Residue Digestion of DA-6 in Chinese Cabbage and Risk Assessment of Dietary Intake
In order to clarify the residue elimination of the plant growth regulator DA-6 in Chinese cabbage,and to evaluate the risk of its residue to the public dietary intake,a field experiment was carried out in 10 experimental sites in Liaoning and Gansu,etc,to es-tablish a method for analyzing the residue of DA-6 in Chinese cabbage,to study the final residue of DA-6 in Chinese cabbage,and to evaluate the safety of DA-6 residues in Chinese cabbage by risk quotient.The results showed that the linearity of DA-6 was good in the concentration range of 0.000 3-0.030 0 mg·kg-1 with the correlation coefficients greater than 0.99.The average recoveries of DA-6 in Chinese cabbage were in the range of 92.7%-94.6%at the spiked levels of 0.01,0.05,and 0.20 mg·kg-1 with the relative stan-dard deviations of 1.8%-3.6%,and the limit of quantification was 0.01 mg·kg-1.The dietary intake risk entropy of DA-6 in Chinese cabbage was 1.36%,indicating an acceptable risk.In conclusion,the 10%DA-6 soluble liquid in Chinese cabbage applied three times at the recommended effective application dose diluted 2 000 times would not cause residues of DA-6 in Chinese cabbage ex-ceeding the standard,and did not pose an unacceptable risk to the public health,and the intake of the pesticide DA-6 by the general public was far less than the safe range.
国家科技期刊平台
NSTL
万方数据
维普
