“…[12][13][14][15][16] As a consequence, there is a growing interest in developing techniques for detecting S 2À ions, which has to be rapid, selective, and ultrasensitive. The qualitative as well as quantitative determination of S 2À can be done in a variety of ways, such as titrimetry, [17] flow-injection analysis, [18] inductively coupled plasma atomic emission spectroscopy, [19] hydride generation atomic fluorescence spectrometry, [20] electrochemical methods, [21] ion chromatography, [22] HPLC, [23] chemiluminescence, [24] colorimetry, [25] molecular emission cavity analysis, [26] and fluorimetry, [27] etc. These approaches, however, have several drawbacks, such as a long detection time, a high detection cost, and difficult modification processes.…”