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噻吩黄隆

BW902031

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79277-27-3

100mg

秦境

98.1%

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噻吩黄隆介绍：

Reference Material

This certificate is designed in accordance with ISO 17034 and ISO Guide 31. This reference material (RM) was designed,produced and verified in accordance with ISO/IEC 17025, ISO 17034 and a registered quality management system ISO9001.

Uncertainty

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

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

Intended Use

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

Safety

Proper precautions should be observed while handling. See Safety Data Sheet.

Traceability

The balances used for gravimetric measurements are calibrated with weights traceable to the national standards (DKD). The calibration of the balances is verified daily internally and annually by an external7 accredited calibration service. Chromatographic methods are traceable to the International System of Units (SI).

Homogeneity

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

Storage

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

Instructions for use

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

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标准名称及标准号

《GB 23200.121-2021 食品安全国家标准植物源性食品中噻吩磺隆残留量的测定液相色谱-串联质谱法》

适用范围

适用于谷物、蔬菜、水果等植物源性食品中噻吩磺隆残留量的测定。适用于定量限（LOQ）范围为0.01-0.05 mg/kg的样品检测。

核心检测方法

采用液相色谱-串联质谱法（LC-MS/MS）。样品经乙腈提取、QuEChERS净化后，通过C18色谱柱分离，多反应监测模式（MRM）进行定量分析。

检出限与定量限

方法检出限（LOD）为0.003 mg/kg，定量限（LOQ）为0.01 mg/kg。需依据基质类型调整线性范围，常规校准曲线浓度范围为0.01-0.5 mg/L。

质控样品要求

每批次样品需包含空白基质、基质加标样品（加标浓度为LOQ水平）和实验室控制样品（LCS）。回收率应满足70%-120%，相对标准偏差（RSD）≤20%。

关键实验步骤

1. 样品均质：将样品粉碎至粒径≤2 mm；
2. 提取：乙腈振荡提取30 min，加入无水硫酸镁与氯化钠分层；
3. 净化：取上清液经PSA和C18填料净化；
4. 仪器条件：流动相为0.1%甲酸水-乙腈，流速0.3 mL/min，柱温40℃。

特别说明

1. 噻吩磺隆对光和热敏感，需避光操作并控制提取温度≤25℃；
2. 避免使用含磷酸盐的缓冲溶液，以防干扰离子化效率；
3. 若基质效应＞20%，需采用基质匹配标准校正。

以上信息仅供参考，请以相应标准的原文为准！