision is made based on the results, up to the point that decisions can now be made in real time.”
Ongoing spectroscopy challenges Panagia cited facilitating the widespread adoption of the technology by non-technical users as one of the main challenges facing spectroscopy. However, he said improvements to chemometrics – the set of algorithms used in spectroscopy to translate spectra into physical and chemical information, which in turn can inform the user about the decisions they need to make – are helping address this challenge. Sample presentation was also highlighted as a challenge by Panagia, particularly for precision agriculture: “This is because
in agriculture samples come in so many different forms – soil, seeds, liquids, fruits, etc – and we always need to present the samples to the spectrometer in a specific way in order for the measurement to be reliable and repeatable.” Lastly, he cited the continual need to
improve signal-to-noise ratio in order to be able to detect smaller and smaller concentrations of a substance in a sample. “This is especially true for reflectance measurement, and this is where Hamamatsu is proposing some innovation,” he said. “We recently released a new special lamp, the L16462-01, to improve signal-to-noise ratio in both our FTIR engine and any other spectrometers working in near-IR wavelengths, specifically between 1,100- 2,500nm. The lamp design includes four halogen lamps. It has an output power of 2.5W, a footprint of 28 x 35.5mm, and a 7,000-hour lifetime. The light from the lamp is diffused/reflected by the sample and then conveyed into the built-in optical fibre, which brings it to the spectrometer.” In conclusion, Panagia remarked that Hamamatsu Photonics is continually working to address each of these challenges to equip industry with the best possible technology. “We’re also committed to
helping people, for example through improving the quality of our food, and to Earth, for example by reducing the amount of potentially harmful fertiliser that we use in agriculture, while also reducing the amount of waste we produce.” (In addition to precision agriculture, recycling is one of the potential applications of the L16462-01). Overall, the future looks very promising
for spectroscopy firms and customers alike. System specs continue to improve, the markets and number of applications continue to grow, and increasingly intelligent data analysis algorithms are emerging to reveal previously unknown metrics to customers. EO
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