- 作者: 林振霖
- 作者服務機構: Chemistry Department, National Taiwan College of Education, Chenghua City, Taiwan 500, R.O.C.
- 中文摘要: The reaction of 3-(4-phenyl-2-pyridyl)-5, 6-diphenyl-1, 2, 4-triazine (PPDT) and tetraphenylborate (TPB) with cobalt (II) has been studied to determine the optimum conditions for the extraction and quantitative spectrophotometric determination of this metal. The ternary complex is extracted into molten naphthalene at pH 3.6-7.4. The solid naphthalene containing the cobalt associated complex is separated by filtration and dissolved in acetonitrile. Beer's law is obeyed in the concentration range 8-140mg cobalt in 10ml of acetonitrile solution. The molar absorptivity and sensitivity are 4.2*10/sup 3/l.bcdot.mol/sup -1/.bcdot.cm/sup -1/ and 0.01408 mg/cm/sup 2/, respectively. The other factors such as pH, amounts of reagents and naphthalene, shaking and standing times, and the effect of diverse ions are studied. The method has been applied to the determination of cobalt in iron steel alloys.
- 英文摘要: --
- 中文關鍵字: Spectrophotometric determination of cobalt; PPDT; TPB; Naphthalene extraction; analysis of alloys.
- 英文關鍵字: Spectrophotometric determination of cobalt; PPDT; TPB; Naphthalene extraction; analysis of alloys.