Dissipation behavior of octachlorodipropyl ether residues during tea planting and brewing process.
The dissipation behavior of octachlorodipropyl ether (OCDPE) residues in fresh tea shoots and in tea prepared under field conditions was investigated, and the transfer of residues from brewed tea to tea infusion was determined. OCDPE levels in tea shoots, prepared tea, tea infusion, and spent tea leaves were determined using a sensitive and simple method. The dissipation of OCDPE is fairly slow in tea shoots and prepared tea, with half-life values of 5.10 and 5.46 days, respectively. The degradation rates of OCDPE residues in tea processing were 23.9-43.1 %. The terminal residues of OCDPE in tea shoots and prepared tea samples after 20 and 30 days of OCDPE application were higher than 0.01 mg/kg. However, OCDPE's transfer rates from brewed tea to tea infusion were only 6.0-14.8 %. Further studies on risk assessment of OCDPE residue in tea on the basis of the relationship of OCDPE in prepared tea and infusion are warranted.
School of Plant Protection, Anhui Agricultural University, Hefei, 230036, China.
Min
M
Liao
Provincial Key Laboratory for Agri-Food Safety, Hefei, 230036, Anhui, China.|School of Resource & Environment, Anhui Agricultural University, Hefei, 230036, China.
Yanhong
Y
Shi
School of Plant Protection, Anhui Agricultural University, Hefei, 230036, China. haiquncao@163.com.|Provincial Key Laboratory for Agri-Food Safety, Hefei, 230036, Anhui, China. haiquncao@163.com.
Haiqun
H
Cao
Provincial Key Laboratory for Agri-Food Safety, Hefei, 230036, Anhui, China.|School of Resource & Environment, Anhui Agricultural University, Hefei, 230036, China.
Rimao
R
Hua
School of Resource & Environment, Anhui Agricultural University, Hefei, 230036, China.
Feng
F
Tang
Provincial Key Laboratory for Agri-Food Safety, Hefei, 230036, Anhui, China.|School of Resource & Environment, Anhui Agricultural University, Hefei, 230036, China.
Xiangwei
X
Wu
Provincial Key Laboratory for Agri-Food Safety, Hefei, 230036, Anhui, China.|School of Resource & Environment, Anhui Agricultural University, Hefei, 230036, China.
Jun
J
Tang
D028241:Camellia sinensis / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D004784:Environmental Monitoring / Q000379:methods*; D004987:Ethers / Q000032:analysis* / Q000378:metabolism; D005506:Food Contamination / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis* / Q000378:metabolism; D010574:Pesticide Synergists / Q000032:analysis* / Q000378:metabolism; D018520:Plant Shoots / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D013662:Tea / Q000737:chemistry*
D004987:Ethers; D010573:Pesticide Residues; D010574:Pesticide Synergists; D013662:Tea; C017970:bis(2,3,3,3-tetrachloropropyl) ether
Dissipation; Fresh tea shoots; Octachlorodipropyl ether (OCDPE); Prepared tea; Residues