Stripping analysis of Pb(II), Cd(II), Hg(II) and Cu(II) based on irradiated attapulgite/Ionic liquid composites

Hierarchical MgFe-layered double hydroxide microsphere/graphene composite for simultaneous electrochemical determination of trace Pb(II) and Cd(II)

“…In spite of high sensitivity and accuracy of these methods, they are not appropriate for on-site measurements on account of cumbersome and sophisticated apparatus, complicated pretreatment procedures and tedious analysis time. By contrast, electrochemical technique has received increasing attention in the analytical field due to its fascinating features such as simple handling, rapid response, low limit of detection (LOD), superior sensitivity and favourable selectivity [22][23][24][25][26][27][28][29][30][31].…”

Novel Sensor Based on Poly (1,2‐Diaminoanthraquinone) for Individual and Simultaneous Anodic Stripping Voltammetry of Cd2+, Pb2+, Cu2+ and Hg2+

“…Hg 2+ firstly occupies the active sites of electrode material, then Cd 2+ , Pb 2+ and Cu 2+ were electrodeposited on the electrode. The formation of Cd (0), Pb (0) and Cu (0) metal film resulted in the significant improvement of Hg 2+ sensitivity (as mentioned previously), while in case of Pb 2+ and Cu 2+ , this could be assigned to the formation of Cu−Hg and Pb−Hg intermetallic compound during the deposition process . However, in case of Cd 2+ , the LOD value was increased due to the competitive deposition of the metals on the surface of the electrode.…”

“…For Hg 2+ , the anodic peak current in mixture solution was greater than that in a single one (Figures and d), Hg 2+ firstly occupies the active sites of electrode material, then Cd 2+ , Pb 2+ and Cu 2+ were electrodeposited on the electrode. The formation of Cd (0), Pb (0) and Cu (0) metal film resulted in the significant improvement of Hg 2+ sensitivity . It is also observed that HMs peak currents were increased, with positive peak potentials shift for Cd 2+ , Pb 2+ , Cu 2+ , and negative shift for Hg 2+ in single solutions, which could be attributed to the IR drop since the oxidation of metals became less reversible .…”

“…Contamination of water with heavy metals (HMs) such as copper, cadmium, mercury and lead is a serious environmental problem due to its toxicity. It affects ecological environments and human health as it may cause damage to bones, liver or kidney and also it affects the central nervous system . Determination of HMs by spectrophotometric analysis devices such as flame atomic absorption spectrometry (FAAS) or inductively coupled plasma combined either with optical emission spectroscopy (ICP‐OES) or with mass spectrometry (ICP‐MS) is very expensive and time consuming given limitations in the field.…”

Study on Cd2+ Determination Using Bud‐like Poly‐L‐Tyrosine/Bi Composite Film Modified Glassy Carbon Electrode Combined with Eliminating of Cu2+ Interference by Electrodeposition

“…Cu 2 + ions are widely present in the environment and have a great influence on electrochemical analysis of Cd 2 + [13,22]. Although the simultaneous determination of Cu 2 + and Cd 2 + ions has been reported in some literatures, the response sensitivity of Cd 2 + ions is significantly reduced due to the interference of Cu 2 + ions [23][24][25][26]. In order to eliminate the interference of Cu 2 + ions on the analysis of Cd 2 + ions, some researchers took the measure of adding a certain concentration of potassium ferrocyanide into the test solution [27][28][29].…”