GHB Carbon Footprint Source Identification
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Solution Overview
Problem
The challenge is to trace the origin of gamma-hydroxybutyrate (GHB) to differentiate between legitimate and illicit sources, given its high abuse potential and ease of illegal manufacture, which is difficult due to its colorless, odorless, and salty taste, making it hard to detect in urine samples and linked to drug-related sexual assaults.
Innovation Solution
Gamma-butyrolactone (GBL) and gamma-hydroxybutyrate (GHB) are formulated with a unique carbon footprint by varying biobased and petroleum-based starting materials, allowing for the creation of a mixture with controlled percent modern carbon (pmc), enabling identification of the source through their carbon signature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GHB is manufactured using conventional methods without traceability markers, then production cost and manufacturing simplicity are maintained, but the ability to trace the origin and differentiate between legitimate and illicit sources is lost
Solution Approach 1:
The patent applies parameter changes by modifying the carbon isotopic composition (pmc values) of GHB products. By controlling the percentage of modern carbon from biobased materials versus fossil-based materials, each legitimate manufacturer produces GHB with a distinctive carbon footprint signature. This allows law enforcement to trace and differentiate GHB sources without adding physical traceability devices, resolving the contradiction between traceability precision and manufacturing complexity.
2Reliability
If GHB is produced from biobased materials with unique carbon footprints, then source identification capability is improved, but production costs and process complexity increase
Solution Approach 1:
The patent changes the chemical parameter of carbon isotopic composition by using biobased materials with known pmc values. Manufacturers can control the blend ratio of biobased and fossil-based precursors to create unique carbon footprints for their products. This approach maintains manufacturing simplicity while establishing reliable source identification, as the carbon signature is inherent in the raw materials rather than requiring additional manufacturing steps.
Solution Approach 2:
The patent uses the natural carbon isotopic signature as a fingerprint that copies the origin information from biobased materials into the final GHB product. This copying mechanism allows source identification without modifying the manufacturing process, as the carbon footprint is automatically imprinted during production from the chosen raw materials.
3Quantity of substance
If GHB is made colorless and odorless for legitimate use, then product purity and acceptance are maintained, but detection and tracking capabilities are reduced
Solution Approach 1:
The patent introduces carbon isotopic composition as an intermediary parameter that does not affect the sensory properties of GHB but enables detection and tracking. The carbon footprint serves as a hidden identifier that law enforcement can detect through isotopic analysis without altering the appearance, odor, or taste of the substance, thus maintaining its acceptability while enabling detection capabilities.
Data Source
AI summary
Gamma-butyrolactone (“GBL”) and Gamma-hydroxybutyrate (“GHB”) having a unique carbon footprint as defined by the percent modern carbon (pmc) are described herein. The percent modern carbon can be controlled by varying the amounts of biobased, renewable starting materials and petroleum-based starting materials to prepare GBL or GHB having a defined pmc or by preparing mixtures of GBL or GHB prepared from biobased renewable starting materials and GBL or GHB prepared from petroleum-based starting materials.