Table 2. Comparison of chlorpyrifos residues in edible parts of brassica chinensis, lettuce, celery, asparagus lettuce, eggplant and pepper with Maximum Residue Limits (MRLs).*^1.

		Residue (mg kg−1)		MRL (mg kg−1)
Commodity	Crop group*2	PHI 7 days	PHI 21 days	CAC*3	China*4	USA*5	EU*6
Edible plants:
Brassica chinensis	5B	4.55	0.97	1.0	0.1	1.0	0.5
Lettuce	4A	3.07	0.56	*7	0.1	*7	0.05
Celery	4B	16.9	3.50	*7	0.05	*7	0.05
Asparagus Lettuce	4B	5.96	1.47	*7	0.1	*7	*7
Edible fruits:
Eggplant (fruit)	8–10B 8–10C	0.01	<0.01	*7	*7	*7	0.5
Pepper (fruit)	8–10B	0.03	<0.01	2.0(sweet pepper)	*7	1.0	1.0

^*1Please note that this work intended to study pesticide persistence instead of for MRL establishment. The comparison described in above the table is used to study the persistence and dissipation of chlorpyrifos in the selected crops. The high residues above were due to the high application rate and different formulations.

^*2Code of Federal Regulations Title 40 Part 180.41 Crop group table (40 CFR 180.41). Group 4A/4B Leafy vegetables (except brassica vegetables), 5B Brassica leafy vegetable, 8–10B 8–10C Fruiting vegetable group.

^*3CODEX Alimentarius: List of standards: http://www.codexalimentarius.org/standards/list-of-standards/en/?provide=standards&orderField=fullReference&sort=asc&num1=CAC/MRL.

^*4Chinese National Standards (GB2763-2012): Maximum Residue Limits for Pesticides in Foods.

^*5The United States Tolerances and Exemptions for Pesticide Chemical Residues in Food: http://www.ecfr.gov/cgi-bin/text-idx?SID=e33dfa87fab3f5ddecad25dafa7028ea&node=40∶25.0.1.1.27.3.19.113&rgn = div8.

^*6Pesticide EU-MRLs (Regulation (EC) No 396/2005, MRLs updated on 28/01/2014) http://ec.europa.eu/sanco_pesticides/public/index.cfm?event=substance.resultat&s=1.

^*7MRLs not currently established or registrations canceled.