Simultaneous effect of pH, deposition time, deposition potential and step potential on the stripping peak current of lead and cadmium by response surface methodology
Các tập tin
Ngày
2019
Tác giả
Nguyen, Thi Lieu
Cao, Van Hoang
Nguyen, Thi Dieu Cam
Nguyen, Thi Thanh Binh
Pham, Quoc Trung
Le, Truong Giang
Tên Tạp chí
Tạp chí ISSN
Nhan đề tập
Nhà xuất bản
Nguyen Tat Thanh University
Giấy phép
Tóm tắt
In this paper, a simple voltammetric method has been reported for the lead, and cadmium determination using platinum nanoflowers modified glassy carbon electrode (PtNFs/GCE). The effects of pH, deposition time, deposition potential, step potential were investigated on the stripping peak current of lead, and cadmium based on response surface methodology (RSM). The results of RSM analysis and analysis of variance (ANOVA) have shown that the experimental data could be well described by quadratic regression equations with determination coefficients (R2) of 0.935, and 0.972 for the stripping peak current of lead, and cadmium, respectively. Results of the statistical analysis showed that the fit of the model was good in all cases. The maximum stripping peak current of the lead, and cadmium of 5.54µA, and 2.81µA, respectively were obtained at the optimum levels of process variables (pH (4.72), deposition potential (-1.14V), deposition time (120s), step potential (7mV)). Testing the model to analyze lead, and cadmium on the PtNFs/GC electrode using differential pulse anodic stripping voltammetry (DPASV) and obtained with the stripping peak current of the lead, and cadmium of 5.43µA, and 2.75 µA, respectively.
Mô tả
7 pages.
Từ khóa
Pb 2+ , Cd2+ , PtNFs/GCE , Response surface methodology , DPASV
Trích dẫn
Nguyen Tat Thanh University. (2019). Journal of Science and Technology - NTTU, No 06. ISSN 2615-9015.