Research Article
Facile Synthesis of Copper-Coated-Reduced-Graphene-Oxide and Its Application as a Highly Sensitive Electrochemical Sensor for Hydroquinone
Table 2
Determination results for HQ in local tap and reservoir water.
| | Samples | Serial number | Added (μM) | Found (nM) | Recovery (%) | RSD (%) | Found (nM) | Recovery (%) | RSD (%) | | Cu/rGO/GCE sensor | HPLC-UV |
| | Tap water | 1 | 10.0 | 9.8 | 98.0 | 3.2 | 9.9 | 99.0 | 4.1 | | 2 | 20.0 | 19.7 | 98.5 | 2.3 | 19.8 | 97.5 | 3.2 | | 3 | 30.0 | 30.5 | 101.7 | 4.1 | 30.2 | 100.7 | 3.6 |
| | Reservoir water | 1 | 10.0 | 10.2 | 102.0 | 4.2 | 9.7 | 97.0 | 2.8 | | 2 | 20.0 | 19.4 | 97.0 | 3.9 | 19.6 | 98.0 | 3.5 | | 3 | 30.0 | 29.6 | 98.7 | 2.5 | 29.5 | 98.3 | 2.7 |
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