Tang Bo, Yue Taixing, Wu Junsen, Dong Yuming, Ding Yi, Wang Hongjian
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China.
Talanta. 2004 Nov 15;64(4):955-60. doi: 10.1016/j.talanta.2004.04.016.
A novel fluorescent reagent o-vanillin-8-aminoquinoline(OVAQ) was synthesized, and its infrared spectrum, elemental analysis and acid-base dissociation constants were obtained. The fluorescent reaction of this reagent with Cr(III) was studied. In acetonitrile-water (1:1, (v/v)) medium of pH 6.00, Cr(III) could react with fluorescent reagent OVAQ (lambda(ex/em)=280/314nm) to form a 1:1 non-fluorescent complex. The linear range of the spectrofluorimetric method proposed was from 8.2 to 130mugl(-1), and the detection limit was 2.5mugl(-1). The interferences of 25 foreign ions were also studied. This method could be easily performed and was successfully applied to the determination of Cr(III) and total chromium in domestic and industrial waste water samples.
合成了一种新型荧光试剂邻香草醛 - 8 - 氨基喹啉（OVAQ），并获得了其红外光谱、元素分析和酸碱解离常数。研究了该试剂与Cr(III)的荧光反应。在pH 6.00的乙腈 - 水（1:1，(v/v)）介质中，Cr(III)能与荧光试剂OVAQ（激发/发射波长λ(ex/em)=280/314nm）反应形成1:1的非荧光络合物。所提出的荧光分光光度法的线性范围为8.2至130μg l⁻¹，检测限为2.5μg l⁻¹。还研究了25种外来离子的干扰情况。该方法操作简便，已成功应用于生活污水和工业废水样品中Cr(III)和总铬的测定。
