固相微萃取GCMS分析饮用水中的土霉素

　　Introduction

　　This note describes a technique for the analysis of these two compounds using automated headspace/SPME sampling in conjunction with the Thermo Scientific TRACE GC Ultra and Thermo Scientific DSQII single quadrupole mass spectrometer,with linearity and sensitivity between 1and 1000 ppt(ng/L).

　　Instrument

　　Thermo Scientific TRACE GC Ultra

　　Thermo Scientific DSQII single quadrupole mass spectrometer

　　Conclusion

　　The technique of SPME configured on the TriPlus Duo,together with the TRACE GC Ultra gas chromatograph and DSQⅡ GC/MS working in SIM mode permits target compounds to be accurately quantified over a concentration range of at least three decades.Method detection limits for geosmin and 2-MIB were less than 0.3 ppt-less than the concentrations typically detected by humans.The optimized ensures optimal fiber lifetime while ensuring precise operation and efficient extractions.Ease of data processing is enhanced with the use of EnviroLab reporting,which offers rapid data review and standard forms for quality control and high sample throughput.