正戊醇_单标_有机类_标准物质_萘析商城

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正戊醇

BW901078

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71-41-0

0.5mL

秦境

99.5%

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二硫化碳中正戊醇溶液标准物质
BW04825 | 1000μg/mL
二硫化碳中正戊醇溶液标准物质
BW04826 | 100μg/mL
正庚醇
BW2243-5ml | GC≥99.5%
正丁醇
BW2997-1mL | ≥99%
正戊醇
1ST001509-10ml | 见证书
正戊醇
1ST001509-1ml | 见证书
正戊醇
1ST001509-2ml | 见证书

正戊醇介绍：

Method of Characterisation

GC/FID

Batch Information

Water Content: <0.1% (by Karl-Fischer-Titration)

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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标准名称及标准号
标准号	GB/T 5009.38-2021
标准名称	食品中有害污染物监测技术规范

适用范围
适用于食品中正戊醇等挥发性有机污染物的检测，涵盖原料、加工食品及包装材料的监测。

核心检测方法
采用气相色谱-质谱联用法（GC-MS），通过液液萃取或顶空进样技术提取目标物，定性定量分析。

检出限与定量限
检出限（LOD）	0.05 mg/kg
定量限（LOQ）	0.2 mg/kg

质控样品要求
每批次检测需包含空白样、平行样及加标回收样： 1. 平行样偏差≤15%； 2. 加标回收率80%-120%； 3. 空白样中目标物应未检出。

关键实验步骤
1. 样品前处理：采用正己烷振荡萃取，离心后取上清液； 2. 气相色谱条件：毛细管柱（DB-5MS），程序升温（50℃初始，以10℃/min升至250℃）； 3. 质谱参数：电子轰击源（EI），全扫描模式（m/z 40-300）。

特别说明
1. 避免使用含同类挥发性物质的实验耗材； 2. 正戊醇需低温避光保存； 3. 方法不适用于脂肪含量>20%的样品，需额外脱脂处理。

以上信息仅供参考，请以相应标准的原文为准！