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I am currently doing a research project, and for it, I would like to use a photospectrometer to find the concentration of Calcium Perchlorate in my sample solutions. My current method of data collection relies on using an indicator (methalyne blue) to form a purple precipitate to observe under a microscope as a qualitative means to collect data, but if I can use a spectrophotometer (96 well) to directly measure absorbance and in turn concentration, that wold be heavily preferred.

How would I be able to find out what specific wavelength I need to measure for my Calcium Perchlorate? I can't find any preexisting values online for Calcium Perchlorate, so any help would be greatly appreciated. Thank you!

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    $\begingroup$ Apparently, calcium perchlorate is a yellow-white crystalline solid, so just prepare a solution at some reasonable concentration and run a UV-Visible absorbance scan from 200 nm to 900 nm. If you get absorbances that are very small, use a higher concentration. $\endgroup$
    – Ed V
    Dec 2, 2021 at 18:23
  • $\begingroup$ @EdV I'll give that a shot, thanks! $\endgroup$ Dec 2, 2021 at 18:33
  • $\begingroup$ @EdV, seems like a good answer, why not make it one? $\endgroup$ Dec 2, 2021 at 18:52
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    $\begingroup$ @edV funny you say that! i'm actually doing an experiment on phytoremediation of calcium perchlorate concentrations seen on potential human Mars landing zones :). $\endgroup$ Dec 2, 2021 at 22:22
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    $\begingroup$ @EdV sorry I didn't realize that's return comments on mobile, but i'm definitely gonna give it a shot in the upcoming days, thank you so much for the insight, it really helps! $\endgroup$ Dec 2, 2021 at 22:25

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