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                            Library & Multimedia
 Objective Method for Presumptive Field-Testing of Illicit Drug Possession Using Centrifugal Microdevices and Smartphone Analysis
NCJ Number
              252283
Journal

*Analytical Chemistry* Volume: 88 Issue: 17 Dated: 2016 Pages: 8689-8697
Author(s)
          Shannon T. Krauss;
                        Thomas P. Remcho;
                        Shelby M. Lipes;
                        Roman Aranda IV;
                        Henry P. Maynard III;
                        Jingyi Li;
                        Richard . E. Tontarski Jr.;
                        James P. Landers
Date Published

2016
Length
              9 pages
Annotation
              This article details research into the use of inexpensive polyester-toner, rotation-driven microfluidic devices with a smartphone as a potential alternative for law enforcements current presumptive colorimetric field-testing of illicit drugs.
Abstract
              Current colorimetric presumptive identification of illicit drugs for determining illegal possession of controlled substances by law enforcement relies solely on the subjective interpretation of color change using drug- or class-specific reactions. The authors describe the use of inexpensive polyester-toner, rotation-driven microfluidic devices with a smartphone as a potential alternative for current presumptive colorimetric field-testing of illicit drugs, allowing for an objective and user-friendly image analysis technique for detection. The centrifugal microfluidic platform accommodates simultaneous presumptive testing of material from a single input to multiple reaction chambers, enabling rapid screening. Hue and saturation image analysis parameters are used to define threshold values for the detection of cocaine and methamphetamine as proof-of-principle with 0.25 and 0.75 mg/mL limits of detection, respectively, with nonvolatile reagents stored on-board and smartphone for detection. Reported LODs are lower than those concentrations used in the field. Additionally, the developed objective detection method addresses the testing of drugs with various common cutting agents, including those known to produce false negative and positive results. The authors demonstrate the effectiveness of the method by successfully identifying the composition of 30 unknown samples. (Publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2015-R2-CX-0033


  
  
        
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        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)
                                Report (Study/Research)
                                Report (Grant Sponsored)
                                Program/Project Description


  
  
        
  Award
        Cost-Effective Printed Microfluidic Devices for Rapid Screening of Narcotics at the Point of Interdiction
    
  
  
Date Published: January 1, 2016
    
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      PatentsRelated Topics
        
                Cocaine
        Novel psychoactive substances
        Police equipment
        Drugs
        Drug analysis



  
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