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Method Performance Feedback 2012.01
AOAC OMA 2014.09
Determination and Confirmation of Residues of 653 Multiclass Pesticides and Chemical Pollutants in Tea
Was the method's applicability considered?
Please state the method's applicability statement:
Yes
A subset of the more than 600 compounds shown in the official method was chosen by an AOAC
participating group.
Yes
Page 1429 under collaborative study protocol: scope/applicability published in JAOACI 98 (5) 1428-
1454 (2015)
No
Did not see applicability information related to tea, although scope of analytes was well documented.
Yes
Method is applicable for the qualitative, quantitative and confirmatory analysis of 653 pesticides and
chemical pollutant residues in tea
Yes
Applicability stated by the authors in the OMA 2014.09:
“The method analyzes 653 Multiclass Pesticides and Chemical Pollutants in Tea by GC/MS,
GC/MS/MS, and LC/MS/MS. The method could be applied for Green tea, Oolong tea, Black tea and
Puer tea.
LOQs for the 653 pesticides included in the SLV ranged from 0.03 to 1210 μg/kg. LODs of the GC/MS
method ranged from 1.0 to 500 μg/kg, and the corresponding LOQs ranged from 2.0 to 1000 μg/kg.
LODs of the GC/MS/MS method ranged from 1.0 to 900 μg/kg, and the corresponding LOQs ranged
from 2.0 to 1800 μg/kg. LODs of the LC/MS/MS method ranged from 0.03 to 4820 μg/kg, and the
corresponding LOQs ranged from 0.06 to 9640 μg/kg.
A total of 482 of the 653 pesticides can be analyzed by GC/MS and GC/MS/MS, while 417 of the 653
pesticides can be analyzed by LC/MS/MS with LODs ≤100 μg/kg. There are 264 out of the 653
pesticides that can be analyzed by GC/MS, and 325 out of 653 by LC/MS/MS with LODs ≤10 μg/kg.
There are 270 pesticides that can be analyzed by both GC/MS and LC/MS/MS. Of these, there are 264
pesticides that can be analyzed by GC/MS and 247 by LC/ MS/MS, with LODs ≤100 μg/kg for the
GC/MS method. There are, however, 133 pesticides that can be analyzed by GC/MS and 200 by
LC/MS/MS, with LODs ≤10 μg/kg”
I still think this description is very confuse, and have some mistakes.
Yes
The method fit for purpose.
Yes
The method analyzes 653 Multiclass Pesticides and Chemical Pollutants in Tea by GC/MS, GC/MS/MS,
and LC/MS/MS. The method could be applied for Green tea, Oolong tea, Black tea and Puer tea.
LOQs for the 653 pesticides included in the SLV ranged from 0.03 to 1210 μg/kg. LODs of the GC/MS
method ranged from 1.0 to 500 μg/kg, and the corresponding LOQs ranged from 2.0 to 1000 μg/kg.
LODs of the GC/MS/MS method ranged from 1.0 to 900 μg/kg, and the corresponding LOQs ranged
from 2.0 to 1800 μg/kg. LODs of the LC/MS/MS method ranged from 0.03 to 4820 μg/kg, and the
corresponding LOQs ranged from 0.06 to 9640 μg/kg.
A total of 482 of the 653 pesticides can be analyzed by GC/MS and GC/MS/MS, while 417 of the 653
pesticides can be analyzed by LC/MS/MS with LODs ≤100 μg/kg. There are 264 out of the 653
pesticides that can be analyzed by GC/MS, and 325 out of 653 by LC/MS/MS with LODs ≤10 μg/kg.
There are 270 pesticides that can be analyzed by both GC/MS and LC/MS/MS. Of these, there are 264
pesticides that can be analyzed by GC/MS and 247 by LC/ MS/MS, with LODs ≤100 μg/kg for the