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正己烷

BW901023

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110-54-3

0.5mL

秦境

98.5%

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正己烷介绍：

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	n-Hexane
Product Code	BW901023
Lot Number	23041531
CAS No.	110-54-3
Mol. Formula	C₆H₁₄
Mol. Weight	86.18
Certified on	18 Apr 2023
Expiry Date	17 Apr 2025
Storage Temp	(0~4)°C
Specification	0.5 mL

CERTIFIED

Purity

CERTIFIED

Expanded Uncertainty (U)

Approved by

98.5%

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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标准名称及标准号

GBZ/T 160.41-2004《工作场所空气有毒物质测定烷烃类化合物》

适用范围

本标准适用于工作场所空气中正己烷的浓度检测，包括车间、实验室等职业卫生环境中的短时间接触容许浓度（STEL）和时间加权平均浓度（TWA）测定。

核心检测方法

采用活性炭管采集空气样品，经二硫化碳解吸后，使用气相色谱-氢火焰离子化检测器（GC-FID）进行定量分析。色谱柱推荐使用毛细管柱（如HP-1或等效型号）。

检出限与定量限

方法检出限为0.05 μg/mL，定量限为0.2 μg/mL。采样体积按10 L计，最低检测浓度为0.5 mg/m³。

质控样品要求

每批次样品需包含空白对照、加标回收样品及平行样。加标回收率应控制在85%-115%，相对标准偏差（RSD）≤10%。

关键实验步骤

1. 样品采集：活性炭管以0.5 L/min流量采集15分钟；
2. 解吸处理：加入1 mL二硫化碳超声解吸30分钟；
3. 仪器分析：进样量1 μL，分流比10:1，柱温程序从50℃升至200℃。

特别说明

1. 正己烷易挥发，采样后需密封冷藏并于7天内分析；
2. 二硫化碳属易燃有毒试剂，应在通风橱内操作；
3. 需定期校验色谱系统（保留时间偏差≤2%）。

以上信息仅供参考，请以相应标准的原文为准！