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首页> 外文期刊>Journal of the Brazilian Chemical Society >Determination of benzo[b]naphtho[2,3-d]thiophene (BNT) in sediments using selective heavy atom induced room-temperature phosphorimetry
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Determination of benzo[b]naphtho[2,3-d]thiophene (BNT) in sediments using selective heavy atom induced room-temperature phosphorimetry

机译：选择性重原子诱导室温荧光法测定沉积物中的苯并[b]萘[2,3-d]噻吩（BNT）

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摘要

Room-temperature phosphorescence characteristics of benzo[b] naphtho[2,3-d] thiophene (BNT) were studied under several experimental conditions. Best phosphorescence was obtained using Tl(I) and Pb(II) as heavy atom enhancers, both in the presence of SDS as surface modifier. Under these two conditions of maximum phosphorescence, working curves with three orders of magnitude were achieved and absolute limits of detection and quantification of respectively 0.6 and 2.0 ng in the presence of Tl(I) and 3.2 and 10.7 ng in the presence of Pb(II). The RTP potential for selective trace-level determination was tested using a sediment sample spiked with BNT and using Pb(II) as the selective heavy atom enhancer. The recovery of BNT was very satisfactory (101.5 +/- 7.4%, n = 6) indicating that the method can be properly applied for the analysis of complex samples. The interference potential from other polycyclic aromatic hidrocarbons (pyrene, chrysene, carbazole, 7,9-dimethylbenz[c] acridine and dibenzothiophene) was evaluated and the method was considered selective in the presence of these substances.
机译：在几种实验条件下研究了苯并[b]萘[2,3-d]噻吩（BNT）的室温磷光特性。在SDS作为表面改性剂的情况下，使用Tl（I）和Pb（II）作为重原子增强剂可获得最佳的磷光。在这两个最大磷光条件下，获得了三个数量级的工作曲线，在Tl（I）存在下检测和定量的绝对极限分别为0.6和2.0 ng，在Pb（II）存在下检测和定量的绝对极限分别为3.2和10.7 ng ）。使用掺有BNT的沉积物样品以及使用Pb（II）作为选择性重原子增强剂，测试了用于选择性痕量水平测定的RTP电位。 BNT的回收率非常令人满意（101.5 +/- 7.4％，n = 6），表明该方法可以正确地用于复杂样品的分析。评估了其他多环芳烃（py，，咔唑，7,9-二甲基苯并[c] cr啶和二苯并噻吩）的潜在干扰，认为该方法在存在这些物质的情况下具有选择性。

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