1,2,3-三甲苯_单标_有机类_标准物质_萘析商城

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1,2,3-三甲苯

BW901019

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526-73-8

0.5mL

秦境

93.0%

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1,2,3-三甲苯介绍：

Reference Material

This certificate is designed in accordance with ISO17034 and ISO Guide 31. This reference material (RM) was designed,produced andverified in accordance with ISO/IEC 17025, ISO 17034 and a registered qualitymanagement system ISO9001.

Product Name	1,2,3-Trimethylbenzene
Product Code	BW901019
Lot Number	25051501
CAS No.	526-73-8
Mol. Formula	C₉H₁₂
Mol. Weight	120.19
Certified on	01 May 2025
Expiry Date	30 Apr 2030
Storage Temp	4°C±4°C
Specification	0.5 mL

CERTIFIED

Purity

CERTIFIED

Expanded Uncertainty (U)

Approved by

93.0%1

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 arebased on 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 anexternal 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

GB/T 18883-2022《室内空气质量标准》

适用范围

本标准适用于室内空气中挥发性有机物（VOCs）的检测，包括1,2,3-三甲苯等组分的测定，覆盖居住、办公等密闭环境。

核心检测方法

采用气相色谱-质谱联用法（GC-MS）。样品经吸附管采集后热脱附，通过色谱分离后定性定量分析。

检出限与定量限

1,2,3-三甲苯的检出限为0.5 μg/m³，定量限为1.5 μg/m³，要求设备灵敏度≥10:1信噪比。

质控样品要求

需使用有证标准物质进行校准，每批次样品须包含空白样、平行样及加标回收样，回收率应控制在80%-120%。

关键实验步骤

1. 采样流量设定为50 mL/min，时间至少20分钟；
2. 热脱附温度设置为300℃，保持5分钟；
3. GC-MS进样口温度250℃，柱温程序从40℃升至200℃。

特别说明

实验过程需避免其他苯系物干扰，建议使用极性色谱柱（如HP-INNOWax）以提高分离效果。

以上信息仅供参考，请以相应标准的原文为准！