Yıldız Technical University, Department of Chemistry, 34349 İstanbul, Turkey.
Yıldız Technical University, Department of Chemistry, 34349 İstanbul, Turkey.
Chemosphere. 2017 Dec;189:180-185. doi: 10.1016/j.chemosphere.2017.09.072. Epub 2017 Sep 17.
In this study, dispersive liquid-liquid microextraction (DLLME) and slotted quartz tube (SQT) were coupled to flame atomic absorption spectrometry (FAAS) to increase the sensitivity of lead. Conditions such as the formation of the lead-dithizone complex, efficiency of the DLLME method and the output of the SQT were systematically optimized to improve the detection limit for the analyte. The conventional FAAS system was improved upon by about 3.0 times with SQT-FAAS, 32 times with DLLME-FAAS and 142 times with DLLME-SQT-FAAS. The method was applicable over a wide linear range (10-500 μg L). The limit of detection (LOD) determined by DLLME-SQT-FAAS for seawater and mussel were 2.7 μg L and 270 μg kg, respectively. The percent recoveries obtained for mussel and seawater samples (spiked at 20 and 50 μg L) were 95-96% and 98-110%, respectively.
在本研究中，采用分散液液微萃取（DLLME）和开槽石英管（SQT）与火焰原子吸收光谱法（FAAS）相结合，以提高铅的灵敏度。系统优化了形成铅-双硫腙配合物、DLLME 方法效率和 SQT 输出等条件，以提高分析物的检测限。与传统的 FAAS 系统相比，SQT-FAAS 提高了约 3.0 倍，DLLME-FAAS 提高了 32 倍，DLLME-SQT-FAAS 提高了 142 倍。该方法在较宽的线性范围内（10-500μg L）适用。通过 DLLME-SQT-FAAS 测定海水和贻贝的检出限（LOD）分别为 2.7μg L 和 270μg kg。贻贝和海水样品（分别在 20 和 50μg L 水平下加标）的回收率为 95-96%和 98-110%。
Zotero 插件