流动注射化学发光法对饮用水中黄绿青霉素的在线检测

利用黄绿青霉素对鲁米诺-过氧化氢-纳米氧化铜化学发光体系的抑制作用检测饮用水中可能出现的突发性污染,并对测定体系的条件进行单因素试验和响应面试验优化。结果表明:在优化的实验条件下,黄绿青霉素检测线性范围为0.005~3 mg/L,检出限为8.2×10~(-5) mg/L。对质量浓度为0.005 mg/L的黄绿青霉素进行平行测定11次,相对标准偏差为2.3%,黄绿青霉素加标回收率范围为78%~91%。该方法简便快捷、实用性强,可应用于饮用水中黄绿青霉素突发性污染在线快速检测。

On-Line Determination of Citreoviridin in Drinking Water by Flow Injection Chemiluminescence

Based on the inhibition of citreoviridin (CIT) on luminol-hydrogen peroxide-nanometer copper oxide chemiluminescence system, a new method was proposed for the identification of sudden drinking water pollution. The detection system was optimized by one-factor-at-a-time and orthogonal array design methods. Results showed that under the optimized experimental conditions, the linear range for CIT determination was 0.005–3 mg/L. The limit of detection (LOD) of CIT was 8.2 × 10-5 mg/L. The precision expressed as relative standard deviation (RSD) was 2.3% for 11 replicate determinations of 0.005 mg/L CIT, and the recoveries of spiked samples were 78%–91%. This online determination method showed the advantages of convenience and strong practicability and could have a great potential application in rapid detection of sudden citreovirid pollution in drinking water.