Electrochemical studies on speciation of tin-amino acid complexes
Issued Date
2024
Copyright Date
1991
Resource Type
Language
eng
File Type
application/pdf
No. of Pages/File Size
xi, 148 leaves : ill.
Access Rights
open access
Rights
ผลงานนี้เป็นลิขสิทธิ์ของมหาวิทยาลัยมหิดล ขอสงวนไว้สำหรับเพื่อการศึกษาเท่านั้น ต้องอ้างอิงแหล่งที่มา ห้ามดัดแปลงเนื้อหา และห้ามนำไปใช้เพื่อการค้า
Rights Holder(s)
Mahidol University
Bibliographic Citation
Thesis (M.Sc. (Physical Chemistry))--Mahidol University, 1991
Suggested Citation
Pravitra Chandranupap Electrochemical studies on speciation of tin-amino acid complexes. Thesis (M.Sc. (Physical Chemistry))--Mahidol University, 1991. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/99854
Title
Electrochemical studies on speciation of tin-amino acid complexes
Alternative Title(s)
การศึกษาการกระจายชนิดของสารประกอบเชิงซ้อนของดีบุกกับกรดอะมิโนบางชนิดโดยวิธีทางเคมีไฟฟ้า
Author(s)
Advisor(s)
Abstract
The equilibria of tin (2+) complexes with some amino acids namely, glycine, dl-alanine, l-phenylalanine and l-cysteine were obtained as a representative for the studies of tin (2+)-biomolecules interaction. Tin (2+)-amino acid systems in the medium of 1.0 M KC1 at 25 degree C were studied by means of electrochemical techniques such as potentiometric pH titration and polarography. In potentiometric pH titration, the studies were performed in the tin (2+) to amino acid concentration ratio (M:L) range from 1:50 to 1:1. Low initial concentration of tin (2+) was used in the titration to avoid precipitation in the solution systems. The most reasonable potentiometric pH data were evaluated with the generalized non-linear curve fitting program, MINIQ. The technique and computer program were also confirmed by determining the amino acid protonation constants. The orders of magnitude of the formation constants which obtained from the best fitted potentiometric data in M:L ratio ranges from 1:50 to 1:10 and same complex type, were: l-cysteine > dl-alanine > glycine > l-phenylalanine Polarographic studies were made in the same condition of potentiometric pH titration in order to compare the result of the two different electrochemical techniques. These gave results consistent with potentiometric pH technique in the existence of complex species at the different pH ranges.
Description
Physical Chemistry (Mahidol University 1991)
Degree Name
Master of Science
Degree Level
Master's degree
Degree Department
Faculty of Science
Degree Discipline
Physical Chemistry
Degree Grantor(s)
Mahidol University
