变压器油中糠醛含量的检测  

Detection of furfural in transformer oil by gas chromatography

作　　者：唐峰 吕启深 向真 郁光 方华 Tang Feng;Lv Qishen;Xiang Zhen;Yu Guang;Fang Hua(Shenzhen Power Supply Co.,Ltd.,Shenzhen 518002,China;Shanghai Huaai Chromatography Analysis Co.,Ltd.,Shanghai 200940,China)

机构地区：[1]深圳供电局电力科学研究院,深圳518002 [2]上海华爱色谱分析技术有限公司,上海200940

出　　处：《分析仪器》2020年第5期104-106,共3页Analytical Instrumentation

摘　　要：变压器油中的糠醛含量是电力变压器固体绝缘老化的重要判据之一,本实验设计了一种新的变压器油中糠醛测量的气相色谱方法,利用去离子水将变压器油中糠醛萃取后,直接注入气相色谱仪中进行分析。配制了一系列的标准样品,通过对比,计算出糠醛的校正曲线,最后得出了油中糠醛的准确浓度。该方法采用了去离子水取代有机溶剂萃取,使用上相比液相色谱更安全可靠,运用氦离子检测器对水溶液中糠醛进行测量,其检测限能达到86ng/L。因此,更能满足对变压器油中低浓度糠醛分析的精度要求。Furfural content in transformer oil is one of the important criteria for solid insulation aging of power transformer.After being extracted with deionized water,furfural was analyzed by gas chromatograph directly.Compared with standard samples,the calibration curve of furfural was calculated,and the accurate concentration of furfural in oil was obtained.This method applies deionized water instead of organic solvent for extraction,which is safer and more reliable than liquid chromatography.The detection limit of furfural in aqueous solution is 86ng/L by helium ion detector.Therefore,it can meet the accuracy requirements of low concentration furfural analysis in transformer oil.

关 键 词：气相色谱法 糠醛 氦离子检测器 

分 类 号：TM41[电气工程—电器]