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composition
bed wt, 100 mg
Quality Level
packaging
pk of 108
technique(s)
solid phase extraction (SPE): suitable
volume
1 mL
matrix active group
WAX phase
application(s)
food and beverages
separation technique
ion exchange
Related Categories
1 of 4
This Item | 1.05745 | 537985 | 52664-U |
|---|---|---|---|
| technique(s) solid phase extraction (SPE): suitable | technique(s) thin layer chromatography (TLC): suitable | technique(s) - | technique(s) solid phase extraction (SPE): suitable |
| matrix active group WAX phase | matrix active group - | matrix active group - | matrix active group ammonium ion, quaternary bonding, polymerically bonded, chloride counter-ion |
| application(s) food and beverages | application(s) - | application(s) - | application(s) food and beverages |
| composition bed wt, 100 mg | composition - | composition - | composition bed wt., 500 mg |
| volume 1 mL | volume - | volume - | volume 3 mL |
General description
Sample Matrix Compatibility: Organic or aqueous Solutions
- Weak anion exchanger ideal for extracting strong basic compounds that remain charged at all pH levels
- Unlike conventional weak anion exchange SPE phases such as -NH2 (aminopropyl) that have a pKa of 9-10, a pH ≤ 7 is required to protonate or ionize the stationary phase to facilitate analyte retention. Elution is typically done by increasing the pH to 11 resulting in neutralization of the SPE phase.
- 2-(2-pyridyl)-ethyl silica gel has a pKa of ~6. Therefore, analyte elution is feasible at a pH ≥ 7. This characteristic is important for extracting analytes that are not stable (e.g. hydrolyzes) at high pHs typically required for elution when using traditional weak anion exchangers.
- Ideal for extracting acyl-coenzyme A esters from tissue.
- For more information, please see: Minkler, P.E., Kerner, J., Ingalls, S.T., Hoppel, C.L., Novel isolation procedure for short-, medium-, and long-chain acyl-coenzyme A esters from tissue, Analytical Biochemistry 376 (2008) 275–276
Signal Word
Warning
Hazard Statements
Precautionary Statements
Hazard Classifications
Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
Target Organs
Respiratory system
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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Protocols
Retention occurs through polar interaction between the sorbent and analytes. Typical sample matrices that can be employed in normal-phase SPE include hydrocarbon or fatty oils diluted in a solvent like hexane, isooctane, chlorinated solvent, THF, diethyl ether, or ethyl acetate.
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