Sensitive determination of bioaccessible mercury in complex matrix samples by combined photochemical vapor generation and solid phase microextraction coupled with microwave induced plasma optical emission spectrometry

Is MIP-OES a suitable alternative to ICP-OES for trace element analysis?

“…Photochemical vapor generation (PVG) has been used in combination with atomic spectrometry, including to enhance the sensitivity for Hg and Se in MIP-OES. 38,91 With PVG, the analyte is converted to volatile species in the presence of a photochemical agent through a photo-reduction reaction using UV irradiation. Bioaccessible fractions of Hg were monitored during their incubation in a simulated body uid in the presence of selenium nanoparticles (SeNPs), which were examined as a potential Hg detoxifying agent.…”

“…All concentrations determined in DORM-4 were in agreement with certified values. Borowska and Jankowski 38 determined bioaccessible mercury by combining photochemical vapor generation, solid phase microextraction and MIP-OES. Using two CRMs (sediment, ERM CC580, for total mercury; and tuna fish, ERM CE464, for methylmercury) to evaluate the method's accuracy, recoveries of 101% for total mercury, and 87.3% for methylmercury, and precision values of 3.8% and 12.5%, respectively, were obtained.…”

“…Bioaccessible fractions of Hg were monitored during their incubation in a simulated body fluid in the presence of selenium nanoparticles (SeNPs), which were examined as a potential Hg detoxifying agent. 38 Thus, with the aim of increasing analyte EF, and improving sensitivity and LOD, Hg vapor was generated by PVG from both inorganic Hg and methylmercury in 5% v v −1 formic acid. An integrated approach, which comprises gas–liquid separation (GLS) under stopped-flow mode and preconcentration by solid phase microextraction (SPME) coupled with thermal desorption (TD), was employed.…”

Versatile Photoelectrochemical Biosensing for Hg2+ and Aflatoxin B1 Based on Enhanced Photocurrent of AgInS2 Quantum Dot–DNA Nanowires Sensitizing NPC–ZnO Nanopolyhedra

“…In addition, many agricultural products may be contaminated by aflatoxin B1 (AFB1) due to the unrestricted growth of fungi, which can bind to DNA of living organisms and increase the risk of human cancer complications. , Therefore, it is essential to develop sensitive and reliable analytical methods for the timely detection of the trace Hg 2+ and AFB1 content. The current methods for detecting Hg 2+ and AFB1 mainly include atomic absorption/emission spectrometry, redox potential determination, chromatography, and enzyme-linked immunosorbent assay . Despite their high accuracy and selectivity, these methods have high costs, long sample pretreatment time, and high equipment precision requirements …”

MoS2–Covalent Organic Framework Composite as a Bifunctional Supporter for the Determination of Trace Nickel by Photochemical Vapor Generation–Microplasma Optical Emission Spectrometry

“…The ideal sampling approach is to convert analytes into volatile species by chemical/photochemical/electrochemical vapor generation (VG) or electrothermal vaporization (ETV) before analysis. ,− Among them, photochemical vapor generation (PVG) has gradually attracted much attention due to its simple reaction, easy miniaturization, safe operation, and environmental friendliness. , However, to better meet the requirements of practical application, the efficiency of PVG needs to be further improved for highly sensitive detection. Furthermore, it should be noted that the coexisting ions in the complex sample matrix will consume reductive radicals or act as sensitizers, thereby inhibiting or promoting PVG, resulting in inaccurate quantification. , To solve the above problems, a large number of sensitizers are employed to improve the efficiency of PVG, such as semiconductor catalysts or transition-metal ions. − Meanwhile, extraction − and dilution approaches are adopted to reduce the interference of coexisting ions. Although the combination of the individual matrix interference removal and subsequent PVG enhancement approaches can meet the requirements for the detection of trace analytes in complex matrices, it would not only make the operation process cumbersome but also inevitably increase the risk of contamination and loss of analytes.…”