Solid–liquid extraction and cation-exchange solid-phase extraction using a mixed-mode polymeric sorbent of Datura and related alkaloids

2006 ◽  
Vol 1107 (1-2) ◽  
pp. 9-18 ◽  
Author(s):  
Tomasz Mroczek ◽  
Kazimierz Głowniak ◽  
Joanna Kowalska
Keyword(s):  
Solid Phase Extraction ◽  
Cation Exchange ◽  
Mixed Mode ◽  
Solid Phase ◽  
Liquid Extraction ◽  
Phase Extraction ◽  
Polymeric Sorbent ◽  
Solid Liquid Extraction ◽  
Solid Liquid

scholarly journals Sulfonic Acid-Functionalized SBA-15 as Strong Cation-Exchange Sorbent for Solid-Phase Extraction of Atropine and Scopolamine in Gluten-Free Grains and Flours

Foods ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1854
Author(s):  
Lorena González-Gómez ◽  
Judith Gañán ◽  
Sonia Morante-Zarcero ◽  
Damián Pérez-Quintanilla ◽  
Isabel Sierra
Keyword(s):  
Solid Phase Extraction ◽  
Cation Exchange ◽  
Solid Phase ◽  
Tropane Alkaloids ◽  
Sample Treatment ◽  
Phase Extraction ◽  
Gluten Free ◽  
Strong Cation Exchange ◽  
Sorghum Flour ◽  
Solid Liquid

A novel method was developed and applied to the determination of the most representative tropane alkaloids (TAs), atropine and scopolamine, in gluten-free (GF) grains and flours by HPLC-MS/MS. Accordingly a suitable sample treatment procedure based on solid-liquid extraction (SLE) and followed by strong cation-exchange solid-phase extraction (SCX-SPE) was optimized. SBA-15 mesostructured silica functionalized with sulfonic acids was evaluated as sorbent. The proposed method was fully validated in sorghum flour showing good accuracy with recoveries in the range of 93–105%, good linearity (R2 > 0.999) and adequate precision (RSD < 20%). Low method quantification limits (MQL) were obtained (1.5 and 2.4 µg/kg for atropine and scopolamine, respectively) and no matrix effect was observed thanks to the extraction and clean-up protocol applied. The method was applied to 15 types of GF samples of pseudocereals (buckwheat, quinoa and amaranth), cereals (teff, corn and blue corn, sorghum and millet) and legumes (red and green lentil, chickpea and pea). Atropine was found above the MQL in eight of them, with values between 7 and 78 µg/kg, while scopolamine was only found in teff flour, its concentration being 28 µg/kg. The method developed is an interesting tool for determining TAs in a variety of samples of GF grains and flours.

scholarly journals Mixed-Mode Solid-Phase Extraction and Cleanup Procedures for the Liquid Chromatographic Determination of Thiabendazole and Carbendazim in Fruit Juices

2001 ◽  
Vol 84 (2) ◽  
pp. 556-562 ◽  
Author(s):  
Michael S Young ◽  
Dorothy J Phillips ◽  
Pamela C Iraneta ◽  
Jim Krol
Keyword(s):  
Solid Phase Extraction ◽  
Cation Exchange ◽  
Mixed Mode ◽  
Solid Phase ◽  
Chromatographic Determination ◽  
Reversed Phase ◽  
Phase Extraction ◽  
Grape Juices ◽  
Liquid Chromatographic

Abstract Solid-phase extraction (SPE) procedures were developed for rapid cleanup and determination of thiabendazole and carbendazim in orange, apple, and grape juices. Samples were prepared by using an SPE cartridge containing a mixed-mode sorbent with both reversed-phase and strong cation-exchange chemistries. Analysis was by liquid chromatography with photodiode-array UV detection. Orange juice was analyzed by mixed-mode cation-exchange extraction with reversed-phase cleanup; the other juices were analyzed by reversed-phase extraction with cation-exchange cleanup. Recoveries &gt;80% for carbendazim and &gt;90% for thiabendazole. Quantitation limits were 20 μg/L for both analytes.

Solid-phase extraction of tobacco-specific N-nitrosamines with a mixed-mode hydrophobic/cation-exchange sorbent

2018 ◽  
Vol 1 (4) ◽  
pp. 288-295 ◽  
Author(s):  
Yan-Bo Luo ◽  
Yong-Qiang Pang ◽  
Xing-Yi Jiang ◽  
Xiang-Yu Li ◽  
Hong-Fei Zhang ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Cation Exchange ◽  
Mixed Mode ◽  
Solid Phase ◽  
Phase Extraction
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