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一般描述
分散SPE法,通常也是指"QuEChERS” 方法(快速,简便,便宜,有效,耐用和安全),是一种现代样本准备技术,正在越来越多地被用在食品和农业产品多残基杀虫剂分析领域。
使用QuEChERS方法,食品/农产品样本首先在水溶性溶剂(比如乙腈),在高盐(比如氯化钠和硫酸镁)和或者缓冲试剂(比如柠檬酸盐)存在下,进行提取。高盐能够引起液相分离,而缓冲试剂能够稳定酸碱不稳定杀虫剂。 在摇晃和离心之后,有机相部分就进一步用SPE清洁。 和传统的SPE管方法不同,在分散SPE中,清洁需要混合大量的SPE(比如Supelclean PSA, ENVI-Carb, 和或者Discovery DSC-18)和提取物。 在样本清洁后,混合物经过离心,得到的上清可以直接分析,或者在分析前需要很少的处理。
Supelco有一系列的管和离心管,含有预置量的盐和SPE吸附剂,能够支持现今最常用的方法。
使用QuEChERS方法,食品/农产品样本首先在水溶性溶剂(比如乙腈),在高盐(比如氯化钠和硫酸镁)和或者缓冲试剂(比如柠檬酸盐)存在下,进行提取。高盐能够引起液相分离,而缓冲试剂能够稳定酸碱不稳定杀虫剂。 在摇晃和离心之后,有机相部分就进一步用SPE清洁。 和传统的SPE管方法不同,在分散SPE中,清洁需要混合大量的SPE(比如Supelclean PSA, ENVI-Carb, 和或者Discovery DSC-18)和提取物。 在样本清洁后,混合物经过离心,得到的上清可以直接分析,或者在分析前需要很少的处理。
Supelco有一系列的管和离心管,含有预置量的盐和SPE吸附剂,能够支持现今最常用的方法。
相容性
与大多数QuEChERS振荡器相容。
其他说明
Supel™ QuE Z-Sep产品通过有效去除样品提取物中比传统QuEChERS方法中更多的脂肪和颜色,增强了对复杂基质的样品清理。通过消除有问题的基质干扰,Z-Sep产品提供了更稳健的LC-MS和GC-MS方法。这种专利技术可以取代C18和PSA在您当前的方法,而无需额外的方法开发。
建议使用Z-Sep +清除脂肪含量超过15%的样品。
建议使用Z-Sep/C18清除脂肪含量低于15%的样品。
建议在分析疏水性分析物之前使用Z-Sep清理样品。
建议使用Z-Sep +清除脂肪含量超过15%的样品。
建议使用Z-Sep/C18清除脂肪含量低于15%的样品。
建议在分析疏水性分析物之前使用Z-Sep清理样品。
法律信息
本产品的某些用途可能包含在一项或多项未决专利申请的权利要求中。有关许可证查询,请联系techserv@sial.com
AOAC is a registered trademark of AOAC International
Supel is a trademark of Sigma-Aldrich Co. LLC
储存分类代码
11 - Combustible Solids
WGK
WGK 3
闪点(°F)
Not applicable
闪点(°C)
Not applicable
Martina Rejtharová et al.
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 35(2), 233-240 (2017-10-06)
A sensitive and robust confirmatory method for determination of steroid esters in blood serum is essential for reliable monitoring of possible illegal use of steroid hormones as growth promoters in meat production. A previously used sample preparation methodology was improved.
Ana Lozano et al.
Talanta, 118, 68-83 (2013-11-28)
Two sorbents containing ZrO₂ (Z-Sep and Z-Sep+) were tested as a d-SPE clean-up in combination with the QuEChERS and ethyl acetate multiresidue method in the pesticide residues extraction in avocado. All extracts were analysed using gas chromatography coupled with a
Jonatan V Dias et al.
Journal of chromatography. A, 1462, 8-18 (2016-08-11)
The goal of this work was to evaluate the efficiency of several sorbents on removal fats from edible oils (olive, soya and sunflower) during the clean-up step for posterior determination of 165 pesticides by UHPLC-QqQ-MS/MS system. The extraction procedure employed
Piotr Kaczynski et al.
Ecotoxicology and environmental safety, 139, 124-131 (2017-01-28)
Highly toxic insecticides (HTIs) belonging to different chemical groups are dangerous to pollinating organisms, even in sublethal doses. An important objective of this study was to develop a method to determine over fifty HTIs at very low concentrations in the
Darina Lankova et al.
Analytical and bioanalytical chemistry, 408(10), 2515-2525 (2016-02-11)
In this study, a novel analytical approach for the determination of 11 monohydroxylated polycyclic aromatic hydrocarbon metabolites (OH-PAHs) in urine was developed and validated. The rapid, simple and high-throughput sample preparation procedure based on ethyl acetate extraction and subsequent purification
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Assessment of clean-up sorbents for extracting PAHs from salmon and PCBs from milk, optimized for GC analysis with MS and ECD detection.
相关内容
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.
QuEChERS方法简化了食品和农业样品农残分析的样品纯化步骤。
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