1,3-二乙基脲_单标_有机类_标准物质_萘析商城

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1,3-二乙基脲

BW905017

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623-76-7

100mg

秦境

98.0%

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1,3-二乙基脲介绍：

Uncertainty

The certified value(s) and uncertainty(ies) aredetermined in accordance with ISO 17034 with an 95% confidence level (k=2).Uncertainty is based on the Total Combined Uncertainty, including uncertaintiesof characterisation, homogeneity and stability testing. Stability values are basedon real evidence opposed to simulation.

The producer certifies that this reference materialmeets the specification stated in this certificate until the expiry date,provided it is stored unopened at the recommended temperature herein. Productwarranties for this reference material are set out in the terms and conditionsof purchase.

Intended Use

This RM is intended for use in a laboratory as acalibration and quality control standard or in method development foranalytical techniques.

Safety

Proper precautions should be observed whilehandling. See Safety Data Sheet.

Traceability

The balances used for gravimetric measurements arecalibrated with weights traceable to the national standards (DKD). Thecalibration of the balances is verified daily internally and annually by anexternal7 accredited calibration service. Chromatographic methods are traceableto the International System of Units (SI).

Homogeneity

Random replicate samples of the final packaged RMhave been analysed to prove homogeneity compliant with ISO 17034.

Storage

The RM should be stored in the original sealedcontainer at the indicated temperature.

Instructions for use

It is recommended to use 1 mg as the minimum samplesize and if less material is used, to increase the certified uncertainty by afactor of two for half sample and four for a quarter of sample. If storageafter opening is necessary, the RM should be tightly closed and kept from lightand moisture. If the RM was in a sealed ampoule, it should be transferred to avial with minimum head space.

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1. 标准名称及标准号

与1,3-二乙基脲相关度最高的国家标准为《GB 23200.113-2018 食品安全国家标准植物源性食品中208种农药及其代谢物残留量的测定液相色谱-质谱联用法》。

2. 适用范围

适用于植物源性食品中包括氨基甲酸酯类农药及其代谢物（如1,3-二乙基脲）的残留量检测，覆盖谷物、蔬菜、水果等样品类型。

3. 核心检测方法

采用液相色谱-串联质谱法（LC-MS/MS），通过多反应监测（MRM）模式对目标物进行定性与定量分析，要求保留时间和离子丰度比与标准物质一致。

4. 检出限与定量限

检出限（LOD）为0.005 mg/kg，定量限（LOQ）为0.01 mg/kg。具体数值可能因仪器灵敏度及基质干扰略有波动。

5. 质控样品要求

每批次样品需设置空白对照、基质加标样品（加标浓度0.01-0.1 mg/kg），加标回收率需控制在70%-120%，重复测试相对标准偏差（RSD）≤20%。

6. 关键实验步骤

样品经乙腈提取、QuEChERS净化后进样分析。色谱柱选用C18柱（2.1 mm×100 mm, 1.8 μm），流动相为0.1%甲酸水-乙腈梯度洗脱，质谱电离模式为电喷雾正离子（ESI+）。

7. 特别说明

1,3-二乙基脲在碱性条件下易分解，需控制提取液pH值≤7。若检测低浓度样品时信号受抑制，建议采用基质匹配标准曲线校正基质效应。

以上信息仅供参考，请以相应标准的原文为准！