Abstract:

【Objective】 In order to provide technological support for risk estimation of pesticide residues taken from vegetables, the pollution of pesticide in vegetables in Ji’nan city was investigated. Moreover, the variability of pesticide residues in vegetables was explored, and the variability factor was calculated. 【Method】 The level of pesticide pollution was studied by statistic method. The variability factor was calculated using the Harrell-Davis method in accordance with principles recommended by the JMPR. In addition, the procedure of evaluation was validated according to the principles laid down by the JMPR. 【Result】 The detection rate of pesticide residues in all marketplace samples was less than 20% in Ji’nan city. The unqualified rate of vegetables was low (0.6%). The pesticide with highest rate of detection was chlorothalonil. The vegetables with highest rate of pesticide residues detection were leafy vegetables. The relationship between variability factor and mean value of concentrations of contaminations could be expressed by the formula, . 【Conclusion】 The pollution of pesticide residues in vegetables in Ji’nan city is light. The evaluated variability factor is larger than that the value recommended by the JMPR, however, less than the default value used for acute intake assessment of pesticide residues in UK in most cases.

Key words: variability, variability factor, risk assessment, pesticide residues