2011
DOI: 10.1016/j.chroma.2011.02.064
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Direct injection of native aqueous matrices by achiral–chiral chromatography ion trap mass spectrometry for simultaneous quantification of pantoprazole and lansoprazole enantiomers fractions

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Cited by 48 publications
(45 citation statements)
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“…Matrix effect is attributed to the effect of matrix composition on the electrospray ion source, which will affect the ionization capacity of the compounds and their signal response [43]. Although the values differ between different compounds due to their different chemical nature, the sample preparation procedure in this method is adequate and values achieved for matrix effects are acceptable and considered better than similar published works, allowing low quantification limits in the order of ng L −1 [16,34,43]. Table 6 gives the matrix effects of all enantiomers as the percentage ratio between the post-spiked extracts and ethanolic solutions.…”
Section: Matrix Effectsmentioning
confidence: 85%
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“…Matrix effect is attributed to the effect of matrix composition on the electrospray ion source, which will affect the ionization capacity of the compounds and their signal response [43]. Although the values differ between different compounds due to their different chemical nature, the sample preparation procedure in this method is adequate and values achieved for matrix effects are acceptable and considered better than similar published works, allowing low quantification limits in the order of ng L −1 [16,34,43]. Table 6 gives the matrix effects of all enantiomers as the percentage ratio between the post-spiked extracts and ethanolic solutions.…”
Section: Matrix Effectsmentioning
confidence: 85%
“…Some classes of CP, such as proton pump inhibitors [15,16], antifungals [17], Non Steroid Anti-Inflammatory Drugs (NSAID) [18][19][20][21], beta-blockers [10,12,[22][23][24][25][26][27][28][29][30][31] as well as antidepressants and their metabolites [11][12][13][28][29][30][31][32][33][34], have been reported in environmental matrices, concerning its enantiomers. Regarding antidepressants, enantioselective biodegradation of venlafaxine (VNF) was found in a French river, with racemic VNF at the output of the main WWTP discharging into the river and with EF variation along the river stretch [11].…”
Section: Introductionmentioning
confidence: 99%
“…62,66,70 Após 2006, a Cromatografia Líquida acoplada à Espectrometria de Massa (LC-MS/MS) começou a destacar-se, passando a ser a técnica de eleição nos trabalhos da área ambiental. 28,54,63,64,68,69,[71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89] Apesar de não serem tão usados, os detetores UV e de fluorescência têm sido descritos em alguns trabalhos, 48,82,90,91 como por exemplo em estudos de biodegradação enantiosseletiva desenvolvidos em laboratório, porque as amostras tendem a ser mais limpas e mais concentradas do que as amostras reais de solos, efluentes e águas superficiais. 50,51 Os métodos analíticos modernos para determinação da FE baseiam-se na formação de complexos diastereoisoméricos transitórios com os dois enantiômeros, que podem ser separados por cromatografia, devido às suas diferentes propriedades termodinâmicas.…”
Section: Seletores Quirais Para Cromatografiaunclassified
“…82 Os enantiômeros do lansoprazol e pantoprazol não foram encontrados nas amostras de águas residuais recolhidas diretamente da descarga ao longo do rio Monjolinho no Brasil. 80 Os antifúngicos quirais (econazol, cetoconazol, miconazol, tebuconazol e propiconazol) são uma classe que só foi relatada em matrizes ambientais por Huang et al, 75 tendo as concentrações dos enantiômeros de cetoconazol e miconazol diminuído entre o afluente e o efluente das ETE, mas somente o miconazol teve variação da FE, sugerindo uma ligeira enantiosseletividade na transformação. O econazol, cetoconazol e miconazol foram quantificados como racémicos em amostras de lamas, com a FE entre 0,49 e 0,51.…”
Section: Análises Quirais Em Ambiente Realunclassified
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