Volatile compounds released from ancient remains can reveal how mummification practices evolved over more than two millennia, offering a new, non-destructive route into embalming chemistry.
Instead of dissolving samples, the team from the University of Bristol analyzed the air surrounding tiny mummy fragments using solid-phase microextraction, gas chromatography, and high-resolution mass spectrometry. Across 35 samples from 19 mummies spanning roughly 3200 BC to 395 AD, they identified 81 volatile organic compounds (VOCs) linked to embalming ingredients such as oils, resins, beeswax, and bitumen. “The findings mark a significant step forward in improving our understanding of Egyptian history and the fascinating ritual of mummification,” said lead author Wanyue Zhao in a press release. “Our analysis of the associated scents has uncovered new insights into how the practice developed through the ages and became increasingly sophisticated.”
The chemistry also tracks technological progress. Earlier mummies showed simpler profiles dominated by fats and oils, while later examples incorporated more complex – and costly – materials such as imported resins and bitumen. The results suggest that embalming became more elaborate over time, reflecting both growing expertise and access to wider trade networks.
Crucially, the chemical signatures varied not only by historical period but also by body region, hinting that embalmers tailored their recipes. “Samples from heads often contained different patterns than those from torsos, suggesting embalmers applied distinct recipes to separate parts of the body to possibly aid preservation,” Zhao explained, adding that further work is needed to understand why.
Beyond historical insight, the method itself could reshape how fragile remains are studied. By sampling VOCs in sealed environments, researchers can detect trace compounds without damaging artifacts. “Our volatile analysis proved sensitive enough to detect residues at extremely low concentrations,” said co-author Richard Evershed. The approach “presents a clearer, fuller picture of mummification recipes, material choices, and preservation strategies.”
For museum collections in particular, this offers a practical advantage. “Volatile analysis provides an effective and enlightening first step for studying embalmed remains across collections and time periods,” added Ian Bull.
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