A gold nanoparticles enhanced low temperature plasma ionization mass spectrometry was developed for the rapid determination of aniline.As an ambient mass spectrometry ion source,low temperature plasma(LTP) could meet the requirements for in situ and rapid detection.However,the matrix effect of water sample makes the detection sensitivity inadequate.In this study,low temperature plasma ion source was combined with gold nanoparticles modified acupuncture needles to create a good enhancement effect toward the mass spectrometry signal,which could be used to quickly and sensitively detect aniline.Results showed that the signal intensity for aniline is 56 times stronger.Meanwhile,the background noise is lower.There is a linear relationship between the signal intensity and the concentration of aniline in the range of 1-50 μg/L,with a detection limit(LOD) of 064 μg/L,and the consuming time for each sample is about 1 min.The proposed method herein is simple and easy to operate,and is expected to be applied in the detection of aniline in environmental water.