Determination of lead at trace levels in mussel and sea water samples using vortex assisted dispersive liquid-liquid microextraction-slotted quartz tube-flame atomic absorption spectrometry. (December 2017)

• Record Type: Journal Article
• Authors: Erarpat, Sezin; Özzeybek, Gözde; Chormey, Dotse Selali; Bakırdere, Sezgin
• Is Part Of: Chemosphere. Volume 189(2017)
• Page Start: 180
• Page End: 185
• Publication Date: 2017-12
• Subjects: Lead -- Dispersive liquid-liquid microextraction -- Slotted quartz tube -- Flame atomic absorption spectrometry -- Seawater -- Biotissues; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2017.09.072
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: 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 −1 ). The limit of detection (LOD) determined by DLLME-SQT-FAAS for seawater and mussel were 2.7 μg L −1 and 270 μg kg −1, respectively. The percent recoveries obtained for mussel and seawater samples (spiked at 20 and 50 μg L −1 ) were 95–96% and 98–110%, respectively. Graphical abstract: Highlights: A novel DLLME-SQT-FAAS method was developed for the extraction and determination of lead at trace level. The applicability and accuracy of the method was verified with spiked recovery tests. Low %RSD values indicated high precision for the extraction process and instrumental measurements. The method was applied to mussel and sea water samples.