水合三氯乙醛_单标_有机类_标准物质_萘析商城

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水合三氯乙醛

BW901069

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302-17-0

250mg

秦境

98.5%

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水合三氯乙醛介绍：

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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相关国家标准解读

标准名称及标准号

HJ 1004-2018《水质三氯乙醛的测定气相色谱法》

适用范围	适用于地表水、地下水、生活污水和工业废水中三氯乙醛的测定，方法检出限为0.02 μg/L，测定下限为0.08 μg/L。

核心检测方法

采用气相色谱-电子捕获检测器（GC-ECD），样品经液液萃取或固相萃取富集后上机分析，分离并定量目标化合物。

检出限与定量限

方法检出限（MDL）为0.02 μg/L，定量限（LOQ）为0.08 μg/L。实际检测中需根据样品基质验证性能指标。

质控样品要求

每批次样品至少包含1个空白样品、1个平行样和1个加标回收样。回收率应在70%-130%之间，平行样相对偏差≤20%。

关键实验步骤

1. 样品酸化至pH≤2；
2. 使用正己烷萃取并浓缩；
3. GC-ECD分析，采用DB-5色谱柱（30 m×0.32 mm×0.25 μm）；
4. 外标法定量。

特别说明	1. 样品需在4℃冷藏保存并24小时内完成萃取； 2. 避免使用含氯溶剂导致干扰； 3. 高浓度样品需稀释至线性范围内。

以上信息仅供参考，请以相应标准的原文为准！