Yusof Nor Azah, Kadir Wan Abdul Rahman Wan Abdul
Chemistry Department, Faculty of Science and Environmental Studies, Universiti Putra Malaysia, 43400 Serdang, Selangor D.E., Malaysia.
Spectrochim Acta A Mol Biomol Spectrosc. 2009 Feb;72(1):32-5. doi: 10.1016/j.saa.2008.07.019. Epub 2008 Jul 25.
Optical test strip based on the use of Br-PADAP as a sensitive reagent immobilised into sol-gel thin film for detection of Hg(II) in aqueous solution had been thoroughly carried out. It has a square-sensing zone (1.0 cm x 1.0 cm) containing the sensitive reagent necessary to produce response to trace level of mercury. This method offer sensitivity and simplicity in detecting Hg(II) as no prior treatment or extraction is required. A linear response was attained in the Hg(II) concentration in the range of 0.5-2.5 ppm with calculated limit of detection of 6.63 ppb. This method also showed a reproducible result with relative standard deviation (R.S.D.) of 2.15% and response time of approximately 5 min. Interference studies showed that Al(III), Co(II) and Ni(II) significantly interfered during the determination. The developed sensor has been validated against Atomic Absorption Spectroscopy method and proven comparable.
基于使用溴邻苯三酚红（Br-PADAP）作为固定在溶胶-凝胶薄膜中的灵敏试剂来检测水溶液中汞（II）的光学测试条已得到充分研究。它有一个方形传感区（1.0厘米×1.0厘米），包含对痕量汞产生响应所需的灵敏试剂。该方法在检测汞（II）时具有灵敏度和简便性，因为无需进行预处理或萃取。在汞（II）浓度为0.5 - 2.5 ppm范围内获得了线性响应，计算出的检测限为6.63 ppb。该方法还显示出可重现的结果，相对标准偏差（R.S.D.）为2.15%，响应时间约为5分钟。干扰研究表明，铝（III）、钴（II）和镍（II）在测定过程中会产生显著干扰。所开发的传感器已通过与原子吸收光谱法进行验证，并证明具有可比性。
