Objective: This study details the determination of mitragynine in various kratom samples using the thin-layer chromatography (TLC) technique and validation of analytical methods for quantifying the concentration of mitragynine in various kratom samples using liquid chromatography with photodiode array detector (LC-PDA).
Methods: TLC technique using n-hexane: ethyl acetate: ammonia 25% (30: 15: 1 v/v/v) was applied to isolate mitragynine from kratom samples. Several interesting spots obtained were visualized under UV light at 254 nm. Samples were also prepared with organic solvent extraction directly prior to LC analysis (non-isolation method of preparation) to quantify the concentration of mitragynine. Mobile phases used were acetonitrile (MP A) and 0.1% formic acid in water (MP B). Samples and standards were run by gradient elution with a flow rate of 0.3 ml/min, detection using PDA detector at 254 nm.
Results: Mitragynine was successfully isolated from kratom samples in Rf 0.50 by TLC system applied. The validation of analytical methods for mitragynine passed the acceptance criteria as described by UNODC Guidance. The concentration of mitragynine in various kratom samples seized in Indonesia ranged from 0.37%-1.70% (%w/w).
Conclusion: Both TLC and LC analytical methods could be applied to determine and quantify the concentration of mitragynine in each examined sample, respectively.
Introduction:
Drug abuse is a real threat that threatens the Indonesian nation in the form of non-military threats. The second most abused illicit substance in the world is methamphetamine (MA). Most of the methamphetamine users in the world live in East and Southeast Asia. Methamphetamine is a powerful stimulant of the central nervous system (CNS) that can make someone feel an increase in sympathomimetic.
Method:
First, the preliminary test was conducted using a BioCare multi-drug rapid test and a specific methamphetamine rapid test that works based on the Lateral Flow Assay (LFA) principle. Second, the sample preparation used Liquid-Liquid Extraction (LLE). Third, GC-MS confirmed the test using GC-MS Shimadzu-QP2020NX-GC-2030 (HP-5MS column, Length 30 m, diameter 0.25 m, film 0.25).
Result and Discussion:
The Preliminary test shows that the urine is positive and contains methamphetamine and amphetamine. Based on the sample chromatogram, There are 2 peaks, which are methamphetamine and amphetamine compounds it can be seen by the retention time is 5.560 minutes (methamphetamine) a similarity index of 98% to methamphetamine compounds, and 4.885 minutes (amphetamine) with a similarity index of 96% to amphetamine compounds.
Conclusion:
The urine samples with code 210DGB from methamphetamine users were detected due to the presence of methamphetamine and amphetamine, which is the metabolite of methamphetamine.
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