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Merck
CN

21195-U

Supelco

GC Stationary Phase

phase Polyethyleneimine, bottle of 50 g

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About This Item

UNSPSC Code:
23151817
NACRES:
SB.54

Key Documents

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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. 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. Polyethyleneimine (PEI) is suitable for protein separation. It binds insistently to negative charged stationary phase. It is a pseudostationary phase which is also a cationic polymer.
Synthesized specifically to be purer, of narrow molecular weight range, and without trace catalysts or impurities for use as a GC stationary phase.

Pictograms

Exclamation markEnvironment
GHS07,GHS09

Signal Word

Warning

Hazard Statements

H302,H317,H319,H411

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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Certificates of Analysis (COA)

Lot/Batch Number

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  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. What are the specifications for Product 21195-U, Polyethyleneimine?

    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.

  4. What is the molecular weight of Polyethyleneimine, Product 21195-U?

    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).

  5. Do you know the pKa of polyethyleneimine?

    The nitrogens in polyethyleneimine (PEI) are mainly in tertiary amines. PEI has a pKa of approximately 5.9.

  6. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  7. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  8. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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
David B. Troy, Paul Beringer
Remington: The Science and Practice of Pharmacy, 605-605 (2006)
James P. Lodge, Jr.
Methods of Air Sampling and Analysis, 98-98 (1988)

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