Drugs of abuse in tap water from eight European countries: Determination by use of supramolecular solvents and tentative evaluation of risks to human health
Author
Muñiz Bustamante, Luis
Caballero-Casero, Noelia
Rubio Bravo, Soledad
Publisher
ElsevierDate
2022Subject
Drugs of abuseDrinking water quality
Supramolecular solvents
Liquid chromatography–mass spectrometry
Exposure risk assessment
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Show full item recordAbstract
Recent research findings have confirmed the presence of illicit drugs in tap water from some European Union
(UE) member states. Contaminants in tap water come directly from drinking water sources such as rivers or lakes
owing to inefficient removal at wastewater treatment and water purification plants. This work was aimed at
setting a starting point for assessing the health risks of exposure to twelve drugs of abuse through consumption of
tap water in the European population. For this purpose, a method using supramolecular solvents (SUPRAS) was
developed to extract drugs in the opioid, amphetamine, cocaine and cannabinoid groups from tap water for their
determination by liquid chromatography–tandem mass spectrometry (LC–MS/MS). A total of 119 tap water
samples were collected from eight EU countries for analysis. Seven drugs were found at concentrations from 0.3
to 340 ng/L in 72 of the samples (60.5%). The mean exposure to the drugs through consumption of tap water was
calculated to be 0.0064–3.531 ng/kg⋅day for adults and 0.0247–6.7580 ng/kg⋅day for children, whereas that
resulting from dermal contact was estimated to be 4–7 orders of magnitude lower. Exposure values were
compared with the minimum required performance levels (MRPL) for the drugs in urine set by the World Anti-
Doping Agency (WADA). Based on the results, a need clearly exists for further research into the adverse effects on
health of inadvertent, sustained exposure to low doses of drugs of abuse.