GSMIS

Publication

Journal Publication

Title of Article

Vortex-assisted low density solvent and surfactant based dispersive liquid-liquid microextraction for sensitive spectrophotometric determination of cobalt

Date of Acceptance

8 February 2018

Journal

Title of Journal

Royal Society of Chemistry Advances

Standard

ISI

Institute of Journal

The Royal Society of Chemistry

ISBN/ISSN

2046-2069

Volume

Issue

Month

February

Year of Publication

2018

Page

7243-7251

Abstract

This study describes the development of vortex–assisted low density solvent and surfactant based dispersive liquid-liquid microextraction (VALS-DLLME) for Co(II) prior to its spectrophotometric detection. The method consisted of the complexation of Co (II) with pyrocatechol violet (PV) followed by the preconcentration of the Co (II)-PV complex using VALS-DLLME and then absorption measurement at 600 nm. The optimum conditions for complex formation were 1:3 mole ratio of Co (II) and PV at pH 7.5, while the conditions for VALS-DLLME were 300 µL 1-dodecanol as extraction solvent, and 300 µL acetonitrile as dispersive solvent under vortex for 20 s with the addition of cationic surfactant (0.02 mmol L-1 CTAB). Under the optimum conditions, good linearity was in the range of 0.1-10 mg L-1, the enrichment factor (EF) was 13.5 and low limit of detection (LOD) was 0.04 mg L-1. The method was applied for the analysis of Co (II) in water, green leaf vegetable and vitamin B12 samples. The proposed method provided good recoveries in the range of 86-104%, which were comparable to those obtained from flame atomic absorption spectrophotometry.

Keyword

Dispersive liquid-liquid microextraction, Surfactant, Co (II), Vegetable, Vitamin B12, Water, Pyrocatechol violet, Spectrophotometry

Author

575020222-7	Mr. PATIWAT CHAIYAMATE [Main Author]
	Science Master's Degree

Reviewing Status

มีผู้ประเมินอิสระ

Status

ตีพิมพ์แล้ว

Level of Publication

นานาชาติ

citation

false

Part of thesis

true

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