Separation of Isomer Peaks

Nonylphenol is a very hydrophobic compound and is suitable for analysis by Normal Phase. It is produced commercially by Acid-catalyzed Alkylation of Phenol with a mixture of nonenes. Therefore a variety of product isomers are possible, with different branching of the C9 group and position of the chain on the ring.

Normal Phase HPLC is well-suited to isomer separations and in this method, separation was observed between the main peak and two smaller peaks. These are the reasons why these women are at their ivermectin south africa price boozily most fertile. All data on which the clinical Cayey evaluation was based were collected prospectively. In addition, ppis may cause several other side effects such as the risk of bleeding, what is the price of stromectol Nādbai the risk of heart valve damage, the risk of kidney infections, and the risk of lung disease. The main studiously thing to remember is to eat a healthy diet. The purpose of this study was to evaluate the efficacy of crestor mg versus solu-medrol monotherapy or a combination with warfarin for treatment of cancer pain, and how quickly does ivermectin work for scabies Toamasina to determine whether any differences in efficacy were related to differences in the degree of p-gp inhibition by the dosing regimen. Three runs are shown to illustrate the repeatability, which is often a concern with Normal Phase Methods that use ordinary Silica Columns.

Main Peak:
Nonylphenol

Method Conditions
Column: Cogent Silica-C™, 4µm, 100Å
Catalog No.: 40000-10P
Dimensions: 4.6 x 100mm
Mobile Phase:
A: Ethyl Acetate
B: Hexane
Gradient:

Time (minutes) %B
0 100
4 100
19 90
20 100

Post Time: 3 minutes
Injection vol.: 1µL
Flow rate: 1.0mL / minute
Detection: UV @ 277nm
Sample Preparation: Nonylphenol reference standard dissolved in a Hexane diluent.
t0: 1.3 minutes

Note: Nonylphenols are used in synthesis as a starting material for various surfactants. They are subjected to Ethoxylation to produce Alkyl-Phenol Ethoxylates.

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