1997
DOI: 10.1021/ac970196u
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Determination of Ecgonidine Methyl Ester Vapor Pressure Using a Dynamic Gas Blending System and Gas Chromatographic Analysis

Abstract: Ecgonidine methyl ester (EDME), a product of the thermal decomposition of cocaine, has been identified as a likely candidate for the detection of concealed cocaine by vapor sniffing. Using a continuous-flow vapor generator preconcentration/thermal desorption technique in combination with GC-TSD analysis, the vapor pressure of EDME was measured between −20 and +20 °C, and the results were fitted into the following equation:  log P = 16.6 − (3.64 × 103/T), where P is in parts per billion and the temperature is i… Show more

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Cited by 14 publications
(11 citation statements)
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“…), também absorve solventes orgânicos, no caso da pasta base, e o produto de queima da COC, denominado éster metilanidroecgonina, pelo fato de esta ser submetida a altas temperaturas no ato de fumar. Neste caso, a disponibilidade química da COC, que em média é de 70%, depende de vários fatores, dentre eles, a temperatura empregada para vaporização, o recipiente onde a droga é aquecida, além da efetividade da tragada que depende da experiência do usuário (CONE; HILLSGROVE; DARWIN, 1994;CONE, 1995;JACOB et al, 1990;KINTZ et al, 1995;NAKAHARA;ISHIGAMI, 1991;NEUDORFL et al, 1997;HODGE;PAUL, 2001). …”
Section: Absorçãounclassified
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“…), também absorve solventes orgânicos, no caso da pasta base, e o produto de queima da COC, denominado éster metilanidroecgonina, pelo fato de esta ser submetida a altas temperaturas no ato de fumar. Neste caso, a disponibilidade química da COC, que em média é de 70%, depende de vários fatores, dentre eles, a temperatura empregada para vaporização, o recipiente onde a droga é aquecida, além da efetividade da tragada que depende da experiência do usuário (CONE; HILLSGROVE; DARWIN, 1994;CONE, 1995;JACOB et al, 1990;KINTZ et al, 1995;NAKAHARA;ISHIGAMI, 1991;NEUDORFL et al, 1997;HODGE;PAUL, 2001). …”
Section: Absorçãounclassified
“…de ionização e capacidade de atravessar membranas para alcançar diferentes compartimentos do organismo (CONE, 1998 DARWIN, 1994;CONE, 1995;JACOB et al, 1990;KINTZ et al, 1995;NAKAHARA;ISHIGAMI, 1991;NEUDORFL et al, 1997;HODGE;PAUL, 2001). …”
Section: Toxicocinéticaunclassified
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“…The two decomposition compounds of cocaine have a higher volatility and offer target chemical markers for the detection of cocaine. Ecgonidine methyl ester has been identified in the headspace of bulk cocaine samples, having a vapor pressure of 5 orders of magnitude greater than that of cocaine [109]. Ecgonidine methyl ester is also one of the metabolites of cocaine, detected from hair and urine samples of people that smoke "crack," a cocaine product [110,111].…”
Section: Cocainementioning
confidence: 99%
“…[49,50] Methyl benzoate and EDME are possible target candidates for SPME-IMS detection of cocaine because the vapor pressure of EDME and methyl benzoate is 5 and 7 orders of magnitude higher than cocaine, respectively. [51] Shown in Table 8 is the vapor pressure of the reported impurities found in cocaine. As seen, some of these compounds have much high vapor pressure compared to cocaine itself (0.37-1.2 x 10 -7 torr at 20 °C).…”
Section: Scheduling Of Controlled Substancesmentioning
confidence: 99%