The Scott test has been used for over 50 years as a presumptive test for cocaine.   It involves a series of reagent additions and color changes...and if it's not done and interpreted correctly, it can send innocent people to jail.  This crystal structure now published in Acta Cryst E gives insight into what's going on in the test.  

Bis(N,N-diethyl-4-methyl-4-piperazine-1-carboxamide) tetra­kis­(iso­thio­cyanato-κN)­cobalt(II), a model compound for the blue color developed in the Scott test. Oliver, A. G., Lockwood, T.-L. E., Zinna, J. & Lieberman, M. (2023). Acta Cryst. E79, 163-166

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This paper shares a tandem mass spectroscopy method for quantitative analysis of 22 drugs and drug metabolites. The samples were harvested from used idPADs;  we used this method, along with fentanyl and benzo test strips, to analyze 124 samples of illicit drugs collected from the Chicago area in 2021-2022.  …

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This commentary article, "Considerations for the design and implementation of point-of-care technology for use in low- and middle-income countries," uses the PAD project to reflect on why some technologies can be implemented in low-resource…

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