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三乙二醇二甲醚

BW903002

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112-49-2

0.5mL

秦境

99.0%

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三乙二醇二甲醚介绍：

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.

Product Name	Triethylene glycol dimethyl ether
Product Code	BW903002
Lot Number	23041524
CAS No.	112-49-2
Mol. Formula	C₈H₁₈O₄
Mol. Weight	178.23
Certified on	14 Apr 2023
Expiry Date	13 Apr 2025
Storage Temp	(0~4)°C
Specification	0.5 mL

CERTIFIED

Purity

CERTIFIED

Expanded Uncertainty (U)

Approved by

99.0%

0.5%

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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国标解读：三乙二醇二甲醚（CAS:112-49-2）相关标准

标准名称及标准号	GB/T 31413-2015 《化学试剂三乙二醇二甲醚的测定》
适用范围	适用于三乙二醇二甲醚的纯度测定、杂质分析及化学试剂的质量控制。
核心检测方法	采用气相色谱法（GC）进行分离检测，通过内标法或面积归一化法进行定量分析。
检出限与定量限	检出限为0.01%（质量分数），定量限为0.05%（质量分数）。
质控样品要求	需使用纯度≥99.5%的标准物质作为质控样品，保存于阴凉避光环境，定期验证稳定性。
关键实验步骤	1. 样品预处理（稀释或溶解）；2. 色谱条件优化（柱温、载气流速）；3. 定量分析及数据处理。
特别说明	实验过程中需避免接触强氧化剂，防止分解；气相色谱进样口温度不得超过250℃。

标准名称及标准号	HJ 639-2012 《水质挥发性有机物的测定顶空/气相色谱-质谱法》
适用范围	适用于环境水体中三乙二醇二甲醚等挥发性有机物的定性及定量分析。
核心检测方法	顶空进样-气相色谱质谱联用法（HS-GC/MS），以特征离子峰进行定性定量。
检出限与定量限	检出限为0.1 μg/L，定量限为0.3 μg/L。
质控样品要求	需使用基质加标样品进行回收率验证，回收率范围应为70%-120%。
关键实验步骤	1. 顶空瓶密封性检查；2. 平衡温度与时间优化；3. 质谱数据采集与分析。
特别说明	样品需在24小时内完成分析，防止挥发损失；避免使用含氟橡胶密封垫。

标准名称及标准号	GB/T 33069-2016 《工业用三乙二醇二甲醚》
适用范围	规范工业用途中三乙二醇二甲醚的技术要求、试验方法及检验规则。
核心检测方法	卡尔费休法测定水分含量，折射率法辅助验证纯度，重金属检测采用ICP-MS。
检出限与定量限	水分检出限为0.005%（质量分数），重金属（以Pb计）检出限为0.1 mg/kg。
质控样品要求	每批次至少插入1个已知浓度的质控样，结果偏差需≤5%。
关键实验步骤	1. 样品均匀化处理；2. 仪器校准（折射仪、水分仪）；3. 多参数同步检测。
特别说明	需在惰性气体保护下进行取样，防止吸湿；重金属检测需使用微波消解前处理。

以上信息仅供参考，请以相应标准的原文为准！