Development of Hydrazine Sensor Based on Modified Glassy Carbon Electrode Hemas Arif Rahman1, Wulan Tri Wahyuni1,2, Budi Riza Putra3*
1 Analytical Chemistry Division, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Kampus IPB Dramaga, Bogor 16680, Indonesia
2 Tropical Biopharmaca Research Center, Institute of Research and Community Empowerment, IPB University, Bogor 16680, Indonesia
3 Research Center for Metallurgy, National Research and Innovation Agency (BRIN) Republic of Indonesia, Jakarta, Indonesia
Hydrazine is a toxic compound which has neurotoxin, mutagenic, carcinogenic, and hepatotoxic properties. In this work, a glassy carbon electrode or GCE has been modified with the composite of electrochemically reduced graphene oxide or ErGO and poly 3,4 ethylenedioxythiophene polystyrenesulfonate or PEDOTPSS for the purpose of hydrazine detection. The proposed sensor exhibits a well electrochemical and analytical performance investigated with the optimum parameters for the measurement using cyclic voltammetry or CV, differential pulse voltammetry or DPV, and square wave voltammetry or SWV techniques. In particular DPV and SWV techniques displayed a linear relationship in the concentration range of 100 to 200 uM of hydrazine based on GCE modified ErGO/PEDOT:PSS. Furthermore, both techniques were used to obtain the value the detection limit (LoD) and quantitation limit (LoQ) for hydrazine detection as 10 uM and 50 uM for DPV and 15 uM and 60 uM for SWV. In addition, this proposed hydrazine sensor displayed a good selectivity due to its recovery range in the range 95 to 120 percent with an acceptable reproducibility and stability indicated by % RSD value of less than 5 percent. In conclusion, this proposed sensor for hydrazine detection based on GCE modified ErGO/PEDOT:PSS shows a potency to be applied in real analysis.
Keywords: electrochemically reduced graphene oxide, hydrazine, PEDOT:PSS, voltammetry, water analysis
