Table 4.
Comparison of the proposed I-V method with different previously reported analytical methods for the detection of Cr3+.
| Methods | Material | Sensitivity | *LDR | #LOD | @LOQ | Ref. |
|---|---|---|---|---|---|---|
| Amperometric | Tyrosinase biosensor | – | 2.0 × 10−4 M | 500.0 nM | – | [48] |
| Capillary electrophoresis | 1,2-Cyclohexanediaminetetraacetic acid (CDTA) | – | 0.0 M–0.0019 M | 961.6 nM | – | [40] |
| Capillary electrophoresis | Hexamolybdochromate | – | 5 × 10−6–1 × 10−5 M | 2000 nM | – | [41] |
| Chemiluminescence | Ethylene diamine tetra acetate (EDTA) | – | 0.0–1 × 10−6 M | 0.5 nM | – | [42] |
| Cyclic voltammetry&erometry | Gold nanoparticle-decorated titania nanotube arrays | 6.91 µAµM−1 | 0.10 µM–105 µM | 0.03 µM | – | [45] |
| Electrothermal atomic absorption spectrometric | Nano TiO2 | – | 1 × 10−3–0.5 M | 0.11 nM | – | [27] |
| Thin-layer X-ray fluorescence spectrometry | Solid-phase hydrous ferric hydroxide (HFO) | – | 0.0–1.0 µM | 16.9 nM | – | [36] |
| High-performance liquid chromatography with diode-array detection | Ammonium pyrrolidinedithiocarbamate (APDC) | – | 190 nM–0.76 mM | 76,900–134,000 nM | – | [28] |
| Inductively Coupled Plasma Atomic-emission Spectrometry | Micro-column of activated alumina | – | 0.0–1.9 × 10−5 M | 26.0 nM | – | [26] |
| Electrochemical I-V method | ATNA/Nafion/GCE | 0.0071202 µAµM−1cm−2 | 1.0 nM–0.01 M | 0.013 nM | 0.04 nM | This work |
*LDR = linear dynamic ranger; #LOD = limit of detection; @LOQ = limit of quantification