Magnetic solid phase extraction coupled with inductively coupled plasma mass spectrometry for the speciation of mercury in environmental water and human hair samples

Methods and recent advances in speciation analysis of mercury chemical species in environmental samples: a review

“…Microwave digestion made the total Hg determination possible by CV-AAS after reducing with 0.4% (m/v) NaBH 4 , so that the difference is MeHg. As mentioned earlier, recent reports by Trujillo et al [65] and Ma et al [66] also shown the use of adsorbents for speciation analysis of Hg 2+ and MeHg chemical species in water samples.…”

“…ICP-MS, [3,41,65] UV, [11,37,80] and DAD [14] are the commonly used detectors in CE. In non-chromatographic techniques, AFS, [40,69,70,82] volatile species generation flame less/flame atomization AFS (VSG-FL/FA-AFS), [81] ET-AAS, [5,17] CV-AAS, [68] ICP-MS, [66] ICP-OES, [82] and UV-vis [83][84][85][86] , MeHg, EtHg, and PhHg is almost comparable to the conventional methods. However, difficulty to discriminate the OrgHg species and its less applicability in complex matrix, the method become invalid at high cations concentration (like sea water samples), and yield false results in the presence of protein molecules (like in urine samples) are the main weaknesses of this technique.…”

“…For effective pre-concentration purpose, in the case of Hg analysis, the adsorbents could be pretreated with functional groups having high affinity towards Hg chemical species. [64] SPE with adsorbents like commercial C18 column,[8] Amberlyst 36, [9] polymer-supported ionic liquid, [39] thiol modified magnetic silica sorbent, [42] 1,5-bis(2-pyridyl) methylene thiocarbohydrazide functionalized mesoporous silica, [65] and γ-mercaptopropyltrimethoxysilane modified Fe 3 O 4 @SiO 2 magnetic nanoparticles [66] have been investigated to retain various Hg species in environmental samples.…”

“…In addition to these qualities, additional separation stage was not required for the speciation analysis which drastically decreases the time of analysis and solvent consumption. Ma et al [66] reported the effective adsorption of Hg 2+ and MeHg with γ-mercaptopropyltrimethoxysilane modified Fe 3 O 4 @SiO 2 magnetic nanoparticles which can be eluted using 1.5 mol/L HCl containing 0.01% (m/v) thiourea for MeHg and 1.5 mol/L HCl containing 3% (m/v) thiourea for total Hg followed by ICP-MS determination and then the amount of Hg 2+ was obtained from the difference of total Hg and MeHg. SPME is another tiny SPE in which limited amount of the adsorbent and necessary solvents are consumed.…”

Mercury in archeological hair samples from Xiongnu burials (Noin‐Ula, Mongolia): SR XRF and CXRM analysis

“…There are few studies on the forms of mercury in hair, mainly the hair of modern people being investigated. Typically, the levels of mercury content in hair are less than 1–30 μg/g .…”