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一般說明
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。
其他說明
与 QuEChERS LC-MS 方法的传统相相比,Supel™ QuE Z-Sep + 可有效去除样本萃取物中更多的脂肪和颜色,从而提高样本对复杂基质的清除能力。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 方法。这种专有技术可以替代当前方法中的C18和PSA,无需额外的方法开发。
建议使用 Z-Sep + 清除脂肪含量超过 15% 的样本。
建议使用 Z-Sep + 清除脂肪含量超过 15% 的样本。
法律資訊
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。如需许可咨询,请联系[email protected]
Supel is a trademark of Sigma-Aldrich Co. LLC
應用
產品號碼
描述
訂價
儲存類別代碼
11 - Combustible Solids
水污染物質分類(WGK)
nwg
閃點(°F)
Not applicable
閃點(°C)
Not applicable
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文章
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相關內容
Supelco's Z-Sep+ sorbent effectively removes fat and pigment interferences from avocado, with good pesticide recoveries; it removes more matrix than traditional PSA/C18 sorbent, and produces a lower background for GC-MS analysis.
Chromatograms
suitable for GC, application for SPEsuitable for GC, application for SPEActive Filters
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