Dispersive Liquid-Liquid Microextraction-Solidified Floating Organic Drop Combined with Spectrophotometry for the Speciation and Determination of Ultratrace Amounts of Selenium

Recent Microextraction Techniques for Determination and Chemical Speciation of Selenium

“…The same group published another, similar, method for speciation and determination of selenium (Table 5) using DLLME-SFOD prior to spectrophotometry detection [36]. The derivatization of selenite was achieved using 3, 3-diaminobenzidine (DAB) prior to its extraction by 1-undecanol mixed with ethanol as disperser solvent.…”

“…A new method for determination of selenite in river water was developed by Kocot and others [36] (Table 6) using dispersive liquid-liquid microextraction (DLLME) with dried spot technique combined with energy dispersive X-ray fluorescence spectrometry (EDXFS). A sample volume of 5.0 ml was used, and diethyldithiocarbamate (DDTC) was used as the complexing agent.…”

Solvent Extraction, Spectrophotometric Determination of Selenium (Iv) at Microgram Level Using O-Methylphenyl Thiourea as a Sensitive Reagent: Analysis of Pharmaceuticals, Synthetic Mixtures and Real Samples

“…Quantitative separation allied with spectrophotometric determination of selenium(IV) has been reported, based on various techniques like solvent extraction [14,15] micro extraction [16] , cloud point extraction [17][18][19] , flotation [20] and solid phase extraction. [21,22] Spectrophotometric determination of selenium (IV) has been studied recently by catalytic kinetic determination [23][24][25][26][27][28][29][30] and flow injection kinetic determination.…”