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Electrochemically co‐deposited sol–gel/Cu nanocomposites have been introduced as a novel, simple and single‐step technique for preparation of solid‐phase microextraction (SPME) coating to extract methadone (MDN) (a synthetic opioid) in urine samples. The porous surface structure of the sol–gel/Cu nanocomposite coating was revealed by scanning electron microscopy. Direct immersion SPME followed by...
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