A comparison of flow injection methods for sulfide determination based on phenothiazine dyes produced from diverse aromatic amines

Santos, Josué Carinhanha Caldas; Santos, Eduardo Batista Guimarães Nunes; Korn, Mauro

doi:10.1016/j.microc.2008.02.007

Cited by 12 publications

(1 citation statement)

References 17 publications

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“…Several methods have been reported by adopting the same reaction using different analytical techniques like flow injection analysis, solid-phase extraction, and solid-phase reflectometry [ 7 , 8 ]. In addition to the spectrophotometry, various other techniques like atomic florescence spectroscopy (AFS) [ 9 ], atomic absorption spectroscopy (AAS) [ 10 ], flow injection analysis (FIA) [ 11 , 12 ], and inductively coupled plasma atomic emission spectroscopy (ICPAES) [ 13 ] have been successfully utilized for the quantification of sulfide. These techniques require expensive instrumentation and skilled technical personnel to operate the systems.…”

Section: Introductionmentioning

confidence: 99%

Micelle Mediated Trace Level Sulfide Quantification through Cloud Point Extraction

Devaramani

Malingappa

2012

The Scientific World Journal

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A simple cloud point extraction protocol has been proposed for the quantification of sulfide at trace level. The method is based on the reduction of iron (III) to iron (II) by the sulfide and the subsequent complexation of metal ion with nitroso-R salt in alkaline medium. The resulting green-colored complex was extracted through cloud point formation using cationic surfactant, that is, cetylpyridinium chloride, and the obtained surfactant phase was homogenized by ethanol before its absorbance measurement at 710 nm. The reaction variables like metal ion, ligand, surfactant concentration, and medium pH on the cloud point extraction of the metal-ligand complex have been optimized. The interference effect of the common anions and cations was studied. The proposed method has been successfully applied to quantify the trace level sulfide in the leachate samples of the landfill and water samples from bore wells and ponds. The validity of the proposed method has been studied by spiking the samples with known quantities of sulfide as well as comparing with the results obtained by the standard method.

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