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Heroin detection by raman spectroscopy from impure compositions comprising an interfering fluorescent contaminant

A technology of Raman spectroscopy and Raman spectrometer, applied in the field of detecting heroin from impure compositions containing interfering fluorescent pollutants by Raman spectroscopy, which can solve difficult operations, wrong arrest or release of suspects, troubles, etc. question

Active Publication Date: 2016-08-10
THERMO SCI PORTABLE ANALYTICAL INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Difficulties for law enforcement personnel in related fields to identify, at least initially, any specific substance that may be a prohibited substance
This could lead to the wrongful apprehension or release of suspects who were indeed in possession of such illegal drugs
While a suitably equipped laboratory can perform definitive analyses, typical laboratory equipment is unsuitable for use by law enforcement personnel in related fields because it is either too heavy, cumbersome, difficult to operate, or too expensive to be widely distributed to a large number of Law enforcement officers

Method used

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  • Heroin detection by raman spectroscopy from impure compositions comprising an interfering fluorescent contaminant
  • Heroin detection by raman spectroscopy from impure compositions comprising an interfering fluorescent contaminant
  • Heroin detection by raman spectroscopy from impure compositions comprising an interfering fluorescent contaminant

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Embodiment Construction

[0026] Embodiments of the present invention provide a method of identifying the presence of heroin in an impure heroin composition comprising heroin and at least one fluorescent contaminant that interferes with the Raman signal from the heroin. The amount of heroin contained in the sample may range from as low as 2%, 10%, 30% or 50% to any of 60%, 70%, 80% or even 100%. These percentages, and any other percentages herein, unless expressly mentioned otherwise, are percentages by weight. "Heroin" as used herein refers to heroin in any form, whether hydrochloride or other salt, or free base (ie, absent or substantially absent in the salt form). Various types of fluorescent contaminants have been described above. The amount of such contaminants that can be used can range from any one of 1%, 5%, 10%, 30%, 50%, 95%, or more. These contaminants interfere with the Raman signal of heroin by producing a broad emission at multiple wavelengths that overlaps, in whole or in part, with an...

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Abstract

A method of identifying the presence of heroin in an impure heroin composition which contains heroin and at least one fluorescent contaminant which interferes with a Raman signal from the heroin. The method may include contacting the mixture with a solvent such as an alcohol, then contacting the resulting alcohol composition with a SERS surface. The surface may then be exposed to laser light from a hand-held Raman spectrometer to detect a Raman signal from the heroin. An apparatus for performing the method is also provided.

Description

[0001] This application is a divisional application of an invention patent application. The application date of the parent application is July 13, 2012, the application number is 201210246266.5, and the title of the invention is "Using Raman spectroscopy to extract Detection of heroin in pure composition". technical field [0002] The present invention generally relates to the detection by Raman spectroscopy of the presence of heroin in impure compositions that may contain a contaminant that would normally interfere with the Raman signal from heroin. Background technique [0003] Raman spectroscopy is an effective tool for identifying and characterizing a wide variety of substances. In Raman spectroscopy, light, typically from a laser, of a known wavelength (typically infrared or near infrared) is directed at a sample. The laser light (sometimes called Raman pumping) interacts with the electron cloud in the sample molecules and undergoes a selected wavelength shift due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65G01N21/94G01N33/94
CPCG01N21/658G01N21/94G01N33/9486G01N2021/646G01N21/8483G01J3/44G01N21/65G01N2021/656G01N2201/0221G01N2201/06113
Inventor C·M·加纳M·D·哈格里夫斯王培栋沈育
Owner THERMO SCI PORTABLE ANALYTICAL INSTR INC
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