Effective indirect enrichment and determination of nitrite ion in water and biological samples using ionic liquid-dispersive liquid–liquid microextraction combined with high-performance liquid chromatography

Separation and Preconcentration by Dispersive Liquid–Liquid Microextraction Procedure: Recent Applications

“…Waters [139] Separation and Preconcentration by DLLME 667 Water and milk samples [171] As, Sb Water and food samples [173] Separation and Preconcentration by DLLME 669 Table 2 continued Analyte Disperser solvent volume Water and biological samples [188] both detection techniques, which thus enables the application of the developed method in two ranges differing from one another by three orders of magnitude. More recently, DLLME was used by De La Calle et al [134] to preconcentrate the ion pair formed between AuCl 4 -and [CH 3 (CH 2 ) 3 ] 4 N ?…”

Microwave-assisted synthesis graphite-supported Pd nanoparticles for detection of nitrite

“…There are several techniques developed for quantitative determination of nitrite. For instance, capillary electrophoresis [6], ionic liquid dispersive liquid-liquid microextraction high-performance liquid chromatography (IL-DLLME-HPLC) [7], ion chromatography [8], chemiluminescence [9], fluorescent probe [10] and electrochemical method [11]. By comparison, electrochemical method is a kind of cheap and gleaming method because of its intrinsic sensitivity, high selectivity, fast analysis, simplicity [12] and environment-friendly [13,14].…”

Extraction of ammonia and nitrite using modified magnetite iron oxide nanoparticles before spectrophotometric determination in different water samples

“…Nevertheless, these colorimetric standard assays are not sensitive enough to be directly applied to water samples. Therefore, in order to circumvent the low sensitivity of spectrophotometric methods several sample preparation techniques such as solid-phase extraction (SPE) [2,8,14,15], cloud point extraction (CPE) [5,16,17] or liquid-phase microextraction (LPME) [18][19][20] have been developed. These techniques help in separation and preconcentration of nitrite and ammonium in aqueous matrices prior to spectrophotometric determination.…”