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Fig. 7 | Harm Reduction Journal

Fig. 7

From: Point-of-care community drug checking technologies: an insider look at the scientific principles and practical considerations

Fig. 7

Illustration of the challenges with competitive adsorption in SERS. a and b represent two solutions with the same concentration of fentanyl, however b is in the presence of a competitive analyte with greater affinity to the gold nanoparticles than fentanyl. Despite having the same concentration of fentanyl in both solutions, the SERS spectrum may look significantly different. In the extreme case, fentanyl may give no signal in scenario (b)

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Harm Reduction Journal

ISSN: 1477-7517