色谱科 默克Supelco Diquat metabolite TOPPS，有证参比物质，TraceCERT®，生产商：瑞士Sigma-Aldrich Production GmbH

产品概述

This certified reference material (CRM) is produced and certified in accordance with ISO/IEC 17025 and ISO 17034. This CRM is traceable to primary material from an NMI, e.g. NIST or NMIJ.
Certified content by quantitative NMR incl. uncertainty and expiry date are given on the certificate.
Download your certificate at: http://www.sigma-aldrich.com

Diquat metabolite TOPPS is a common degradation product of diquat. Diquat is a nonselective, defoliant, preharvest, and non-residual bipyridyl herbicide and crop desiccant, normally used as the dibromide salt, to control broad-leaved weeds and grasses. Its activity is based on the liberation of the superoxide anion radical and, subsequently, hydrogen peroxide, leading to tissue destruction by oxidative stress. The herbicidal activity of diquat is more pronounced in daylight, aerobic conditions, high humidity, and temperature.

As per Regulation (EC) No 1107/2009, repealing the directive 91/414/ECC, diquat is not approved for use in the European Union (EU). The maximum residue limit (MRL) for diquat presence in the crops varies between 0.01 mg/kg in most of the commodities to 5 mg/kg for linseed in accordance with Regulation (EU) 2016/1002.

应用领域

有证参比物质（CRM）预期用作色谱法和其他分析技术的校准品。

其他说明

在我们的在线平台ChemisTwin® for NMR上找到该产品的数字参考物质。您可以在ChemisTwin®上使用该数字参考物质进行样品身份确认和化合物定量（使用数字外标）。可以查看该物质的NMR光谱，并通过点击几下鼠标即可与您的样品进行在线比较。在此处了解更多信息并开始免费试用。

技术规格