• 沒有找到結果。

Determination of Xanthii constituents by high-performance liquid chromatography and capillary electrophoresis

N/A
N/A
Protected

Academic year: 2021

Share "Determination of Xanthii constituents by high-performance liquid chromatography and capillary electrophoresis"

Copied!
1
0
0

加載中.... (立即查看全文)

全文

(1)

Determination of Xanthii constituents by

high-performance liquid chromatography and capillary

electrophoresis

徐鳳麟

Sheu SJ;Hsu FL;Tai HM;Sheu MJ;Huang MH

Abstract

A high-performance liquid chromatographic method and a capillary electrophoretic method for the determination of potassium 3-O-caffeoyl quinate and 7-hydroxymethyl-8, 8-dimethyl-4,8-dihydro-benzo[1,4]thiazine-3,5-dione of Xanthium Strumarium L. were developed. In capillary zone electrophoresis, a buffer solution containing sodium borate and sodium acetate was found to be the most suitable approach to determine the contents of these marker substances within 50 minutes. In high-performance liquid chromatography, a buffer solution containing phosphate and acetonitrile was applied to analyze these marker substances within 60 minutes. The effect of buffers on the determination and validation of these two methods was discussed.

參考文獻

相關文件

canceling the dt’s) enables us to find the slope dy/dx of the tangent to a parametric curve without having to eliminate... This can be found by replacing y by dy/dx in

 Promote project learning, mathematical modeling, and problem-based learning to strengthen the ability to integrate and apply knowledge and skills, and make. calculated

Now, nearly all of the current flows through wire S since it has a much lower resistance than the light bulb. The light bulb does not glow because the current flowing through it

Wang, Solving pseudomonotone variational inequalities and pseudocon- vex optimization problems using the projection neural network, IEEE Transactions on Neural Networks 17

Using this formalism we derive an exact differential equation for the partition function of two-dimensional gravity as a function of the string coupling constant that governs the

Define instead the imaginary.. potential, magnetic field, lattice…) Dirac-BdG Hamiltonian:. with small, and matrix

For problems 1 to 9 find the general solution and/or the particular solution that satisfy the given initial conditions:. For problems 11 to 14 find the order of the ODE and

• To consider the purpose of the task-based approach and the inductive approach in the learning and teaching of grammar at the secondary level.. • To take part in demonstrations