Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Rd, Sheffield, S3 7RH, UK; College of Science, Aljouf University, Airport ST, Sakaka, 72388, Saudi Arabia.
Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Rd, Sheffield, S3 7RH, UK; Department of Physics, University of Taif, Taif-Al-Haweiah, 21974, Saudi Arabia.
Anal Chim Acta. 2020 Apr 8;1105:1-10. doi: 10.1016/j.aca.2020.01.070. Epub 2020 Jan 31.
Morin dye is known as a cheap and readily available selective 'off → on' fluorescent sensitiser when immobilised in a phase transfer membrane for the detection of Al ions. Here, a morin derivative, NaMSA, which readily dissolves in water with good long-term stability is used in conjunction with a fibre optic transducer with lock-in detection to detect Al in drinking water below the potability limit. The combination of a water soluble dye and the fibre optic transducer require neither membrane preparation nor a fluorescence spectrometer yet still display a high figure-of- merit. The known ability to recover morin-based Al cation sensors selectively by exposure to fluoride (F) anions is further developed enabling a complementary sensing of either fluoride anions, or aluminium cations, using the same dye with a sub-micromolar limit-of-detection for both ions. The sensor performance parameters compare favourably to prior reports on both aqueous aluminium and fluoride ion sensing.
变色酸是一种廉价且易于获得的选择性“关闭→开启”荧光增敏剂，当将其固定在相转移膜中用于检测 Al 离子时。在这里，使用了一种易于在水中溶解且具有良好长期稳定性的变色酸衍生物 NaMSA，与光纤传感器和锁定检测相结合，可在饮用水中检测到低于饮用水标准的 Al。水溶性染料和光纤传感器的组合既不需要膜制备也不需要荧光光谱仪，但仍显示出很高的品质因数。通过暴露于氟化物（F）阴离子来选择性回收基于变色酸的 Al 阳离子传感器的已知能力得到了进一步发展，这使得使用相同的染料对氟化物阴离子或铝阳离子进行互补检测成为可能，两种离子的检测限均低至亚微米。该传感器的性能参数与先前关于水相中的铝离子和氟离子传感的报告相比具有优势。
