七种挥发性有机物低浓度标准溶液保存期探讨  

Study on Storage Life of Seven Volatile Organic Ompounds Low Concentration Standard Solutions

作　　者：孙硕 宋海梅 王真 SUN Shuo;SONG Haimei;WANG Zhen(Binzhou Ecological Environment Monitoring Center of Shandong Province,Binzhou 256600,China)

机构地区：[1]山东省滨州生态环境监测中心,山东滨州256600

出　　处：《山东化工》2025年第4期172-174,共3页Shandong Chemical Industry

摘　　要：考察较低浓度的甲醇中4种挥发性有机物(三氯甲烷、四氯化碳、苯和甲苯)和甲醇中3种替代物(二溴氟甲烷、甲苯-d8、4-溴氟苯)标准溶液(5 mg/L)的有效保存期。将标准贮备液用甲醇稀释到中间液浓度,密封贮存于棕色螺口样品瓶中,用吹扫捕集-气相色谱质谱法测试,校准曲线及标准样品测试结果表明,在避光密封条件下,标准溶液在90 d内可使用,这降低了溶剂及挥发性有机物造成的环境污染,节约了标准溶液用量,简化实验流程、降低实验成本、提高实验效率。The effective storage life of 4 volatile organic compounds(trichloromethane,carbon tetrachloride,benzene and toluene)and 3 alternatives(dibromofluoromethane,toluene-d8,4-bromofluorobenzene)standard solutions(5 mg/L)in methanol with lower concentration were investigated.The standard reserve solution was diluted with methanol to the intermediate solution concentration,sealed in a brown screw sample bottle,and tested by purge and catch-gas chromatography-mass spectrometry.The standard solution can be used within 90 d.This reduces the environmental pollution caused by solvents and volatile organic compounds,saves the amount of standard solution,simplifies the experimental process,reduces the experimental cost,and improves the experimental efficiency.

关 键 词：挥发性有机物 气相色谱-质谱法 保存期 

分 类 号：O657.63[理学—分析化学]