What is the Role of Resistivity in Determining the Purity of Solvents?

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SUMMARY

The discussion centers on the role of resistivity in determining the purity of solvents, particularly in the context of thermoluminescence studies. The papers referenced, "Thermoluminescence of ultra-high dilutions of lithium chloride and sodium chloride" by Rey and "Thermoluminescence in ultra-high dilution research" by van Wijk et al., explore the effects of ultra-high dilutions. It is established that ultra-pure deionized water, with a resistivity of 18.2 mega-ohms, serves as a reliable indicator of solvent purity, as any presence of ions significantly decreases this resistance.

PREREQUISITES
  • Understanding of thermoluminescence and its applications in solvent analysis.
  • Knowledge of resistivity measurements and their significance in determining water purity.
  • Familiarity with ultra-high dilution techniques in scientific research.
  • Basic principles of ion presence and its effects on electrical resistance in solvents.
NEXT STEPS
  • Research the methods for measuring resistivity in solvents, focusing on high-purity water standards.
  • Explore advanced thermoluminescence techniques and their implications in purity assessments.
  • Investigate the impact of different ions on the resistivity of deionized water.
  • Study the role of ultra-high dilutions in alternative medicine and their scientific validation.
USEFUL FOR

Researchers in chemistry, particularly those studying solvent purity, thermoluminescence, and ultra-high dilution techniques, as well as professionals in quality control and laboratory settings.

Dr Bwts
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Thermoluminescence questions...

Hi,

First off apologies if this is in the wrong sub-forum.

I was given the following two papers to read...

Thermoluminescence of ultra-high dilutions of lithium chloride and sodium chloride.
Rey, L.
Physica A 323 (2003) 67–74.

Thermoluminescence in ultra-high dilution research.
van Wijk R, Bosman S, van Wijk EP.
J Altern Complement Med. 12(5) (2006) 437-43.

I don't expect anyone to read them just for reference.

One question kept bugging me. Given that the papers are looking at the effects of ultra high dilutions how can they be assured of the purity of the solvent in the first place?

From my understanding thermoluminescence is the re-emission of previously absorbed protons and the spectograph can give an indication of the structure. Is this correct?

Thanks for any help,

Dr. B
 
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I haven't looked up your papers yet, but if the solvent is water, the go to method for determining the purity is good old resistivity. Ultra pure deionized water has a resistivity of 18.2 mega-ohms, and that resistance drops extremely fast if there are any ions present.
 

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