Department of Chemistry, Payame Noor University, 19395-4697 Tehran, Islamic Republic of Iran.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Apr;89:216-21. doi: 10.1016/j.saa.2011.12.055. Epub 2012 Jan 9.
A new mercury optical sensor was designed with indigo carmine (IC) as a dye indicator. The water-soluble indicator was lipophilized in the form of an ion-pair with N-cetyl pyridinium chloride (CPC) and dissolved in methanol (70 °C), then immobilized on a triacetylcellulose membrane. This optode exhibits a linear range of 24.0-468.0 μM of the Hg (II) ion concentration with detection limit of 7.2 μM at 669.5 nm. Response time was within 8-10 min, depending on the Hg (II) ion concentration. The sensor could readily be regenerated with a hydrochloric acid solution (0.01 M) in a reversible manner and its response was reproducible (RSD=3.2%). The method was applied to the determination of mercury content of a variety of samples which gave satisfactory results.
设计了一种新型的汞光学传感器，以靛胭脂（IC）作为染料指示剂。水溶性指示剂以 N-十六烷基氯化吡啶（CPC）形成离子对的形式脂化，并溶解在甲醇（70°C）中，然后固定在三醋酸纤维素膜上。该光极对 Hg（II）离子浓度在 24.0-468.0 μM 范围内呈线性，检测限为 669.5nm 时为 7.2 μM。响应时间取决于 Hg（II）离子浓度，在 8-10 分钟内。该传感器可以用盐酸溶液（0.01 M）以可逆的方式进行再生，其响应具有重现性（RSD=3.2%）。该方法已应用于各种样品中汞含量的测定，结果令人满意。
