Sample | Compound | 80% MeCN containing 100 ppm of Na2-EDTA | 80% MeCN | ||||||
---|---|---|---|---|---|---|---|---|---|
R2 | Spiking levels (μg kg−1) | Average recovery (%) | CV (%) | R2 | Spiking levels (μg kg−1) | Average recovery (%) | CV (%) | ||
Beef | 5-CHQ | 0.9989 | 5 | 96.73 | 8.15 | 0.9814 | 5 | 120.37 | 12.72 |
10 | 97.18 | 3.73 | 10 | 110.37 | 19.44 | ||||
20 | 100.41 | 3.86 | 20 | 81.92 | 16.39 | ||||
5,7-DCHQ | 0.9989 | 5 | 103.00 | 7.32 | 0.9923 | 5 | 110.78 | 6.39 | |
10 | 105.77 | 7.90 | 10 | 91.62 | 4.83 | ||||
20 | 111.14 | 9.29 | 20 | 80.17 | 6.14 | ||||
5-CHQG | 0.9972 | 5 | 115.92 | 4.57 | 0.9998 | 5 | 94.49 | 12.42 | |
10 | 92.50 | 9.56 | 10 | 83.61 | 5.67 | ||||
20 | 76.40 | 5.40 | 20 | 85.80 | 9.31 | ||||
5,7-DCHQG | 0.9968 | 5 | 118.65 | 5.34 | 0.9988 | 5 | 104.63 | 12.05 | |
10 | 96.32 | 6.56 | 10 | 92.02 | 7.50 | ||||
20 | 77.70 | 5.31 | 20 | 90.41 | 8.48 | ||||
Pork muscle | 5-CHQ | 0.9981 | 20 | 94.80 | 7.75 | 0.9521 | 20 | 101.60 | 12.34 |
40 | 103.40 | 4.24 | 40 | 110.40 | 39.60 | ||||
80 | 106.56 | 3.05 | 80 | 64.32 | 18.10 | ||||
5,7-DCHQ | 0.9996 | 20 | 106.86 | 4.12 | 0.9867 | 20 | 111.48 | 8.33 | |
40 | 104.54 | 4.28 | 40 | 104.32 | 14.59 | ||||
80 | 100.42 | 7.25 | 80 | 85.30 | 5.36 | ||||
5-CHQG | 0.9996 | 20 | 97.77 | 16.03 | 0.9990 | 20 | 92.16 | 20.63 | |
40 | 87.18 | 14.22 | 40 | 81.68 | 11.86 | ||||
80 | 90.48 | 13.52 | 80 | 102.51 | 14.30 | ||||
5,7-DCHQG | 0.9991 | 20 | 94.14 | 15.62 | 0.9941 | 20 | 81.94 | 21.87 | |
40 | 87.90 | 14.20 | 40 | 80.84 | 9.35 | ||||
80 | 93.09 | 12.10 | 80 | 99.52 | 11.73 | ||||
Chicken | 5-CHQ | 0.9998 | 5 | 95.80 | 9.05 | 0.9125 | 5 | 67.06 | 26.98 |
10 | 99.68 | 5.38 | 10 | 69.86 | 84.03 | ||||
20 | 97.94 | 3.79 | 20 | 131.63 | 28.13 | ||||
5,7-DCHQ | 0.9988 | 5 | 95.99 | 8.57 | 0.9867 | 5 | 70.33 | 16.33 | |
10 | 99.78 | 6.47 | 10 | 77.80 | 42.85 | ||||
20 | 98.56 | 3.32 | 20 | 123.57 | 18.00 | ||||
5-CHQG | 0.9969 | 5 | 112.92 | 11.11 | 0.9975 | 5 | 104.62 | 8.05 | |
10 | 99.08 | 3.24 | 10 | 95.51 | 11.56 | ||||
20 | 78.44 | 3.58 | 20 | 103.75 | 10.34 | ||||
5,7-DCHQG | 0.9975 | 5 | 119.34 | 2.74 | 0.9982 | 5 | 99.57 | 5.58 | |
10 | 98.98 | 3.48 | 10 | 91.78 | 8.66 | ||||
20 | 77.32 | 2.70 | 20 | 99.28 | 10.77 | ||||
Egg | 5-CHQ | 0.9996 | 5 | 97.60 | 8.93 | 0.9716 | 5 | 152.67 | 24.82 |
10 | 106.12 | 2.99 | 10 | 153.92 | 10.29 | ||||
20 | 96.89 | 6.68 | 20 | 102.44 | 21.39 | ||||
5,7-DCHQ | 0.9995 | 5 | 104.60 | 2.95 | 0.9987 | 5 | 101.29 | 5.91 | |
10 | 104.47 | 5.50 | 10 | 89.44 | 3.22 | ||||
20 | 105.98 | 2.77 | 20 | 78.68 | 7.30 | ||||
5-CHQG | 0.9982 | 5 | 90.37 | 27.98 | 0.9997 | 5 | 114.49 | 4.77 | |
10 | 103.11 | 16.11 | 10 | 110.98 | 5.92 | ||||
20 | 101.77 | 13.63 | 20 | 90.21 | 6.76 | ||||
5,7-DCHQG | 0.9971 | 5 | 96.90 | 28.66 | 0.9992 | 5 | 112.84 | 2.74 | |
10 | 99.98 | 12.05 | 10 | 114.72 | 3.95 | ||||
20 | 99.19 | 9.80 | 20 | 94.39 | 7.63 | ||||
Milk | 5-CHQ | 0.9995 | 5 | 91.30 | 4.95 | 0.9902 | 5 | 78.31 | 29.95 |
10 | 95.59 | 4.89 | 10 | 42.82 | 23.69 | ||||
20 | 98.57 | 3.53 | 20 | 46.66 | 39.86 | ||||
5,7-DCHQ | 0.9987 | 5 | 105.81 | 8.50 | 0.9921 | 5 | 96.57 | 32.62 | |
10 | 106.06 | 10.55 | 10 | 63.27 | 18.34 | ||||
20 | 107.00 | 5.15 | 20 | 68.18 | 16.72 | ||||
5-CHQG | 0.9944 | 5 | 120.22 | 28.07 | 0.9881 | 5 | 149.63 | 30.45 | |
10 | 90.45 | 27.83 | 10 | 129.39 | 11.99 | ||||
20 | 109.82 | 25.48 | 20 | 200.95 | 21.51 | ||||
5,7-DCHQG | 0.9987 | 5 | 88.65 | 27.17 | 0.9919 | 5 | 106.48 | 49.77 | |
10 | 81.65 | 24.94 | 10 | 128.60 | 8.86 | ||||
20 | 102.48 | 25.75 | 20 | 169.59 | 25.00 |