Documents
55237-U
Supel™ QuE
Citrate/Sodium Bicarbonate Tube, pk of 50
Recommended Products
Quality Level
composition
magnesium sulfate, 4 g
sodium bicarbonate, 5 g (Cat. No. S6014)
sodium chloride, 1 g (Cat No. S7653)
sodium citrate dibasic sesquihydrate, 0.5 g (Cat. No. 71635)
sodium citrate tribasic dihydrate, 1 g (Cat. No. S4641)
packaging
pk of 50
technique(s)
QuEChERS: suitable
centrifuge tube volume
15 mL
application(s)
food and beverages
separation technique
ion exchange
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Related Categories
1 of 4
This Item | 55227-U | 55295-U | 55294-U |
|---|---|---|---|
| packaging pk of 50 | packaging pk of 50 | packaging pk of 50 | packaging pk of 50 |
| technique(s) QuEChERS: suitable | technique(s) QuEChERS: suitable | technique(s) QuEChERS: suitable | technique(s) QuEChERS: suitable |
| centrifuge tube volume 15 mL | centrifuge tube volume 15 mL | centrifuge tube volume 15 mL | centrifuge tube volume 15 mL |
| application(s) food and beverages | application(s) food and beverages | application(s) food and beverages | application(s) food and beverages |
| separation technique ion exchange | separation technique ion exchange | separation technique - | separation technique - |
General description
Using the QuEChERS method, food/agricultural samples are first extracted with an aqueous miscible solvent (e.g., acetonitrile) in the presence of high amounts of salts (e.g., sodium chloride and magnesium sulfate) and/or buffering agents (e.g. citrate) to induce liquid phase separation and stabilize acid and base labile pesticides, respectively. Upon shaking and centrifugation, an aliquot of the organic phase is subjected to further cleanup using SPE. Unlike traditional methods using SPE tubes, in dispersive SPE, cleanup is facilitated by mixing bulk amounts of SPE (e.g., Supelclean PSA, ENVI-Carb, and/or Discovery DSC-18) with the extract. After sample cleanup, the mixture is centrifuged and the resulting supernatant can either be analyzed directly or can be subjected to minor further treatment before analysis.
Supelco carries a line of vials and centrifuge tubes containing pre-determined amounts of salts and SPE sorbents to support the most common method configurations used today.
Legal Information
required but not provided
Storage Class Code
13 - Non Combustible Solids
WGK
WGK 1
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.
Related Content
QuEChERS is a ‘Quick, Easy, Cheap, Effective, Rugged and Safe’ sample cleanup method used to prepare food and agricultural samples for pesticides analysis. QuEChERS is based on the Solid Phase Extraction (SPE) technique of sample preparation.
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.
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