Modified Lanthanum–Zeolite for Sensitive Electrochemical Detection of Heavy Metal Ions

“…They claimed that this electrode is capable of trace heavy metals quantication present in drinking water. 74 Thiocyanate from industrial effluents with high concentration causes considerable toxicity to aquatics. Its detection is therefore the most signicant research objective.…”

Section: Electrochemical Detectionmentioning

confidence: 99%

Recent advances in the synthesis and applications of mordenite zeolite – review

et al. 2021

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“…When Cd enters the body, it is transported into the bloodstream via erythrocytes and albumin, and is then accumulated in the kidneys [ 16 ], lungs [ 17 ], and gut [ 18 ]. The amount of heavy metals that humans can bear daily is very limited [ 19 ], and the presence of these heavy metals in the human body is a severe problem even at low or trace concentration levels [ 20 ]. Exceeding this threshold can destroy the kidneys, bones, heart and blood vessels of the human body, causing adverse reactions, such as carcinogenesis [ 17 ], coronary heart disease [ 21 ], cardiovascular disease [ 22 ], mutagenesis and teratogenesis [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Establishment of an Indirect Competitive Enzyme-Linked Immunosorbent Method for the Detection of Heavy Metal Cadmium in Food Packaging Materials

Chen

et al. 2021

Foods

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Heavy metals in food packaging materials have been indicated to release into the environment at slow rates. Heavy metal contamination, especially that of cadmium (Cd), is widely acknowledged as a global environment threat that leads to continuous growing pollution levels in the environment. Traditionally, the detection of the concentration of Cd relies on expensive precision instruments, such as inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma-atomic emission spectrometry (ICP-AES). In this study, an indirect competitive enzyme-linked immunosorbent assay (ic-ELISA) based on a specific monoclonal antibody was proposed to rapidly detect Cd. The half-inhibitory concentration and detection sensitivity of the anti-cadmium monoclonal antibody of the ic-ELISA were 5.53 ng mL−1 and 0.35 ng mL−1, respectively. The anti-Cd monoclonal antibody possessed high specificity while diagnosising other heavy metal ions, including Al (III), Ca (II), Cu (II), Fe (III), Hg (II), Mg (II), Mn (II), Pb (II), Zn (II), Cr (III) and Ni (II). The average recovery rates of Cd ranged from 89.03–95.81% in the spiked samples of packing materials, with intra- and inter-board variation coefficients of 7.20% and 6.74%, respectively. The ic-ELISA for Cd detection was applied on 72 food packaging samples that consisted of three material categories—ceramic, glass and paper. Comparison of the detection results with ICP-AES verified the accuracy of the ic-ELISA. The correlation coefficient between the ic-ELISA and the ICP-AES methods was 0.9634, demonstrating that the proposed ic-ELISA approach could be a useful and effective tool for the rapid detection of Cd in food packaging materials.

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