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題 名 | 中藥材微量有機氯農藥之超臨界流體檢驗方法之研究=Supercritical Fluid Analysis of Trace Organochlorine Pesticides in Chinese Herbs |
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作 者 | 凌永健; | 書刊名 | 中醫藥年報 |
卷 期 | 17:3 1999.05[民88.05] |
頁 次 | 頁261-306 |
分類號 | 414.32 |
關鍵詞 | 中藥材; 有機氯農藥; 超臨界流體萃取; 農藥殘留分析; Chinese herbs; Organochlorine pesticides; Supercritical fluid extraction; Pesticide residues analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 中藥材成份複雜且來源不一,產地之生長環境不易控制,須加 以嚴格檢測及管理,以確保消費者之健康,和增進國產中藥材成品 之外銷競爭力。長效性有機氯農藥不易分解,具有生物累積性,其 農藥殘留問題更凸顯。現今法規並無完整規範藥材中殘留農藥安全 容許量,因此建立中藥材微量農藥殘留檢測方法應是速不容緩之研 究目標之一。 本研究發展超臨界二氧化碳流體萃取--線上淨化--附電子 捕捉偵測器氣相層析儀偵測方法以分析中藥材中16種殘留微量有機 氯農藥。探討修飾劑種類、萃取壓力、萃取溫度、靜態萃取時間、 動態萃取時間、吸附劑種類及數量等變因作為最適化萃取條件之探 討,結果以純二氧化碳流體,萃取壓力250atm、萃取溫度50℃、靜 態萃取時間5min、動態萃最時間20min、填充2g 矽酸鎂之線上淨化 方式為最適化萃取條件。方法偵測極限介於1∼6ppb,平均再現性介 於5∼34%,平均回收率介於78∼121%。本方法具有簡易、快速、 溶劑及樣品用量少之優點,用來分析市售20種單方生藥材及11種複 方中藥材中有機氯農藥殘留量。偵測到之有有機氯農藥多為蟲必死系 列,其中又以紅參之殘留問題最為嚴重,高達1.2 ppm,日本容許 之殘留量之6倍。建議未來抽檢市售中藥材中殘留有機氯農藥應以高 單價、人工栽培之中藥材為優先。 |
英文摘要 | Chinese herbs (CHs) posses complex composition and come from various sources. The control of the culturing environment is difficult. In order to protect the health of the consumers and to strengthen the exporting competency, it is necessary to analyze and manage the CHs. Persistent organochlorine pesticides (OCPs) are difficult to decompose and tend to accumulate in living species. The problems from OCPs are more significant. Current regulations do not have comprehensive tolerance levels of pesticide residues in CHs, The development of analytical methods for pesticide residues in CHs is highly demanding. This project developed supercritical CO Fluid extraction--online cleanup--gas chromatograph electron capture detection method to analyze 16 residues OCPs in CHs. Factor, such as modifiers, extraction temperature, extraction pressure, static extraction time, dynamic extraction time, and the amounts of absorents were investigated to search for the optimal extraction conditions. The results indicates that CO fluid, 250 atm extraction pressure, 50℃ extraction temperature, 5 min static extraction temperature, 20 min dynamic extraction time, and 2 g florisil online cleanup is the optimal extraction condition. The method detection limits vary from 1 to 6 ppb. Mean reproducibilities between 5% and 34% and nean recoveries between 78 and 121% were obtained. The method is simple, rapid and requires only small amount of samples and solvents. The method was used to analyze CHs sold in Taiwan, which include 20 herb pulverization and 11 pulverization extract(i.e,m scientific Chinese Medicines). Most of the detected OCPs are belong to the BHC class. The Ginseng radix has the most serious OCPs residue problem. It contains 1.2 ppm of total BHC, which is 6 times the tolerance levels regulated by the Japanese govenment. The analysis of high--unit price, human--cultured CHs shoild be listed as the first priority should future screening of OCP residues in CHs is carried out. |
本系統中英文摘要資訊取自各篇刊載內容。