การสกัดระดับจุลภาคแบบกระจายสำหรับการตรวจวัดตะกั่วและดีบุกในอาหารกระป๋องประเภทน้ำ
Food processing and preservation can cause unintended contamination in food. This project developed a dispersive liquid-liquid microextraction (DLLME) method for simultaneous extraction of Pb2+ and Sn2+ for the detection by inductively coupled plasma – optical emission spectroscopy (ICP-OES) in aque...
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| 格式: | Senior Project |
| 語言: | Thai |
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จุฬาลงกรณ์มหาวิทยาลัย
2017
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| 主題: | |
| 在線閱讀: | https://digiverse.chula.ac.th/Info/item/dc:10054 |
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| 機構: | Chulalongkorn University |
| 語言: | Thai |
| 總結: | Food processing and preservation can cause unintended contamination in food. This project developed a dispersive liquid-liquid microextraction (DLLME) method for simultaneous extraction of Pb2+ and Sn2+ for the detection by inductively coupled plasma – optical emission spectroscopy (ICP-OES) in aqueous based canned foods. The Codex Committee Food Additives and Contaminants (CCFAC) and World Health Organization (WHO) set maximum concentration limits for Pb²⁺ and Sn²⁺ at 1 and 250 ppm, respectively. Simultaneous extraction conditions are: 8.0 % (w/w) sodium diethyldithiocarbamate (DDTC) as a chelating agent, 500 μL of chloroform as extraction solvent, 800 μL of methanol as disperser solvent, 3 minutes of centrifuge and 45 °C of extraction temperature. The optimized method provides 43.3 and 4.05 folds enrichment for Pb²⁺ and Sn²⁺, respectively. |
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