Fast and sensitive UHPLC methods with fluorescence and tandem mass spectrometry detection for the determination of tetracycline antibiotics in surface waters

Técnicas cromatográficas e o desafio na determinação de ­compostos presentes em matrizes complexas: Relato de um caso prático do produto natural piperlongumina

“…Com a presença dessas pontes, a maioria dos grupos silanóis livres está protegida [15] , conferindo elevada estabilidade química ao longo de quase toda a faixa de pH (1 a 12), diminuição de interações secundárias indesejáveis com esses grupamentos [10] e maior estabilidade mecânica, por meio das ligações silício-carbono, que garante resistência a altas pressões [11] .…”

Simultaneous determination of selected veterinary antibiotics in Nile tilapia (Orechromis niloticus) and water samples by HPLC/UV and LC-MS/MS

“…These drugs were determined separately using various techniques and in combination with other drugs in sh and water samples. These methods include: (a) high performance liquid chromatography (HPLC) with several detection techniques, [5][6][7][8][9][10][11][12][13][14][15][16][17][18] liquid chromatography-tandem mass spectrometry (LC-MS/MS), [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] capillary electrophoresis (CE) 26,27 and spectrophotometry. 28 On the other hand the simultaneous determination of TMP, SDI, STZ, CTC, DOX, FF, NAL and FLU in sh (Nile tilapia) and water samples was not reported.…”

Trace determination of tetracyclines in water samples by capillary zone electrophoresis combining off-line and on-line sample preconcentration

“…Chromatographic methods have been usually applied for the determination of TCs in environmental waters, using mainly UV/Vis , fluorescence , and MS detection . CE can be an interesting alternative to HPLC, taking into account its advantages, such as high analysis speed, high separation efficiency, and low reagent consumption .…”

“…In order to overcome this problem, two approaches could be selected, such as on‐line and off‐line sample preconcentration techniques. Off‐line preconcentration, including sample cleanup, has usually been carried out by SPE for the analysis of TCs in water samples . Other authors have proposed different alternatives such as molecular imprinted SPE or dispersive liquid–liquid microextraction .…”