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I would like to know which medical devices use visible light reflected from a test strip to accurately measure changes in colour and so allow the concentration of a substance to be calculated?
6 min reading time
As originally asked by Sean Hillman.
Thank you for your comment.
Yes, we can develop bespoke ceramic colours based on L*a*b* values. It will help the process if you have physical samples to send us or reflectance curves.
Please contact me at: [email protected]
so we can discuss this in greater depth and I can show you the colours that we already have available.
Patricia Le Coupanec
Gregory K. E. Hall
Yes, I would like to discuss how ceramic strips could be used the devices you mention.
If you E-mail me your ‘phone number I will call you at some convenient time.
My E-mail is [email protected]
Thank you for that information, it is very interesting.
Do you know what the colour standards are? What shape/size are the racks?
I wonder if any of our existing colours could be used, or if we would just have to develop some new colours?
colour standards are used for calbrating BacT/ALERT bacteriology analyzers by bioMerieux.
Four racks with different reflectance standards are used for getting readings of measurement cells during calibration and creation of calibration curve.
David (Dan) Morris
I would be very interested to learn more about the Colour Standards that you use to calibrate the spectrophotometric devices.
Yes, the big advantage that our Colour Standards have over plastic or printed ones is that they don’t change colour over time as they are ceramic. This means that we still have Colour Standards in service that were made in 1983 when we first started making them. Mind you, it also means that we don’t get much replacement business unless people damage or lose them. Even if they are soiled they can still be cleaned thanks to their durable surface!
Thank you for your comments, this is very interesting stuff.
We make permanent ceramic Colour Standards which are usually used to check the performance of spectrophotometers, but I think that it would be fairly straightforward to make small (5 x 5 x1mm) pieces that could fit on test strips and be used to check/calibrate optical sensors like you are describing. It might be easier than using glucose test solutions, although these also test the strips as well as the instruments, mind you, it must be difficult to decide if the solution, test strip or instrument are at fault if the reading is wrong.
I guess that now I need to speak to the manufacturers of these devices and the names you have mentioned will be a good starting place.
Again, many thanks for all your help.
If I can reciprocate in any way, please let me know.
David J. Benefiel, MD
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