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首页> 外文会议>Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009 >Determination of Trace Copper in Natural Waters Using Flow Injection Chemiluminescence System with On-Line Solid-Phase Extraction
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Determination of Trace Copper in Natural Waters Using Flow Injection Chemiluminescence System with On-Line Solid-Phase Extraction

机译：在线固相萃取流动注射化学发光系统测定天然水中的痕量铜

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摘要

A novel flow injection chemiluminescence (FI-CL) system combined with on-line solid phase extraction (SPE) has been developed for the determination of trace copper in natural waters. The chemiluminescence (CL) is obtained by oxidation of novel rhodanine derivative by potassium permanganate in hydrochloric acid in the presence of copper. C18-modified silica gel was packed into the glass tube to serve as SPE device. Extraction and preconcentration of the analytes were carried out using on-line SPE system and the selectivity of CL detection was improved. Under the optimum conditions, the calibration graph obtained by injecting copper solutions into the carrier stream is linear with CL intensity over the range of 1.0times10-3-2.5 mugldrmL-1 and the detection limit was 0.02 ngldrmL-1 (s=3). The method was successfully applied to the determination of copper in natural waters. Compared with most of the other methods reported, the rapid and simple procedure proposed in the text offers higher sensitivity, wider linear range, and better stability.
机译：已开发出一种新颖的流动注射化学发光（FI-CL）系统与在线固相萃取（SPE）相结合的方法，用于测定天然水中的痕量铜。化学发光（CL）是在铜的存在下，通过高锰酸钾在盐酸中氧化新型若丹宁衍生物而获得的。将C 18 改性硅胶填充到玻璃管中以用作SPE装置。使用在线SPE系统进行分析物的提取和预浓缩，从而提高了CL检测的选择性。在最佳条件下，将铜溶液注入载流所获得的校正图在1.0×10 -3 -2.5 mugldrmL -1 和1.0×10 -3 -2.5检出限为0.02 ngldrmL -1 （s / n = 3）。该方法已成功应用于天然水中铜的测定。与报告的大多数其他方法相比，本文提出的快速简便的方法具有更高的灵敏度，更宽的线性范围和更好的稳定性。

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