Sub-Part-Per-Billion Level Sensing of Fentanyl Residues from Wastewater Using Portable Surface-Enhanced Raman Scattering Sensing.

Biosensors (Basel) · 2021 · PMC8534101 · PMID 34677326

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a decreasing trendno p-value reported

Moreover, Benton County has already shown a decreasing trend of opioid (non-tramadol) distribution over years based on the data from the OHA [ 43 ], which can explain the lower peak intensity in Figure 4 . 4.

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