Sample preparation of amphetamine and methamphetamine by means of supported liquid membrane technique for high-performance liquid chromatography analysis

Trocewicz, Jerzy

doi:10.1002/1615-9314(20010801)24:7<587::aid-jssc587>3.0.co;2-3

Cited by 16 publications

(7 citation statements)

References 18 publications

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“…Whilst these techniques are accurate with a detection limit of 0.1 µg mL -1 , the samples typically require pre-processing in order to separate the target drug from diluent which is heavily cut with other white powder(s) such as glucose and/or caffeine. Several preparation steps are required in a typical quantitative analysis, which complicate the procedure, are costly and time-consuming [4][5][6] . Moreover, these operations require access to dedicated test facilities.…”

Section: Introductionmentioning

confidence: 99%

Amine-rich carbon nanodots as a fluorescence probe for methamphetamine precursors

Brown

Cresswell

et al. 2015

Anal. Methods

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Amine-functionalized carbon dots (A-CDs) were synthesized by one-step hydrothermal reaction of urea and citric acid. The purified CD sample exhibits a surface states dominated fluorescence emission with a quantum yield of 30%. The A-CDs demonstrate excellent sensitivity toward methamphetamine pre-precursor and precursor, and a remarkable selectivity against common drug cutting agents (diluents) such as Aspirin, Paracetamol, etc. The specific selectivity of CDs towards such type of drug precursor molecules is first time reported, which appears to be related to the spatial distribution of the surface functional groups. The fluorescence-based sensing mechanism is revealed by a detailed analysis on the static and dynamic fluorescence behaviour. We further demonstrated an immobilization strategy for fabricating solid-state sensors, and the retained sensitivity of the A-CDs after immobilization. The study reveals the potential of the use of a CDs as an effective sensing probe for illicit drugs, which is in demand.

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Section: Introductionmentioning

confidence: 99%

Amine-rich carbon nanodots as a fluorescence probe for methamphetamine precursors

Brown

Cresswell

et al. 2015

Anal. Methods

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“…Flat-sheet SLM (three-phase) [1][2][3][4]14,15,20,[24][25][26][27][28][29][30][31]36,37,40,59,60,84,90,[107][108][109]114,120,161,[176][177][178][179][180][181] Flat-sheet MMLLE (two-phase) [59][60][61]104,116,162,172 Three-phase LPME (hollow fiber) Static 5,9,10,12,21,23,38,64,65,67,68,[74]…”

Section: Methods Mode Referencesmentioning

confidence: 99%

“…115 Two-phase flat-sheet membrane extraction combined with capillary electrophoresis was applied to a number of substituted anilines and naphthylamines and 4-aminobiphenyl with LODs of 160-7500 ng l À1 . 120 Aliphatic amines (methyl-to hexylamine) were extracted with dynamic two-phase LPME and simultaneous derivatization, followed by GC-MS analysis. 117 Another variation of membrane extraction studied by the same authors involved the use of a volatile organic solvent placed as a drop on the sample.…”

Section: Aminesmentioning

confidence: 99%

Membrane-Based Extraction for Environmental Analysis

Jönsson

2012

Comprehensive Sampling and Sample Preparation

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“…In the analysis process for MAP, sample pretreatment plays the key role, which determines the detection efficiency. To date, several pretreatment technologies have been reported to assess MAP in human urine sample , such as LLE , SPME , single‐drop liquid microextraction and so on. During the SPE or traditional LLE, a large amount of toxic organic solvent and time have to be involved.…”

Section: Introductionmentioning

confidence: 99%

Ionic‐liquid‐based dispersive liquid–liquid microextraction coupled with high‐performance liquid chromatography for the forensic determination of methamphetamine in human urine

Wang

Zhao

et al. 2016

J of Separation Science

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Determination of methamphetamine in forensic laboratories is a major issue due to its health and social harm. In this work, a simple, sensitive, and environmentally friendly method based on ionic liquid dispersive liquid-liquid microextraction combined with high-performance liquid chromatography was established for the analysis of methamphetamine in human urine. 1-Octyl-3-methylimidazolium hexafluorophosphate with the help of disperser solvent methanol was selected as the microextraction solvent in this process. Various parameters affecting the extraction efficiency of methamphetamine were investigated systemically, including extraction solvent and its volume, disperser solvent and its volume, sample pH, extraction temperature, and centrifugal time. Under the optimized conditions, a good linearity was obtained in the concentration range of 10-1000 ng/mL with determination coefficient >0.99. The limit of detection calculated at a signal-to-noise ratio of 3 was 1.7 ng/mL and the relative standard deviations for six replicate experiments at three different concentration levels of 100, 500, and 1000 ng/mL were 6.4, 4.5, and 4.7%, respectively. Meanwhile, up to 220-fold enrichment factor of methamphetamine and acceptable extraction recovery (>80.0%) could be achieved. Furthermore, this method has been successfully employed for the sensitive detection of a urine sample from a suspected drug abuser.

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Sample preparation of amphetamine and methamphetamine by means of supported liquid membrane technique for high-performance liquid chromatography analysis

Cited by 16 publications

References 18 publications

Amine-rich carbon nanodots as a fluorescence probe for methamphetamine precursors

Amine-rich carbon nanodots as a fluorescence probe for methamphetamine precursors

Membrane-Based Extraction for Environmental Analysis

Ionic‐liquid‐based dispersive liquid–liquid microextraction coupled with high‐performance liquid chromatography for the forensic determination of methamphetamine in human urine

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