S. number Analyte Analytical instrument used for the detection Method Limit of detection (LOD)# Linearity range Analyzed samples Interference study Supporting media Reference 1 Hg(II) DP-ASV Electrochemical 4.99 × 10−8 M — Ambient water, tap, and wastewaters Palladium-natural phosphate-carbon paste electrode enhances the selectivity for Hg2+ Natural phosphate electrodes [103 ] 2 Hg(II) SW-ASV Electrochemical 0.04 × 10−6 M 0.2–10.0 μ M Foodstuffs Simultaneously both Cd2+ and Hg2+ are determined and 1,000-fold for K+ , Na+ , Li+ , 2+ , Mg2+ , Pb2+ , Zn2+ , Cr3+ , Fe2+ , Co2+ , and Al3+ did not interfere Carbon paste electrode [104 ] 3 Hg(II) Differential pulse voltammeter Electrochemical 4.48 × 10−10 M 0.2–10 μ g L−1 Spiked fish and plant samples Cu(II), Mg(II), As(III), and Cr(II) were possible interferers 4,4′-Bipyridine-silver polymer [105 ] 4 Hg(II) Cyclic voltammeter Electrochemical 0.8 × 10−14 M 10−14 –10−7 M — Cu2+ , Pb2+ , Ni2+ , Zn2+ , Cr3+ , Co3+ , As5+ , Fe2+ , and Fe3+ did not interfere Gold atomic cluster-chitosan [106 ] 5 Hg(II) Voltammeter Biosensor 3.93 × 10−12 M 0.005–0.034 mM Water samples The working potential controlled to minimize the interference of other metal ions in test medium PANI and PANI-co-PDTDA polymer films [107 ] 6 Hg(II) ASV Electrochemical 4.98 × 10−9 M 4–160 ppb Aquatic solutions — Glassy carbon electrode [108 ] 7 Hg(II) SW-ASV Electrochemical 9.2 × 10−5 M 0.1–150.0 nM Soil, gasoline, fish, tap, and wastewaters 400-fold mass ratio of Cu2+ , Mn2+ , Zn2+ , Cr3+ , Cr6+ , Fe3+ , Fe2+ , Ni2+ , and Co2+ did not interfere in the simultaneous determination of Cd2+ , Pb2+ , and Hg2+ Triphenyl phosphine [109 ] 8 Hg(II) Potentiometer Electrochemical 9.77 × 10−6 M (PME)1 −7 M (CGE)1 1.0 × 10−1 –5.0 × 10−6 M (PME) −1 –5.0 × 10−7 M (CGE) Water samples Ag+ has small interference in the determination of Hg2+ 1,3-Alternate thiacalix [110 ] 9 Hg(II) Potentiometer Electrochemical 1.0 × 10−8 M 5.0 × 10−8 –1.0 × 10−2 M — The selectivity coefficient of the other ions is ranging from 2.9 to 4.9 PVC membrane [111 ] 10 Hg(II) DPSV Electrochemical 0.05 × 10−12 M 1–500 nM Water samples Pb2+ , Th3+ , Cu2+ , Cd2+ , Ni2+ , and Al3+ did not interfere Gold nanoparticles [112 ] 11 Hg(II) SW-ASV Ultrasonic extraction — — Indoor dust samples — Gold nanoparticles [113 ] 12 Hg(II) Cyclic voltammeter Electrochemical 1.9 × 10−9 M 40–170 μ g L−1 Wastewaters — Biotinyl Somatostatin-14 peptide [114 ] 13 Hg(II) Potentiometer Electrochemical 3 × 10−6 M 5 × 10−6 –1 × 10−2 M Contaminated water Na+ , K+ , Mg2+ , Ca2+ , Zn2+ , Cu2+ , Cr3+ , Fe3+ , and Pb2+ did not interfere in the determination of Hg2+ Dithizone and di-n-butyl phthalate [115 ] 14 Hg(II) DP-ASV Electrochemical 0.483 × 10−6 M 300–700 ng mL−1 — No interference of Cd, Ni, Zn, and Cu in 50-, 25-, 100-, and 5-fold in excess, respectively Nanocellulosic fibers [116 ] 15 Hg(II) — Electrochemical 0.5 × 10−9 M 1.0 nM–1.0 μ M Zn2+ , Mg2+ , Ca2+ , Pb2+ , Cd2+ , Mn2+ , Cu2+ , Ni2+ , and Fe3+ did not interfere G-quadruplex–hemin (G4–hemin) [117 ]
