水中三鹵甲烷含量測定的方法研究

制藥工程論文編號:ZY117    論文字數:11231,頁數:27

目   錄

中文摘要 I
英文摘要 II
目錄 III
1. 緒論 1
 1.1 水污染概況 1
 1.2 國內外對揮發性有機物研究狀況 1 
 1.3 本實驗任務 2
2. 儀器與試劑 3
 2.1 儀器  3
 2.2 試劑 3
3. 實驗部分 4
 3.1 方法裝置與過程   4
 3.2 操作步驟 4
 3.2.1 純水的制備 4
 3.2.2 配制標準系列 4
 3.2.3 進樣操作 5
 3.2.4 吹掃捕集條件的確定 5
 3.2.5 方法的選擇性 6
 3.2.6 方法檢出限與測定限的確定 6
 3.2.7 工作曲線制作 6
 3.2.8 方法精密度的測定 7
 3.2.9 方法準確度的測定 7
 3.2.10 水樣采集和保存 7
 3.2.11 加標回收率的測定 7
 3.2.12 實際樣品的測定 7
4. 結果分析與討論 8
 4.1 吹掃捕集條件的確定   8
 4.2 方法的選擇性   9
 4.3 方法檢出限與定量范圍  10
 4.4 標準曲線的制作  11
 4.5 方法的精密度   14
 4.6 方法的準確度   15
 4.7 加標回收率的測定   16
 4.8 實際樣品的測定   18
5. 結論 20

致謝 21
參考文獻 22

摘 要:采用吹掃-捕集/氣相色譜/電子捕獲檢測聯用技術（P&T-GC/ECD）快速分析生活飲用水中多組分的微量三鹵甲烷。對吹掃時間、解吸溫度、解吸時間等吹掃-捕集條件進行優化，對分析方法的選擇性、精密度、準確度、加標回收率進行驗證，并對實際水樣實測分析。本方法操作簡單、省時，具有較高的靈敏度、準確度、精密度和較廣的分析范圍，方法的線性范圍為10.0-100.0μg/L,相關系數在0.9987-0.9992之間，一溴二氯甲烷、二溴一氯甲烷、三溴甲烷三種物質的檢出限分別為1.759μg/L、1.138μg/L 、2.400μg/L。相對標準偏差均小于５％,加標回收率在97%-12%之間。結果表明本方法適用于飲用水中三鹵甲烷的分析。
關鍵詞: 吹掃—捕集；氣相色譜；電子捕獲檢測器；三鹵甲烷；水

Abstract: The method of purge and trap in combination with gas chromatographic/electron capture detection was established for the rapid determination of multi-component trace trihalomethane in drinking water simultaneously. The experimental conditions of P&T, such as Purge time, desorption temperature, desorption time were optimized. In addition , the selectivity, precision, accuracy and recovery of this analysis method were validated. The method is simple, time-saving, with high sensitivity, accuracy, precision and a wide linear range. The linear ranges were between 10.0-100.0μg/L, the correlation coefficients were between the 0.9987-0.9992. The detection limits of bromodichloromethane, dibromochloromethane, bromoform were 1.759μg/L, 1.138μg/L, 2.400μg/L respectively. The relative standard deviations(RSD) were less than 5%. The average recoveries of the method were between 97%-112%. The results showed that the method was suitable for trace analysis of THMs in drinking water.
Key word: Purge and Trap; Gas chromatography; ECD; THMs(Trihalomethane); Water