Abstract:Based on the irrigation water, soil, tumorous stem mustard, semi-finished pickle mustard and pickle mustard, the content and correlation of harmful elements in export pickle mustard in Chongqing city, P.R. China were comprehensively analyzed in this study, which provides a scientific basis for the safety evaluation of export pickle mustard. The content of Hg, As, Cd, Pb, Cr and Al in the samples were determined by atomic absorption spectrometry, atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry. The results showed that the contents of Hg, Cd, Pb and Cr in irrigation water samples were lower than the national standard limits of China, among which As contents were higher than the standard limits in 3 samples, and the over-standard rate was 17%. The contents of As, Pb and Cr in soil samples were lower than the national standard limits. The content of Hg was higher than the standard limits in 1 sample, while Cd contents were higher than the standard limits in 4 samples, and the over-standard rates were 2.90% and 11.80% respectively. The contents of Hg, As, Cd, Pb and Cr in tumorous stem mustard, semi-finished pickle mustard and pickle mustard were lower than the national standard limits. The pickle mustard was clean. The comprehensive pollution index of tumorous stem mustard samples was less than 0.7. The tumorous stem mustard was clean. The ability of tumorous stem mustard to concentrate harmful elements was Cd>Al>Hg>Pb>As>Cr. The largest average concentration coefficient of cadmium in tumorous stem mustard was 0.09. In general, the planting environment and processing of export pickle mustard in Chongqing city were good. It is necessary to monitor irrigation water and soil quality in some planting bases, because the tumorous stem mustard is easy to concentrate Cd, Hg, Pb and Al in soil.
