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5. US Environmental Protection Agency, Electronic code of federal
regulation: Title 40: Part 180 - tolerances and exemptions for

pesticide chemical residues in food. http://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&tpl=/ecfrbrows e/Title40/40cfr180_main_02.tpl 6. Japanese Ministry of Health, Labour and Welfare, Department of Food Safety. 2006. Director Notice about Analytical Methods for Residual Compositional Substances of Agricultural Chemicals, Feed Additives, and Veterinary Drugs in Food (Syoku-An No. 0124001 January 24, 2005; amendments May 26, 2006). 7. Republic of China National Standard GB 2763-2005. 2005. Maximum residue limits for pesticides in food, Ministry of Health of the People's Republic of China and Ministry of Agriculture of the People's Republic of China. 8. Republic of China National Standard GB 28260-20

4. Conclusion The results of the developed methodology show that the Shimadzu LCMS-8040 triple quadrupole can achieve excellent sensitivity, linearity and repeatability in food extracts for over 200 commonly analysed pesticides. Limits of detection were less than 0.01 mg kg -1 (10 ppb) for both the quantifying and qualifying transitions for all compounds studied, while for 90% of compounds was less than 0.001 mg kg -1 (1ppb) (quantifying transition) and 0.002 mg kg -1 (2 ppb) (qualifying transition); therefore providing excellent response, especially given that the injection volume was only 2 µL. The sensitivity of the LCMS-8040 was able to meet the 0.01 mg kg -1 (10 ppb) requirements of regula

global w430×h280 Fig. 3 Calibration curves, 0.005ʙ0.2mgkg-1 5ʙ200ppb , of eight pesticides in pear matrix

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