Abstract
Artemisia absinthium (wormwood), a common ingredient in absinthe, contains the compound thujone, which is unregulated by the U.S. Drug Enforcement Agency. Thujone can cause an "unregulated legal high" in higher concentrations. The European Union limits thujone from Artemisia species to 35mg/kg while the U.S. Food and Drug Administration requires less than 10ppm to be "thujone-free." However, individuals can smoke or ingest A.absinthium in different forms. This study developed a polymerase chain reaction (PCR) high-resolution melt (HRM) assay to detect and identify A.absinthium based on primer specificity, sensitivity, repeatability, and robustness. A triplex assay was performed with three "unregulated legal high" species: Datura stramonium, Merremia tuberosa, and A.absinthium; the PCR HRM assay detected and identified each plant at melt temperatures 77.42±0.20°C, 83.88±0.22°C, and 87.77±0.15°C, respectively. The primer set developed distinguished A.absinthium from a variety of plant species and was successfully triplexed.
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