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Chemistry and Chemists № 1 2026 Journal of Chemists-Enthusiasts |
Owls, Cats, and Soxhlet Apparatus Chemist |
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What do these two pictures have in common?
A Soxhlet apparatus (extractor) is designed for the continuous extraction of substances from solid samples with a liquid. For example, in my youth, I had to extract fat from salted fish with petroleum ether. The fat content was one of the quality indicators of this product. Finding Soxhlet apparatuses among the measuring vessels was a surprise to me. Colleagues told me that this laboratory used to have platinum crucibles and platinum evaporating dishes up to 50 cm in diameter (!), designed for the chemical breakdown of uranium ore, but no one remembered this laboratory ever performing extractions using Soxhlet apparatuses. Later, I found several more Soxhlet extractors, some still in their original packaging. Still later, I discovered an old black-and-white photograph that explained everything. It showed a row of six Soxhlet extractors, performing extraction simultaneously. I suspect it captured the process of uranium extraction from ore with nitric acid, but whether that is true, we will never know. All that remains is the photograph and receipts for the "secret briefcases" (apparently containing ore samples). The last employee who participated in this work died a year ago at the age of 90. In his time, he had visited many uranium mines in our country and in others. |
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