Semi-quantitative test cocaine purity evaluation - NarcoCheck

Cocaine cuts (adulterants) identification test - NarcoCheck

A review of chemical 'spot' tests: A presumptive illicit drug identification technique - Philp - 2018 - Drug Testing and Analysis - Wiley Online Library

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Recent advances in microfluidic paper-based assay devices for diagnosis of human diseases using saliva, tears and sweat samples - ScienceDirect

Color Spot Test Vermont Forensic Laboratory

EZ Test Cocaine Purity for Cocaine Purity

Drug Checking Quarterly Report (Q3 2022): Philadelphia, Pennsylvania, USA

Saliva screening test for 5 drugs - NarcoCheck

Recent advances in the development of portable technologies and commercial products to detect Δ9-tetrahydrocannabinol in biofluids: a systematic review, Journal of Cannabis Research

Drug Purity Test Kits

SwabTek Cocaine Detection Test Kit

Electrochemical paper-based analytical devices: ten years of development - Analytical Methods (RSC Publishing) DOI:10.1039/C9AY02350J

Spot tests: past and present