Properties:
| Related Categories | Analytical/Chromatography, Sample Preparation & Purification, Shaker Compatible 15 mL QuEChERS Cleanup Tubes, Solid Phase Extraction (SPE), Supel QuE (QuEChERS) Products, |
| composition | Magnesium Sulfate, 900 mg |
| Z-Sep, 300 mg | |
| packaging | pk of 50 |
| centrifuge tube volume | 15 mL , Shaker Compatible |
Description:
Compatibility
Compatible with most QuEChERS shakers.
General description
Dispersive SPE (dSPE), often referred to as the "QuEChERS" method (Quick, Easy, Cheap, Effective, Rugged, and Safe), is modern sample prep technique that is becoming increasingly popular in the area of multi-residue pesticide analysis in food and agricultural products.
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
Certain uses of this product may be covered by the claims of one or more pending patent applications. For licensing inquiries please contact techserv@sial.com
Supel is a trademark of Sigma-Aldrich Co. LLC
Other Notes
Supel™ QuE Z-Sep products enhance sample cleanup for complex matrices by effectively removing more fat and color from sample extracts than traditional phases for QuEChERS methods. By eliminating problematic matrix interferences, Z-Sep products provide more robust LC-MS and GC-MS methods. This proprietary technology can replace C18 and PSA in your current methods without additional method development.
Z-Sep+ is recommended for cleanup of samples containing greater than 15% fat.
Z-Sep/C18 is recommended for cleanup of samples containing less than 15% fat.
Z-Sep is recommended for cleanup of samples prior to analysis of hydrophobic analytes.
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免疫组化多聚物法
immunohistochemistry
英[ɪmjʊnəʊhɪstəʊ'kemɪstrɪ]
美[ɪmjʊnoʊhɪstoʊ'kemɪstrɪ]
[词典]免疫组织化学;
[例句]Methods Transmission electron microscope and immunohistochemistry were used.
方法采用透射电镜和免疫组化法。
英 [ˈpɒlɪmə(r)]
美 [ˈpɑ:lɪmə(r)]
n.
多聚物; [高分子] 聚合物;
[例句]The nature of the polymer is currently a trade secret.
这一聚合物的性质目前是个商业机密。
[其他]
复数：polymers
高分子化合物又称高分子（聚合物），高分子是由分子量很大的长链分子所组成，高分子的分子量从几千到几十万甚至几百万。而每个分子链都是由共价键联合的成百上千的一种或多种小分子构造而成。高分子的分类有多种，按来源可分为天然高分子、天然高分子衍生物、合成高分子三大类；根据用途则可分为合成树脂和塑料、合成橡胶、合成纤维等；按热行为可分为热塑性和热固性聚合物；按主链结构可分为碳链、杂链、和元素有机三类；另外根据工业产量和价格还可分为通用高分子、中间高分子、工程塑料以及特种高分子等等。
Author：AndrewJ.Hall,MilenaQuaglia,PanagiotisManesiotis,ErsiliaDeLorenzi,andBörjeSellergren
Resource:AnalyticalChemistry,2006,78(24):8362-8367.
Abstract：
Arangeof2-acrylamidopyridines,showingsubtledifferencesinsolutionbindingtowardcarboxylicacids,hasbeeninvestigatedasfunctionalmonomersinmolecularimprinting.ImprintingofN-Z-L-glutamicacidwithonesuchmonomerisshowntobeeffectiveinthecreationofamolecularlyimprintedpolymer(MIP)withrecognitionpropertiesforitstemplateandalsoforlargermoleculescontainingglutamicacidresidues.IncomparisontoaMIPpreparedviaamore"trADItional"approach,thenewpolymericreceptorsexhibitreducednonspecificbinding.Thenewreceptorsarecomparedwithpreviouslyreportedurea-basedreceptorstargetingtheglutamicacidresidueandreceptorstargetingthepteridinesubstructureoffolicacid.
PMID:17165828
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