Mdma mda mde

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John T. Cody, in Handbook of Analytical Separations While this would cause a problem with many GC detectors, the mass spectrometer was easily able to selectively monitor the unique ions for each of the analytes and distinguish them from one another. In addition, it is unlikely to find both MDMA and MDEA abused at the same time, therefore the likelihood of a sample having both of the compounds in them would be low.

Other investigators have also reported enantiomer separation using chiral prolyl derivatives [—]. Fallon et al. The assay showed close agreement between actual and measured enantiomer composition at three different concentrations and four different ratios. MTPA was used by a of other authors as noted earlier for the analysis of amphetamine and related compounds.

This method was used for the separation of amphetamine and methamphetamine enantiomers [89].

Mdma mda mde

Methamphetamine enantiomers were separated by 0. Since both enantiomers elute close together, it is important to carefully evaluate which enantiomer peak is being evaluated by the instrument data system. Peters et al. The enantiomers were derivatized with S -heptafluorobutyrylprolyl chloride and separated using a GC. The increased sensitivity afforded by negative ion chemical ionization allowed the use of a sample size of 0. In a subsequent publication describing the metabolic profile of MDMA following administration of the drug in a controlled study by the same author, a thorough validation of the assay was also delineated [87].

The method was linear within a range 0. Chemical ionization was accomplished with methane with an emission current of mA. Analysis of MDMA and related regioisomers has been described by several authors, helping to ensure these closely related compounds can be readily differentiated [—]. The combination of the mass spectral characteristics and particularly the chromatographic behavior of these analytes are described by both groups relative to their importance for the proper identification of these compounds. Optimization showed that very slow program rates gave the best separation on non-polar stationary phases but the run time upwards of 85 min was impractical.

The use of narrow bore capillary columns with the same phases improved the analysis time to approximately half an hour due to their enhanced resolving power. Robert M. White Sr. Both exist in two stereoisomeric forms. The d and l forms of amphetamine and the d form of methamphetamine have stimulatory activity.

The l form of methamphetamine is active only as an antihistamine. A seemingly innocuous elevation of the pH of a spiking solution or a finished synthetic or human oral fluid product can be disastrous for identifying cocaine and 6-acetylmorphine. Although very few stability issues have arisen with the methylenedioxy drugs, it is worth noting that the methylenedioxy ring is the ether form of a geminal diol.

Geminal diols 15 are noted for their instability, which in the case of the methylenedioxy compounds is greatly stabilized by being present as a diether but may be a potential area for unwanted chemical reactions. In the above discussion, it is again noteworthy that hydrochloride salts may contribute unwanted acidity and lowering of the pH of a spiking solution. Conversely, use of the free base may result in an undesirable rising of the pH of a spiking solution.

Amphetamines and other sympathomimetic amines incorporate into hair. The hair specimen 3 cm was digested with sodium hydroxide, followed by solid phase extraction and derivatization with pentafluoropropionic anhydride. The concentrations of amphetamine in 20 volunteers studied varied from 0. There are many other published methods for analysis of amphetamine and related drugs in hair specimens.

Wennig, in Human Toxicology Impurities may give rise to some concern []. It is particularly difficult to make a distinction between the many possible isomers [—]. Testing for amphetamine, methamphetamine, and other phenethylamine compounds focuses primarily on detection of amphetamine, methamphetamine, and deer drugs often grouped together as Ecstasy and related compounds MDMA, MDA, and MDEA and bath salts.

One concern for immunoassay screening is false-positive due to cross-reactivity of the reagent antibodies to other sympathomimetic amines such as ephedrine, pseudoephedrine, phentermine, and phenylpropanolamine. Periodate treatment of samples prior to immunoassay screening or mass spectrometric confirmation analysis can be used to remove interference by sympathomimetic amines. Isomer resolution procedures using chiral columns or derivatization using optically pure chiral derivatizing agents are necessary to distinguish d - and l -stereoisomers, which are not distinguishable by immunoassay screening and most confirmation procedures.

Another concern for immunoassay screening is the unavailability of assays that detect many of the newer deer amphetamines such as those classified as bath salts. Larry A. Federally regulated workplace drug testing has always included testing for amphetamine and methamphetamine, and in October screening for the synthetic stimulant 3,4-methylenedioxymethamphetamine MDMA; Ecstasy with confirmation testing for MDMA, 3,4-methylenedioxyamphetamine MDAand methylenedioxyethylamphetamine MDEA was added. On October 1, MDEA was removed as a drug to be tested for federal workplace testing but may still be tested for nonfederal workplace samples.

These compounds and others with similar structures and properties such as pseudoephedrine, ephedrine, propylhexedrine, phenylephrine, phenmetrazine, and phentermine available by prescription or as over-the-counter OTC treatments for nasal congestion and appetite suppression are known as sympathomimetic amines. Several approaches have been taken to minimize the occurrence of false-positive with amphetamines immunoassays [5]. These approaches include performing a second immunoassay screen from a different manufacturer using an immunoassay with different cross-reactivity or pretreatment of samples with sodium periodate to eliminate interference from sympathomimetic amines.

Another method for differentiating true positives from false positives is neutralization of the al in a true-positive sample by the addition of antibody to the target analyte [6]. Using serial dilution testing and optimal slope cutoffs determined by ROC analysis enabled Woodworth et al.

Mdma mda mde

Another approach is to combine both immunoassays and mass spectrometry procedures for performing drug screening [5]. Interpretation of these should consider several factors including possible further testing for optical isomers and investigation of medications and supplements ingested.

Primary examples are the presence of l -methamphetamine in Vicks inhaler, which can't be distinguished from use of illicit methamphetamine d isomer or racemic mixture depending on method of productionthe excretion of l methamphetamine and l amphetamine by patients taking selegiline for Parkinson's, and the excretion of d and l amphetamine and methamphetamine by patients taking the analgesic famprofazone [8].

Studies have shown that heavy use of the inhaler can cause false-positive but that when the inhaler was used as directed no false positive were obtained [9]. Isomer resolution can be accomplished using a chiral, optically active column or chiral derivatizing reagents [10]. Chiral columns such as N-3,5- dinitrobenzoyl phenyl-glycine or beta cyclodextrin products can differentiate d and l isomers, or enantiomers, of amphetamines for GC and liquid chromatography LC methods [3]. Positive amphetamines can be obtained due to ingestion of medications containing amphetamine, methamphetamine, or compounds metabolized to these compounds.

Amphetamine [Dexedrine d -amphetamineAdderall d and l -amphetamineetc] and methamphetamine [Desoxyn d -methamphetamine ] are the active compounds of medications prescribed for appetite suppression, narcolepsy, and attention deficit disorder and ingestion of these drugs will result in true positive due to excretion of these compounds in the urine. Some weight loss or nutritional supplements contain fenproporex and use of these supplements has resulted in detection of d -amphetamine in the urines of users [12].

Another important consideration when interpreting confirmation for amphetamines is the possibility of false negative due to destruction of the compounds or false positive due to generation of the compounds during the procedure [9]. Derivatization using compounds such as heptafluorobutyric anhydride HFBApentafluoropropionic anhydride PFPAtrifluoroacetic anhydride TFAA4-carboxyhexafluorobutyryl chloride 4-CBN-methyl-N- t -butyldimethylsilyl trifluoroacetamide MTBSTFAN-trifluoroacetylprolyl chloride TPC2,2,2-trichloroethyl chloroformate, and propylchloroformate decreases the volatility of amphetamines in addition to improving chromatography and quantitation, and forming higher molecular weight fragments yielding different mass ions and ion ratios than potentially interfering compounds [9].

Contaminants in the heptafluorobutyryl derivatizing reagent have been shown to give methamphetamine peak interferences when ephedrine is present in the sample [16]. Lowering the injector temperature and periodate pretreatment of samples are two procedures used to prevent generation of methamphetamine.

Mdma mda mde

Periodate treatment 0. Inclusion of a quality control sample containing a high concentration of sympathomimetic amines in each confirmation batch can be used to monitor the effectiveness of the periodate oxidation procedure [9]. Jemionek et al. Hydroxynorephedrine, norephedrine, norpseudoephedrine, phenylephrine, and propylhexedrine are other compounds with structures similar to amphetamine and methamphetamine that may be tested for interference [21]. When testing for deer amphetamines such as MDMA and MDA the laboratory must be aware of the metabolism and excretion patterns for these drugs because some of the metabolites 3,4-dihydroxymethamphetamine HHMA ; 3,4-dihydroxyamphetamine HHA ; 4-hydroxymethoxymethamphetamine HMMA ; and 4-hydroxymethoxyamphetamine HMA are excreted as glucuronide and sulfate conjugates.

In order to obtain adequate recovery of these metabolites a hydrolysis procedure should be included as part of the confirmation testing [9,21,22]. Rothe et al. Amphetamine was detected in 17 out of 20 samples, but methamphetamine was not detected in any sample. Cooper et al.

Mdma mda mde

The hair samples were analyzed in two 6 cm segments or in full, ranging from 1. Of the segments analyzed, 77 In one study, seven volunteers with a history of stimulant use received four doses of 10 mg of sustained release methamphetamine within 1 week. Weekly head hair samples were collected by shaving.

After 3 weeks, four volunteers received four doses of 20 mg doses, followed by weekly sample collections. Maximum concentration of methamphetamine occurred from 1—2 weeks after both doses. Marc, P. Mura, in Encyclopedia of Forensic and Legal Medicine The substances targeted are the most common illicit drugs, e.

If any of these substances are detected, then the driver is considered guilty of an offense. Those who may be subject to the test include anyone who is driving or about to drive in a public place, anyone pd to be responsible for a car accident, or anyone who could have contributed to its cause. Hartelius, in Encyclopedia of Forensic Sciences These comprise a large group, including such highly diverse substances as amphetamine and mescaline.

These drugs can be divided into two subgroups: mainly euphoriant or mainly hallucinogenic. They may cause severe neurotoxic reactions due to serotonin depletion e. The predominantly hallucinogenic psychotomimetic PEAs include e. These drugs may cause or trigger psychotic reactions.

The total of drugs in this class is estimated to be several hundred. Figure 4. Set alert. About this. Forensic Science John T. Cody, in Handbook of Analytical Separations3. View chapter Purchase book. Analysis of drugs of abuse in serum, hair, oral fluid, sweat, and meconium Amitava Dasgupta, in Alcohol, Drugs, Genes and the Clinical LaboratoryAnalysis of amphetamine Amphetamines and other sympathomimetic amines incorporate into hair.

Laboratory diagnosis of poisonings R. Wennig, in Human ToxicologyEntactogens. Challenges in confirmation testing for drugs of abuse Larry A. Broussard, in Accurate in the Clinical Laboratory Second EditionConfirmation of amphetamines Federally regulated workplace drug testing has always included testing for amphetamine and methamphetamine, and in October screening for the synthetic stimulant 3,4-methylenedioxymethamphetamine MDMA; Ecstasy with confirmation testing for MDMA, 3,4-methylenedioxyamphetamine MDAand methylenedioxyethylamphetamine MDEA was added.

Hartelius, in Encyclopedia of Forensic SciencesPhenetylamines PEAs These comprise a large group, including such highly diverse substances as amphetamine and mescaline.

Mdma mda mde

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