乙二醇乙醚_单标_有机类_标准物质_萘析商城

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乙二醇乙醚

BW903003

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110-80-5

0.5mL

秦境

99.5%

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乙二醇乙醚介绍：

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 external 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

GBZ/T 160.48-2007《工作场所空气有毒物质测定醇醚类化合物》

适用范围

本标准适用于工作场所空气中乙二醇乙醚浓度的检测，包括采样、样品处理及气相色谱分析流程。

核心检测方法

采用溶剂解吸-气相色谱法（氢火焰离子化检测器，FID）。样品通过活性炭管采集，二硫化碳解吸后进样分析。

检出限与定量限

检出限为0.5 μg/mL（按采样体积15L计，最低检出浓度0.03 mg/m³）；定量限为1.6 μg/mL。

质控样品要求

每批次需包含空白样品和加标质控样，加标回收率应控制在85%-110%，相对标准偏差（RSD）≤10%。

关键实验步骤

1. 采样：活性炭管以0.5 L/min流量采集空气样品15L；
2. 解吸：加入1 mL二硫化碳振荡解吸30分钟；
3. 分析：气相色谱进样1 μL，按保留时间定性，峰面积定量。

特别说明

1. 乙二醇乙醚易挥发，需在4℃以下保存样品；
2. 避免使用塑料容器接触样品，防止干扰；
3. 色谱柱推荐极性柱（如HP-INNOWAX）。

以上信息仅供参考，请以相应标准的原文为准！