|
1. Full name: Nguyen Hai Phong
2. Sex: male
3. Date of birth: 23/05/1962
4. Place of birth: Hanoi
5. Admission decision number: Decision No.291/postgraduate, November 29th, 2004 of National University of Hanoi, 3 years not centralized form of education.
6. Changes in academic process: Decision No.91/postgraduate, February 24th, 2005 of the Principal of University of Science, National University of Hanoi about additional supervisor for doctoral student and decision No.1219/postgraduate, November 19th, 2007 of the Principal of University of Science about educational extension and protecting thesis of doctoral student, the time of extension was twelve months.
7. Official thesis title: Study on the determination of cadmium in several environmental samples by adsorptive stripping voltammetry.
8. Major: Analytical chemistry.
9. Code: 62 44 29 01
10. Supervisors: Major supervisor: Prof. PhD. Tu Vong Nghi
Minor supervisor: Assoc. Prof. PhD. Nguyen Van Hop
11. Summary of the new findings of the thesis:
- 2-mecapthobenzothiazone (2-MBT) was selected as a new reagent complexing with Cd(II) for cadmium determination by SW-AdSV. Electrochemical characteristics and composition of the Cd(II)-(2-MBT) complex were studied: the number of electrons transferred in electrode process were 2; the number of ligand in the complex was 1 and stability constant of the complex (b) was 106.52.
- BiFE-bt was firstly developed for SW-AdSV for cadmium determination (with two-stage pre-concentration and suitable conditions). The method gained good linear range (0.5 ¸ 10 ppb), high sensitivity (2.082 ± 0.187 mA/ppb), good precision (RSD = 5.8% ¸ 12.0%) and low detection limit (0.19 ± 0.02 ppb).
- Suitable conditions for SPE separation and concentration of cadmium, and removal of interferents such as Cl- and Fe(III) were found out.
- Based on the results obtained, the procedures for detection of cadmium in natural samples, several pure chemicals and river sediment samples were established. Confidence of the procedures was confirmed through analysis of Certified Reference Material and spiked samples.
- The procedures were successfully applied for detection of trace/ultara-trace cadmium in natural water samples (river, lagoon, coastal, underground and mineral water samples), Huong river sediment samples in Thua Thien Hue province and several pure chemicals (Merck, Germany).
12. Practical applicability:
The first in Vietnam, the new procedures and could apply in laboratory in Vietnam for detection of ultrace cadmium in several environment samples by SW-AdSV using Nafion-coated bismuth film electrode in situ exchange for mercury electrode.
13. Further research directions:
- Continue to study SW-AdSV method using Nafion-coated bismuth film electrode in situ for detection of ultrace cadmium in different environment samples for example biologicals, pharmaceuticals and foods,…
- Study to apply SW-AdSV method using Nafion-coated bismuth film electrode in situ for detection of ultrace organic compound in different samples.
14. Thesis-related publications:
Nguyen Hai Phong, Nguye Van Hop, Nguyen Thi Ngoc Nghia, Tu Vong Nghi (2005), “Studied determination of Cd(II) by adsorptive stripping voltammetry method”, Proceeding of the second national conference on analytical sciences, pp. 244 - 248.
Nguyen Van Hop, Nguyen Hai Phong, Hoang Thai Long, Dang Van Khanh, Tu Vong Nghi (2007), “Bismuth film electrode for stripping voltammetry determination of trace lead and cadmium”, Advance in Natural Sciences 8 (2), pp. 147 - 156.
Nguyen Hai Phong, Nguyen Van Hop, Nguyen Thi Ngọc Anh, Tu Vong Nghi (2008), “Development of bismuth film electrode for adsorptive stripping voltammetric measurement of trace cadmium in the presence of 2 - mercaptobenzothiazole”, Proceedings of the International Scientific Conference on “Chemistry for Development and Intergration”, Hanoi Vietnam, pp. 549 - 557.
Nguyen Hai Phong, Nguyen Van Hop, Nguyen Thi Ngoc Anh, Tu Vong Nghi (2009), “Study on the complex of Cd(II) – 2-mercaptobenzothiazole by stripping voltammetry”, Journal of Analytical Sciences,Vol. 14 (1), pp. 45 - 51.
Nguyen Van Hop, Hoang Thai Long, Nguyen Hai Phong, Nguyen Thi Ngoc Anh (2009), “Development of mercury-free metal film electrode for stripping voltammetric measurement of trace heavy metals”, Proceedings of The International Conference on Analytical Sciences and Biotechnology, Hanoi Vietnam, pp. 93 - 102.
Nguyen Hai Phong, Đinh Van Cam, Truong Quy Tung, Nguyen Van Hop, Tu Vong Nghi (2009), “Determination of ultrace cadmium in natural water by anodic stripping voltammetry combined with solid phase extraction”, Journal of Analytical Sciences,Vol. 14 (2), pp. 22 - 28.
Nguyễn Hai Phong, Nguyen Van Hop, Tu Vong Nghi, Hoang Trong Si (2009), “Determination of cadmium in water and sediment by square ware anodic stripping voltammetry using in situ mercury electrode”, Journal of Chemistry, Vol. 47 (5A), pp. 273 -279.
Nguyen Hai Phong, Nguyen Van Hop, Tu Vong Nghi, Hoang Trong Si (2010), “Determination of cadmium in natural water and river sediment by adsorptive stripping voltammetry combined with solid phase extraction”, Journal of Analytical Sciences,Vol. 15 (1), pp. 24 - 31
|
