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正壬烷

BW901114

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100mg

秦境

98.4%

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正壬烷介绍：

REFERENCE MATERIAL CERTIFICATE

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-Nonane
Product Code	BW901114
Lot Number	23091528
CAS No.	111-84-2
Mol. Formula	C₉H₂₀
Mol. Weight	128.26
Certified on	13 Sep 2023
Expiry Date	12 Sep 2026
Storage Temp	20°C ± 4°C
Specification	100mg

CERTIFIED

Purity

CERTIFIED

Expanded Uncertainty (U)

Approved by

98.4%

1.0%

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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本公司销售的所有产品仅供实验科研使用，不用于人体及临床诊断。

1. 标准名称及标准号

GB/T 18883-2002《室内空气质量标准》

HJ 644-2013《环境空气挥发性有机物的测定吸附管采样-热脱附/气相色谱-质谱法》

2. 适用范围

GB/T 18883-2002：适用于室内空气中总挥发性有机物（TVOC）的检测，包含正壬烷等组分。

HJ 644-2013：适用于环境空气及无组织排放废气中挥发性有机物的测定，包括正壬烷的定性和定量分析。

3. 核心检测方法

HJ 644-2013：采用吸附管采样，热脱附后使用气相色谱-质谱联用仪（GC-MS）进行分离和检测，正壬烷通过保留时间和质谱图特征离子定性。

4. 检出限与定量限

HJ 644-2013：正壬烷的检出限为0.05 μg/m³（以采样体积12 L计），定量限为0.15 μg/m³。

5. 质控样品要求

每批次样品需至少包含1个空白样、1个平行样及1个加标回收样。平行样相对偏差应≤20%，加标回收率需控制在80%-120%之间。

6. 关键实验步骤

(1) 吸附管采样：以100-200 mL/min流量采集空气样品，确保采样体积符合检测限要求。

(2) 热脱附：将吸附管在300℃以上脱附，用氦气作为载气转移至冷阱聚焦。

(3) GC-MS分析：设置柱温箱程序升温（如40℃保持3 min，以10℃/min升至250℃），质谱采用全扫描模式。

7. 特别说明

实验过程中需避免使用含正壬烷的溶剂清洗设备，防止交叉污染。吸附管保存前需用高纯氮气吹扫10分钟。

以上信息仅供参考，请以相应标准的原文为准！