NDLI: Supramolecular–based dispersive liquid–liquid microextraction: A novel sample preparation technique for determination of inorganic species

Content Provider	Springer Nature Link
Author	Jafarvand, Sanaz Shemirani, Farzaneh
Copyright Year	2011
Abstract	A new simple and sensitive method has been developed for the determination of trace levels of inorganic species in environmental water samples. It is based on the use of supramolecular–based dispersive liquid–liquid microextraction (SM–DLLME) prior to microsample introduction into FAAS. The ions are micro–extracted with coacervates composed of reverse micelles made from decanoic acid and dispersed in tetrahydrofuran–water mixtures. Cobalt ion was used as a model ion, and 1– (2–pyridylazo)–2–naphthol as the complexing agent. SM–DLLME results from a combination of DLLME with coacervation–based microextraction. It combines the advantages of DLLME with those of preconcentration based on coacervation and reverse micelles. Factors affecting the extraction efficiency of Co and its subsequent determination by FAAS were optimized. Under the optimized conditions and using 5.00 mL sample only, the enhancement factor is 58, the limit of detection is 4.2 μg L–1, and the relative standard deviations for 100 μg L–1 and 30 μg L–1 of Co are 2.1% and 3.8%, respectively (n = 6). The accuracy of the method was confirmed by parallel analyses using the ASTM reference method. Schematic representation SM–DLLME enrichment method (Supramolecular assemblies were hired as extraction media in dispersive liquid–liquid microextraction. This method is based on microextraction of analytes with coacervates made up of decanoic acid reverse micelles dispersed in tetrahydrofuran (THF)–water. Hazardous organic solvents as the microextraction solvent were avoided)
Starting Page	353
Ending Page	359
Page Count	7
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	173
Issue Number	3-4
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2011-02-22
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Supramolecular–based dispersive liquid–liquid microextraction (SM–DLLME) Coacervates Flame atomic absorption spectrometry Microsample introduction Reverse micelles Cobalt Nanochemistry Analytical Chemistry Characterization and Evaluation of Materials Microengineering Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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