| 张洋洋,陈宏,张梦晗,励建荣.化学通报,2014,77(10):1005-1008. |
| 薄膜梯度扩散-分光光度法富集测量水中痕量Cr(VI) |
| Determination of Cr (VI) in water by the diffusive gradients in thin-films techniquecombined with diphenylcarbazide spectrophotometry |
| 投稿时间：2014-01-06 修订日期：2014-02-24 |
| DOI： |
| 中文关键词: Cr (VI) 薄膜梯度扩散 分光光度法 聚季铵盐 水 |
| 英文关键词:Chromium (VI), Diffusive gradients in thin-films, Spectrophotometry, poly (quaternary ammonium salt), Water |
| 基金项目:“十二五”国家科技支撑计划（No.2012BAD29B06）、辽宁省科学事业公益研究基金项目（No.2012003001）和辽宁省食品安全重点实验室暨辽宁省高校重大科技平台开放课题项目（No.LNSAKF2011038）资助 |
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| 中文摘要: |
| 建立了薄膜梯度扩散(DGT)- 二苯碳酰二肼(DPC)分光光度法(DGT-DPC法)富集测量水中痕量Cr (VI) 的分析方法。本研究先以聚季铵盐(PQAS)溶液为结合相的DGT技术 (PQAS DGT) 原位分离富集水中Cr (VI),再以DPC分光光度法测定DGT结合相中Cr (VI)的含量,最后依据DGT方程计算水中Cr (VI)的浓度。DGT-DPC法测得配制水中Cr( VI) 的回收率为95.1% ~ 101.3%,相对标准偏差(RSD)为1.60% ~3.58%；测得工业废水中Cr (VI) 的浓度为18.54 ~ 137.61mg/L,加标回收率为94.3% ~ 101.8%。当采样时间为48h,PQAS DGT对水中Cr (VI) 富集近10倍,可显著降低分析方法的检测限,实现水中痕量Cr (VI) 的定量检测。 |
| 英文摘要: |
| Cr (VI) in water was preconcentrated by the diffusive gradients in thin-films (DGT) technique with poly (quaternary ammonium salt) (PQAS) as binding phase (PQAS DGT) and measured by diphenylcarbazide (DPC) spectrophotometry.The recoveries of Cr (VI) in the synthetic solutions measured by the DGT-DPC method were 95.1% ~ 101.3% with relative standard deviation (RSD) 1.60% ~ 3.58%. The concentration of Cr (VI) in industrial wastewaters measured by the DGT-DPC method was 18.54 ~ 137.61mg/L with recoveries of 94.3% ~ 101.8%. The enrichment factor of Cr (VI) preconcentrated by PQAS DGT was 10 (deployment time 48h). Therefore, the DGT-DPC method can be used to measure trace Cr (VI) in water. |
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