Back at It Again at Krispy Kreme Context
Quick hits:
- Raman spectroscopy is a process that allows the chemical composition of material samples to exist adamant by exposing them to electromagnetic radiation.
- Raman spectroscopy can measure multiple variables at once with high accuracy, allowing results to be delivered in real-time for continuous, on-the-wing optimization.
- Currently, Raman spectroscopy is largely limited to laboratory use, and has yet to be unremarkably applied to in-line applications.
Related to this episode:
- In-Line Raman Spectroscopy for Procedure Optimization
- Endress+Hauser'due south Ethernet-APL Arroyo
Heed to the story here:
 | Read the transcript beneath: |
Hello and welcome to Take Five with Automation. I'thousand David Miller, Senior Technical Writer for Automation World. The topic of today'southward video is going to be something chosen Raman Spectroscopy. Now, what is Raman Spectroscopy? Reverse to what you might initially think, it is not related to the popular noodle dish that you may have eaten in college – rather, it takes its name from C.V. Raman who is the physicist that pioneered it. And what it is, more than specifically, is a non-invasive technique for determining the chemic composition of material samples past exposing them to electromagnetic radiation.
Now, I am non a physicist, nor a chemist, only I tin requite our viewers a loftier-level overview of how this works. In essence, what occurs when Raman spectroscopy is used is that photons – or electromagnetic radiation – basically simply light of some sort – is fired at a substance. And depending on the molecular make-upwardly of that substance, and the way its molecules are vibrating, the light that is reflected back volition undergo certain minute variations in its wavelength, which a raman spectrometer tin discover and analyze. From there, the device tin make assessments of all kinds of variables such as temperature, level, flow, or pressure.
Dandy toy, correct? Just the of import thing to ask is why is it relevant to industry? Well, in a word, it has several advantages over other methods when used either to monitor process variables for control purposes in in-line process industry applications, or for quality control procedures in process industries such as chemical or pharmaceutical production where an output product needs to be tested and verified for regulatory purposes or something of this nature.
At present, you know, I'm sure yous guessed it, merely I do want to talk in a little more than particular about these same advantages. But, just first, before we do that, viewers know the drill at this indicate in time, nosotros're going to take a quick interruption to hear a message from PMMI.
Welcome back. So, what are the advantages of using Raman spectroscopy for monitoring process variables and conducting quality control tests in process manufacture environments?
There are a few.
Start of all, when you employ conventional field instruments to gather measurements and analysis parameters such as the previously mentioned level, flow, pressure, and temperature, these variables are recorded individually and fed into a regression model, which is basically just a statistical tool for measuring the human relationship between multiple variables. And so that allows you to meet how these parameters are changing over time in the form of a visual gradient or bend.
The result is that when you practise this, you have two drains on you, both of which Raman Spectroscopy can eliminate. The first is that you lot accept to use many different sensors to ascertain each different parameter. The second is that yous would take to program a new regression model for each new application yous're looking to mensurate. And so basically information technology's very asset intensive, lots of sensors, and time intensive in terms of the demand for reconfiguration.
By contrast, with Raman spectroscopy, the promise at least is that you can measure multiple variables simultaneously, and take results delivered in real-time, so that you don't take run a procedure, bank check the data, reconfigure and run again, but instead can engage in an on-the-fly optimization. The thought beingness that this would help you speed cycle times, increase yields, if there'due south a trouble with a batch of something, you lot can figure it out before the batch is finished, so on.
So, for in-line usage, this is a relatively new technology. Currently, industrial applications for Raman spectroscopy are mostly limited to a laboratory context. And then basically, when set in a lab instead of integrated directly into a process command system, y'all have to depict samples and transport them. This ways they can modify during transport, and then of form, there is the issue of the delay in obtaining a result, meaning that, equally I said earlier, you cannot engage in corrective measures while the process is still running. This would atomic number 82, obviously to waste.
Only again, this is something that is developing – we are beginning to see Raman process analyzers for in-line applications hit the market place. So, if you're interested in reading more about that, feel free to click on the link below.
In whatsoever example, that's almost all I take for you lot today.
Source: https://www.automationworld.com/TakeFive/video/22159414/raman-spectroscopy-process-analysis-benefits-explained
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