AOAC RI Chemical Cont. Methods-2018 Awards

Pang et al.: J ournal of AOAC I nternational V ol. 98, N o. 5, 2015  1441

kg RSD R , % HorRat

RSD r , % S R , μg/

S r ,

μg/kg

Avg.

rec., %

Green tea Oolong tea

Avg. C., μg/kg Rec., % Avg. C., μg/kg Rec., % Avg. C., Avg. S r , μg/kg RSD r , % S R , μg/kg RSD R , No. of Avg. C.,

μg/kg No.6 No.7

1 Trifluralin 11 183.7 182.5 183.1 91.9 91.2 91.5 7.3 4.0 22.4 12.2 0.6 13 87.3 87.1 87.2 87.3 87.1 87.2 1.2 1.4 14.2 16.2 0.7 2 Tefluthrin 13 92.1 92.6 92.2 92.1 92.6 92.3 3.6 3.9 10.7 11.6 0.5 13 43.8 43.8 43.8 87.5 87.6 87.6 1.0 2.3 7.4 16.8 0.7 3 Pyrimethanil 13 89.3 90.1 90.1 89.3 90.1 89.7 3.6 4.0 10.6 11.8 0.5 12 41.0 41.3 43.4 81.9 82.6 82.3 1.0 2.4 5.8 13.3 0.5 4 Propyzamide 13 93.9 95.2 94.6 93.9 95.2 94.6 3.3 3.5 9.5 10.1 0.4 14 41.9 41.6 41.8 83.8 83.3 83.5 1.1 2.7 9.9 23.8 0.9 5 Pirimicarb 12 91.7 93.0 92.5 91.7 93.0 92.4 2.9 3.2 8.6 9.3 0.4 12 42.9 43.1 43.0 85.8 86.2 86.0 1.1 2.7 4.0 9.4 0.4 6 Dimethenamid 13 37.4 37.6 37.5 93.4 94.1 93.7 1.4 3.7 4.5 12.0 0.5 12 17.0 17.5 17.5 84.8 87.7 86.3 0.6 3.5 2.3 13.4 0.5 7 Fenchlorphos 12 175.4 172.8 172.6 87.7 86.4 87.0 7.2 4.2 15.4 8.9 0.4 14 77.0 77.1 77.1 77.0 77.1 77.1 1.6 2.1 18.2 23.6 1.0 8 Tolclofos-methyl 13 92.0 93.3 92.6 92.0 93.3 92.6 3.2 3.4 8.1 8.8 0.4 14 40.4 40.4 40.4 80.7 80.8 80.8 1.0 2.6 9.5 23.6 0.9 9 Pirimiphos- methyl 12 91.9 93.0 92.5 91.9 93.0 92.4 3.3 3.6 6.4 6.9 0.3 12 41.8 43.6 43.2 83.6 87.1 85.4 1.0 2.4 6.0 14.0 0.5 10 2,4 ' -DDE 12 358.0 364.6 361.0 89.5 91.2 90.3 13.6 3.8 36.2 10.0 0.5 11 171.3 172.1 171.7 85.7 86.1 85.9 2.9 1.7 19.6 11.4 0.5 11 Bromophos-ethyl 12 92.7 92.3 92.0 92.7 92.3 92.5 2.8 3.1 7.9 8.6 0.4 12 44.3 43.8 44.6 88.7 87.5 88.1 0.9 2.0 6.5 14.6 0.6 12 4,4 ' -DDE 11 357.7 364.6 360.6 89.4 91.2 90.3 15.0 4.2 23.7 6.6 0.4 12 174.9 176.8 175.9 87.5 88.4 87.9 3.5 2.0 20.0 11.4 0.5 16 Chlorfenapyr 12 744.9 755.1 749.1 93.1 94.4 93.8 36.4 4.9 67.4 9.0 0.5 10 334.1 337.4 335.8 83.5 84.3 83.9 10.3 3.1 23.5 7.0 0.4 17 Benalaxyl 13 90.8 92.7 91.7 90.8 92.7 91.8 4.7 5.1 12.2 13.3 0.6 12 44.5 43.8 44.8 89.1 87.6 88.3 2.4 5.4 6.5 14.6 0.6 18 Bifenthrin 13 96.9 97.3 97.2 96.9 97.3 97.1 5.5 5.6 14.4 14.8 0.7 11 45.0 45.8 45.4 90.0 91.6 90.8 2.2 4.9 5.1 11.1 0.4 13 Procymidone 13 91.8 93.1 92.5 91.8 93.1 92.4 3.5 3.8 12.1 13.1 0.6 14 39.3 40.2 39.7 78.6 80.4 79.5 1.4 3.6 13.0 32.7 1.3 14 Picoxystrobin 13 183.9 187.5 185.7 91.9 93.7 92.8 7.9 4.3 20.9 11.3 0.5 12 86.7 90.6 90.0 86.7 90.6 88.6 2.1 2.3 13.0 14.5 0.6 15 Quinoxyfen 13 90.3 92.9 91.6 90.3 92.9 91.6 4.3 4.7 11.9 13.0 0.6 12 40.6 42.3 42.1 81.2 84.5 82.9 1.2 2.8 6.2 14.7 0.6

19 Diflufenican 12 93.5 97.0 94.5 93.5 97.0 95.3 5.0 5.3 10.5 11.2 0.5 14 41.4 41.6 41.5 82.8 83.3 83.0 1.4 3.4 12.0 28.8 1.1 20 Bromopropylate 12 188.5 191.7 188.9 94.3 95.8 95.1 11.3 6.0 17.3 9.1 0.4 12 83.5 87.2 86.6 83.5 87.2 85.3 2.9 3.3 14.3 16.5 0.7

labs No.6 No.7

% HorRat

rec., %

μg/kg No. 1 No. 2

labs No. 1 No. 2

No. of

No. Pesticide

Table 5. Method efficiency for the determination of 20 pesticides in fortified tea samples by GC/MS/MS (14 laboratories)