Wang Nan, Sun Jianchao, Fan Hai, Ai Shiyun
College of Chemistry and Material Science, Shandong Agricultural University, Taian 271018, Shandong, PR China.
College of Chemistry and Material Science, Shandong Agricultural University, Taian 271018, Shandong, PR China.
Talanta. 2016;148:301-7. doi: 10.1016/j.talanta.2015.11.007. Epub 2015 Nov 4.
In this work, a novel approach for facile and rapid detection of heavy metal ions using anion-intercalated layered double hydroxides (LDHs) modified test strips is demonstrated. By intercalating Fe(CN)6(4-) or S(2-) anions into the interlayers of LDHs on the filter paper, various heavy metal ions can be easily detected based on the color change before and after reaction between the anions and the heavy metal ions. Upon the dropping of heavy metal ions solutions to the test strips, the colors of the test strips changed instantly, which can be easily observed by naked eyes. With the decrease of the concentration, the color depth changed obviously. The lowest detection concentration can be up to 1×10(-6) mol L(-1). Due to the easily intercalation of anions into the interlayer of the LDHs on test trips, this procedure provides a general method for the construction of LDHs modified test strips for detection of heavy metal ions. The stability of the prepared test strips is investigated. Furthermore, all the results were highly reproducible. The test strips may have potential applications in environmental monitoring fields.
在这项工作中，展示了一种使用阴离子插层层状双氢氧化物（LDHs）修饰的试纸简便快速检测重金属离子的新方法。通过将Fe(CN)6(4-)或S(2-)阴离子插入滤纸上LDHs的层间，基于阴离子与重金属离子反应前后的颜色变化，可以轻松检测各种重金属离子。将重金属离子溶液滴加到试纸上时，试纸颜色立即改变，肉眼可轻松观察到。随着浓度降低，颜色深度明显变化。最低检测浓度可达1×10(-6) mol L(-1)。由于阴离子易于插入试纸条上LDHs的层间，该方法为构建用于检测重金属离子的LDHs修饰试纸提供了一种通用方法。研究了制备的试纸的稳定性。此外，所有结果具有高度可重复性。这些试纸可能在环境监测领域有潜在应用。
