Transcript First report of the Working Group on Maximum Residue Levels in the Brew

Report of the Working Group on
Pesticide Maximum Residues Levels in
Tea Brew
Chairman: China, Prof. ZM Chen
Co-chair: India, Dr. A K Barooah
US, Mr. Peter Goggi
1. The attempt and acceptance of using the brewing factor in
the establishment of MRLs in dry tea
Documents entitled “Assessment of MRLs for pesticide residues in tea” and
“Assessment of MRLs for Pesticide in Tea” were adopted by CCPR and
concluded in CCPR report in 2011 and 2012
The MRL of indoxacarb in tea was established as 5 mg/kg and adopted by CCPR
and CAC in May and August of 2014, respectively. This successful attempt
illustrated the concept of considering the residue level in tea brew to establish the
MRL in dry tea has been accepted by the regulatory authorities such as the CCPR
and JMPR.
2. Organization of Ring test to determine the pesticide in tea
brew
Black tea sample incurred with 4 pesticide residues (acetamiprid,
propiconazole, fenpyroximate and flubendiamide) was prepared by
India, 14 labs participated in.
Green tea sample incurred with 3 pesticide residues (imidacloprid,
tolfenpyrad and difenaconazole) was prepared by China, 4 labs
participated in.
The results of black tea will be complied by India and the results of
green tea will be complied by China.
Action Plans
1. Establishment of the methodology to determine the
pesticide residue in tea brew
Ring test organized by India and China covers 2 different
methodologies to determine the pesticides in tea brew.
However, the incurred 7 pesticides in tea brew were determined in
black tea/green tea and different sample preparation procedures
Expect labs from tea producing and tea consuming countries to
participate in Ring Test
2. Continue to create a more rational and scientific MRL
environment in tea in the world tea trade
Enough evidences have demonstrated that many current MRLs in tea
would overestimate the risk of pesticide residues consumed since dry
tea would not usually be consumed raw
Cooperation to establish the methodology and procedure of using the
residue level in tea and tea brew to establish the MRL in tea, as the
drafted policy document of “Guidance Document on Risk Assessment
Using Brew Factor for MRL Fixation in Tea”
Thank you