摘要
目的:建立硅胶管吸附,实验室衍生、气质联用法测定室内空气中甲醛的方法。方法:采用硅胶吸附管直接现场定点采集空气,经过衍生,色谱柱分离,用气质联用SIM选择离子模式检测。结果:空气中甲醛的线性相关系数r大于0.999,精密度(RSD%)为5.80%~7.49%,回收率为83.9%~108.9%,检出限为0.015μg,按照采样体积为15 L计算,最低检测浓度为0.001 mg/m^(3)。结论:本方法具有抗干扰能力强、灵敏度高、精密度好、回收率高等优点,可以用来检测空气中甲醛含量。
Objective:A method for the determination of formaldehyde in indoor air by silica gel tube adsorption,laboratory derivation and gas chromatography-mass spectrometry(GC-MS)was established.Methods:The air was directly collected at a fixed point on site by silica gel adsorption tube,and after derivatization,chromatographic column separation,and detection by GC-MS with SIM selected ion mode.Results:The linear correlation coefficient r of formaldehyde in the air was greater than 0.999,the precision(RSD%)was 5.80%to 7.49%,the recovery rate was 83.9%to 108.9%,and the detection limit was 0.015μg.Calculated according to the sampling volume of 15 L,the lowest detection concentration was 0.001 mg/m^(3).Conclusion:The method has the advantages of strong anti-interference ability,high sensitivity,excellent precision and high recovery rate,which can be used to detect formaldehyde content in air.
作者
丁丽燕
刘国平
温伊蕾
刘烨
Ding Liyan;Liu Guoping;Wen Yilei;Liu Ye(Zhongshan Center for Disease Control and Prevention,Zhongshan 528403,China)
出处
《广东化工》
CAS
2022年第11期190-192,202,共4页
Guangdong Chemical Industry
基金
2019年中山市医学科研项目之气质联用技术在室内空气中甲醛测定的应用(20191A020417)。
关键词
甲醛
硅胶吸附管
衍生
气质联用仪
特征离子
formaldehyde
silica gel adsorption tube
derivatization
GC-MS
characteristic ion
