Determination of formaldehyde and benzene compounds in water by headspace capillary gas chromatography _
In order to allow the masses to drink clean water, the new standard of drinking water has been revised and announced the implementation of the new increase in the 69 toxicological indicators, including benzene series. Benzene can cause cancer, and other benzene compounds are toxic to humans and aquatic plants. Benzene, benzene, toluene, xylene is the most common and most important solvents and chemical raw materials, benzene series in case of pollution of water, it will cause harm to people. Formaldehyde is widely present in the environment, there is a strong stimulus to the human body.
Tengzhou Xiangying Determination Technology Co. Ltd. established benzenes.
Methods: the determination of Benzene Series in water by XiangyingGC7990plus automatic headspace capillary gas chromatography was used to optimize the chromatographic conditions and the headspace conditions.
Results: 8 kinds of components in 7 min to complete the determination and has a good separation effect; in 1 g/L ~ 100 g/L concentration range can get better linearity, correlation coefficient 0.999. The synthetic water samples and standards were determined by the established method, and the variation coefficient was 1.6% ~ 6.5%. The minimum detection concentration is 0.5 g / L (benzene and toluene), 1 g / L (ethylbenzene, styrene, o-xylene and Cumene), 2 g / L (of m-xylene,).
Conclusion: the established method is simple, rapid and has good precision and accuracy. It can be used for the determination of benzene in water
为了让人民群众能喝上干净的水,新的《生活饮用水标准》进行了修订并公布实施,新增加的毒理指标69项,其中包括苯系物。苯具有致癌致畸性,其他苯系物对人和水生植物毒性也很大。苯系物尤其是苯、甲苯、二甲苯是*常见*重要的溶剂和化工原料,苯系物万一污染水源,就会对人们身体造成伤害。甲醛广泛存在于环境中,对人体有强烈的刺激。
滕州市翔鹰分析技术有限公司建立水中苯系物的测定方法。
方法:优化色谱条件和顶空条件,采用XiangyingGC7990plus自动顶空毛细管气相色谱法测定水中苯系物。
结果:8种组分在7 min内完成测定并具有较好的分离效果;在1μg/L~100μg/L浓度范围内可获得较好的线性,相关系数0.999。用建立的方法对人工合成水样、标准进行测定,变异系数1.6%~6.5%。*低检测质量浓度为0.5μg/L(苯、甲苯),1μg/L(乙苯、苯乙烯、邻二甲苯、异丙苯),2μg/L(对、间二甲苯)。
结论:所建立的方法简便、快速,具有较好的精密度与准确度,可用于水中苯系物的测定。
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