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2-氯甲苯_95-49-8,2-氯甲苯
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2-氯甲苯

BW901082 {{goodObj.price > 0 ? '¥' + goodObj.price : '咨询'}} ¥{{goodObj.sell_price || 0}} 咨询 95-49-8 250mg {{goodObj.date}} 秦境 {{item.norm}} 99.0% {{inventory}}
2-氯甲苯介绍:

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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GB 11890-89 水质 苯系物的测定 气相色谱法
标准名称及标准号GB 11890-89《水质 苯系物的测定 气相色谱法》
适用范围适用于地表水、地下水及工业废水中苯系物(包括2-氯甲苯)的测定。
核心检测方法采用气相色谱法(GC)结合氢火焰离子化检测器(FID)或电子捕获检测器(ECD),通过萃取富集后进样分析。
检出限与定量限检出限为0.01 μg/L,定量限为0.05 μg/L(ECD检测器条件下)。
质控样品要求每批样品需包含空白样品、平行样及加标回收样,回收率应控制在80%-120%。
关键实验步骤液液萃取(正己烷为萃取剂)、氮吹浓缩、色谱柱选择(极性毛细管柱)、程序升温分离。
特别说明避免使用含卤代烃溶剂的实验环境,防止交叉污染;2-氯甲苯应与其他同分异构体色谱峰分离。
GBZ/T 300.1-2017 工作场所空气有毒物质测定 卤代不饱和脂烃化合物
标准名称及标准号GBZ/T 300.1-2017《工作场所空气有毒物质测定 第1部分:卤代不饱和脂烃化合物》
适用范围适用于职业卫生监测中工作场所空气内2-氯甲苯等卤代烃的气相色谱测定。
核心检测方法固体吸附管采样(活性炭或Tenax管),热脱附或溶剂解吸后经GC-MS或GC-FID分析。
检出限与定量限检出限为0.5 μg/m³,定量限为1.5 μg/m³(采样体积15L)。
质控样品要求每20个样品至少添加1个运输空白及实验室空白,相对标准偏差(RSD)应≤15%。
关键实验步骤采样流量校准(0.1-1.0 L/min)、吸附管解吸效率验证(≥85%)、质谱定性确认保留时间。
特别说明需关注2-氯甲苯与邻氯甲苯的共流出现象,推荐使用质谱法进行确证。
水质 挥发性有机物的测定 吹扫捕集/气相色谱-质谱法
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》
适用范围适用于饮用水、地下水和地表水中2-氯甲苯等挥发性有机物的痕量分析。
核心检测方法吹扫捕集技术富集样品,GC-MS联用分析,通过特征离子碎片(m/z 91、126)定性定量。
检出限与定量限方法检出限为0.05 μg/L,定量下限为0.2 μg/L。
质控样品要求每批样品应包含基体加标样和实验室空白,同位素内标回收率需在70%-130%。
关键实验步骤吹扫时间优化(11分钟)、捕集阱活化温度(180℃)、色谱柱选择(DB-624等弱极性柱)。
特别说明需在样品瓶中添加盐酸或硫酸钠抑制生物降解,样品保存时间不超过14天。

以上信息仅供参考,请以相应标准的原文为准!