三氯乙烯_单标_有机类_标准物质_萘析商城

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三氯乙烯

BW901003

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79-01-6

500mg

秦境

98.6%

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三氯乙烯介绍：

Method of Characterisation

GC/FID

Batch Information

Water Content: <0.1% (by Karl-Fischer-Titration)

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 are basedon 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 anexternal7 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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1. 标准名称及标准号

HJ 639-2012《水质挥发性有机物的测定吹扫捕集/气相色谱-质谱法》

2. 适用范围

适用于地表水、地下水、海水、工业废水和生活污水中挥发性有机物（包括三氯乙烯）的测定。

3. 核心检测方法

通过吹扫捕集技术将水样中挥发性有机物富集至捕集管，热脱附后进入气相色谱-质谱联用仪（GC-MS）进行定性和定量分析。

4. 检出限与定量限

三氯乙烯的检出限为0.3 μg/L，定量限为1.2 μg/L。

5. 质控样品要求

每批次样品需包含空白样品（实验室空白、运输空白）、平行样和加标回收样。加标回收率应控制在70%-130%范围内。

6. 关键实验步骤

1. 吹扫时间：11 min；捕集温度：30℃；脱附温度：225℃。
2. 气相色谱条件：DB-624毛细管柱（60 m×0.25 mm×1.4 μm），程序升温从40℃升至240℃。
3. 质谱扫描模式：全扫描（Scan）或选择离子扫描（SIM）。

7. 特别说明

1. 三氯乙烯易挥发，样品需冷藏避光保存并在7天内完成分析。
2. 实验过程中需使用超纯水和高纯氮气以避免交叉污染。

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以上信息仅供参考，请以相应标准的原文为准！