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21195-U
GC Stationary Phase
phase Polyethyleneimine, bottle of 50 g
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About This Item
UNSPSC Code:
23151817
NACRES:
SB.54
Recommended Products
packaging
bottle of 50 g
parameter
0-175 °C temp. range
technique(s)
gas chromatography (GC): suitable
matrix active group
Polyethyleneimine phase
solubility
acetone: soluble
column type
packed GC
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General description
GC methods are divided into two classes depending on the nature of stationary phases; gas-solid chromatography (GSC) and gas-liquid chromatography (GLC). GSC has solid adsorptive material and solute particles are removed from mobile phase by electrostatic forces. GLC has a thin layer of liquid coated or bonded on the surface of an inert particle or on the walls of the column where solute particles are retained in the liquid phase based on their partition coefficients.[1] The primary necessity of a stationary phase is to provide sample separation sustaining phase integrity over a reasonable period of time. It should be stable for the chemical and thermal changes. Selectivity, peak symmetry, analysis time, degree of separation, peak tailing are few parameters to consider for choosing a stationary phase.[2] Polyethyleneimine (PEI) is suitable for protein separation. It binds insistently to negative charged stationary phase.[3] It is a pseudostationary phase which is also a cationic polymer.[4]
Synthesized specifically to be purer, of narrow molecular weight range, and without trace catalysts or impurities for use as a GC stationary phase.
Signal Word
Warning
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Irrit. 2 - Skin Sens. 1
Storage Class Code
10 - Combustible liquids
WGK
WGK 2
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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Customers Also Viewed
Barry L. Karger
High Resolution Separation and Analysis of Biological Macromolecules: Fundamentals (1996)
B Maichel et al.
Journal of chromatography. A, 853(1-2), 121-129 (1999-09-16)
The effect of methanol and acetonitrile, respectively, on the separation of neutral compounds (benzyl alcohol, phenols) is investigated in electrokinetic chromatographic (EKC) systems consisting of polyethyleneimine (PEI) as charged, polymeric, replaceable pseudostationary phase. The separation systems consist of a buffer
James P. Lodge, Jr.
Methods of Air Sampling and Analysis, 98-98 (1988)
David B. Troy, Paul Beringer
Remington: The Science and Practice of Pharmacy, 605-605 (2006)
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What is the Department of Transportation shipping information for this product?
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What is the molecular weight of Polyethyleneimine, Product 21195-U?
1 answer-
The molecular weight distribution of the polyethyleneimine: average Mn ~60,000 by gel permeation chromatography (GPC), average Mw ~750,000 by light scattering (ELSD; evaporative light scattering detection).
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Do you know the pKa of polyethyleneimine?
1 answer-
The nitrogens in polyethyleneimine (PEI) are mainly in tertiary amines. PEI has a pKa of approximately 5.9.
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What are the specifications for Product 21195-U, Polyethyleneimine?
1 answer-
The polyethyleneimine, Supelco 21195-U, is made from Aldrich 181978. Supelco purifies the PEI to use as a GC phase; it is commonly solvated with acetone for use in the manufacturing of packings for gas chromatography columns. It exists as a thick, clear, colorless, odorless liquid at room temperature.
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