2. AOACRIChemContMethods-2018Awards

1440 Pang et al.: J ournal of AOAC I nternational V ol. 98, N o. 5, 2015

1 Trifluralin 15 186.7 180.1 184.6 93.4 90.0 91.7 8.3 4.5 15.4 8.4 0.4 16 85.6 85.8 85.7 85.6 85.8 85.7 2.4 2.8 19.0 22.2 1.0 2 Tefluthrin 16 93.4 92.0 92.7 93.4 92.0 92.7 3.5 3.8 9.1 9.8 0.4 16 42.9 42.8 42.8 85.7 85.6 85.6 1.7 4.0 7.3 17.0 0.7 3 Pyrimethanil 16 90.8 89.9 90.3 90.8 89.9 90.3 2.5 2.7 7.9 8.8 0.4 16 41.7 42.3 42.0 83.4 84.5 83.9 1.7 3.9 8.7 20.7 0.8

4 Propyzamide 16 95.4 95.0 95.2 95.4 95.0 95.2 4.0 4.2 8.1 8.5 0.4 14 46.0 45.1 45.1 92.0 90.2 91.1 1.4 3.2 6.9 15.3 0.6 5 Pirimicarb 15 92.4 92.3 92.4 92.4 92.3 92.4 2.6 2.8 9.1 9.9 0.4 13 44.6 43.2 44.6 89.3 86.4 87.8 2.1 4.6 8.3 18.6 0.7 6 Dimethenamid 16 37.5 37.5 37.5 93.8 93.6 93.7 1.2 3.1 3.0 7.9 0.3 16 17.6 17.0 17.3 88.1 85.0 86.6 1.4 7.8 3.6 20.9 0.7 7 Fenchlorphos 16 175.7 175.0 175.3 87.8 87.5 87.7 5.7 3.2 13.4 7.6 0.4 16 82.1 79.8 81.0 82.1 79.8 81.0 5.0 6.2 14.4 17.8 0.8

8 Tolclofos-methyl 14 92.5 92.6 92.7 92.5 92.6 92.5 2.5 2.7 6.1 6.5 0.3 14 44.7 42.7 44.1 89.5 85.4 87.4 2.8 6.5 5.5 12.5 0.5 9 Pirimiphos-methyl 16 94.0 93.1 93.5 94.0 93.1 93.5 2.9 3.1 6.4 6.9 0.3 16 42.8 41.7 42.2 85.5 83.4 84.5 2.8 6.7 7.6 18.0 0.7 10 2,4 ' -DDE 16 372.1 371.2 371.7 93.0 92.8 92.9 10.4 2.8 34.3 9.2 0.5 16 174.0 171.9 172.9 87.0 85.9 86.5 5.2 3.0 28.9 16.7 0.8 11 Bromophos-ethyl 16 92.8 92.3 92.6 92.8 92.3 92.6 2.3 2.5 7.2 7.8 0.3 16 43.7 43.7 43.7 87.4 87.4 87.4 1.7 3.9 9.3 21.3 0.8 12 4,4 ' -DDE 16 373.0 373.0 373.0 93.3 93.3 93.3 10.9 2.9 31.8 8.5 0.5 16 171.7 170.8 171.3 85.9 85.4 85.6 5.8 3.4 34.1 19.9 1.0

13 Procymidone 15 94.3 94.3 94.1 94.3 94.3 94.3 1.9 2.1 8.0 8.5 0.4 16 45.0 43.9 44.5 90.0 87.8 88.9 3.0 6.7 8.3 18.6 0.7 14 Picoxystrobin 16 191.7 192.2 191.9 95.8 96.1 96.0 6.4 3.4 15.3 7.9 0.4 15 90.4 88.4 88.9 90.4 88.4 89.4 3.4 3.8 12.3 13.8 0.6 15 Quinoxyfen 15 90.8 91.8 91.3 90.8 91.8 91.3 4.4 4.9 8.4 9.2 0.4 16 43.2 43.4 43.3 86.4 86.8 86.6 2.7 6.2 10.7 24.8 1.0 16 Chlorfenapyr 16 764.2 754.9 759.6 95.5 94.4 94.9 21.9 2.9 61.1 8.0 0.5 16 333.2 338.2 335.7 83.3 84.6 83.9 22.5 6.7 84.0 25.0 1.3 17 Benalaxyl 15 93.7 95.4 94.1 93.7 95.4 94.6 4.5 4.8 8.0 8.5 0.4 13 42.9 44.8 43.6 85.9 89.7 87.8 2.9 6.6 5.8 13.4 0.5 18 Bifenthrin 15 94.7 95.2 95.1 94.7 95.2 94.9 2.8 2.9 8.7 9.2 0.4 15 45.7 45.3 45.5 91.3 90.6 91.0 3.3 7.2 8.5 18.6 0.7

19 Diflufenican 15 94.4 94.3 94.5 94.4 94.3 94.4 3.4 3.6 8.1 8.6 0.4 15 43.4 42.6 43.4 86.7 85.3 86.0 2.4 5.4 6.4 14.8 0.6 20 Bromopropylate 15 189.5 190.1 190.2 94.8 95.1 94.9 5.4 2.9 15.1 7.9 0.4 16 88.0 87.1 87.6 88.0 87.1 87.6 5.9 6.7 12.3 14.1 0.6

μg/kg RSD R , % HorRat

S R ,

μg/kg RSD r , %

S r ,

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 , No. of Avg. C.,,

μg/kg No.6 No.7

labs No.6 No.7

μg/kg RSD R , % HorRat

rec., %

μg/kg No. 1 No. 2

labs No. 1 No. 2

No. of

No. Pesticide

Table 4. Method efficiency for the determination of 20 pesticides in fortified tea samples by GC/MS (16 laboratories)