A Preconcentration Procedure for Determination of Ultra-Trace Mercury (II) in Environmental Samples Employing Continuous-Flow Cold Vapor Atomic Absorption Spectrometry

Analytical strategies of sample preparation for the determination of mercury in food matrices — A review

“…An enrichment procedure employing Fe 3 O 4 magnetic nanoparticles functionalized with dithizone was investigated for extraction and determination of ultra-trace amounts of mercury in table salt, green tea, vegetables, toothpaste, and water samples using CV AAS [115]. A preconcentration procedure for determination of amount trace of mercury in sea and river fish samples was proposed using dispersive liquid-liquid micro-extraction [116].…”

Determination of Hg(II) ions in sea food samples after extraction and preconcentration by novel Fe3O4@SiO2@polythiophene magnetic nanocomposite

“…The vertical line on the plot shows statistically significant effects. The bars that extend beyond the line correspond to the effects that are statistically significant at the 95 % confidence level (StatGraphics Plus 5.1 for Windows, online manuals 2001; Ebrahimzadeh et al 2012;Adlnasab et al 2014;Amani et al 2011;Taghizadeh et al 2014). Furthermore, the positive or negative sign (corresponding to a colored or colorless response) can enhance or reduce the extraction efficiency, respectively, while increasing from the lowest to the highest level set for that specific factor.…”

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

“…54 The sorbent was prepared by reuxing for 24 h an excess of DT added to chloro-functionalised Fe 3 O 4 nanoparticles dispersed in toluene. Magnetic Fe 3 O 4 nanoparticles were functionalised with dithizone (DT) as a new sorbent for the preconcentration of Hg in various foods (green tea, table salt, vegetables), water and toothpaste.…”