Hi there,
I fixed my calibration setup and was successful with the liquid sample cuvette. Now, I'm moving onto a solid powder stage and had a few questions:
1.) I currently have silicon dioxide powder on hand, and was wondering if this was a reliable website to compare my spectrum to (https://ramanlife.com/library/silicon-dioxide/) or is this (https://sdbs.db.aist.go.jp/) the gold standard since I see you refer to it often. I couldn't find any other spectrums that would corroborate with the one given in the first site and the second site only has the IR spectrum, not Raman, so I can't use that one.
2.) Would you recommend packing the powder really tight rather than having it be loose with some clumps forming? I would think the former would be better to reduce scattering and improve the signal. I have a hydraulic press and die that I can use if that's a better sample preparation.
Best,
Bowen
Solid Powder Cuvette Question
Re: Solid Powder Cuvette Question
I did not know about the link you gave. There are other online spectral database but they aren't free; reason for which I tend to stick to SDBS.
About the powder, I recommend you press it but not necessarily with an hydraulic press. I just use the back of a drill bit to get something flat.
It's not always mandatory, sometimes it works without. But in some occasions the signal isn't good with fluffy powders for some reasons (maybe there is some preferred direction outside the reception cone)
About the powder, I recommend you press it but not necessarily with an hydraulic press. I just use the back of a drill bit to get something flat.
It's not always mandatory, sometimes it works without. But in some occasions the signal isn't good with fluffy powders for some reasons (maybe there is some preferred direction outside the reception cone)