表1 洗脱剂丙酮+正已烷(1+3)体积对回收率
农药名称 | 洗脱液体积5mL | 洗脱液体积10mL | 洗脱液体积15mL | |||
回收率% | RSD% | 回收率% | RSD% | 回收率% | RSD% | |
毒死蜱 | 68.5 | 3.8 | 95.2 | 6.3 | 95.9 | 5.9 |
氟虫腈 | 64.3 | 4.2 | 89.5 | 7.2 | 90.2 | 6.3 |
联苯菊酯 | 56.7 | 5.9 | 94.3 | 8.1 | 94.7 | 7.3 |
甲氰菊酯 | 67.9 | 6.0 | 98.7 | 5.9 | 98.2 | 8.3 |
三氟氯氰菊酯 | 58.0 | 4.3 | 98.2 | 6.4 | 98.4 | 6.7 |
氯菊酯 | 69.0 | 4.8 | 97.3 | 7.1 | 97.0 | 5.9 |
氟氰戊菊酯 | 75.0 | 5.4 | 96.5 | 7.6 | 96.9 | 6.8 |
溴氰菊酯 | 63.4 | 5.8 | 92.6 | 4.8 | 92.9 | 6.5 |
氰戊菊酯 | 67.4 | 4.7 | 102.5 | 6.2 | 100.4 | 6.7 |
表2 线性方程、相关系数及检出限
农药名称 | 线性方程 | 相关系数 | 检出限/ (mg·kg-1) |
毒死蜱 | y=168832*x-7294.7 | 0.9968 | 0.005 |
氟虫腈 | y=79508*x-2761 | 0.9981 | 0.01 |
联苯菊酯 | y=219536*x-16306 | 0.9974 | 0.01 |
甲氰菊酯 | y=33542*x-3688.3 | 0.9967 | 0.002 |
三氟氯氰菊酯 | y=29130*x-935.77 | 0.9976 | 0.01 |
氯菊酯 | y=97875*x-2609.9 | 0.9985 | 0.01 |
氟氰戊菊酯 | y=74428*x-15907 | 0.9953 | 0.004 |
溴氰菊酯 | y=52833*x-1058.1 | 0.9999 | 0.01 |
氰戊菊酯 | y=116482*x-4036.5 | 0.9992 | 0.01 |
表3 农药混标回收率和相对标准偏差
农药名称 | 添加水平/ (0.05mg·kg-1) | 添加水平/ (0.10mg·kg-1) | ||
回收率范围 | RSD %(n=5) | 回收率范围 | RSD %(n=5) | |
毒死蜱 | 89.0~93.2 | 4.2 | 88.9~94.2 | 5.1 |
氟虫腈 | 88.5~92.9 | 3.9 | 85.9~99.3 | 4.2 |
联苯菊酯 | 87.1~90.5 | 4.6 | 84.6~90.5 | 3.9 |
甲氰菊酯 | 85.9~101.2 | 8.4 | 84.9~91.5 | 4.7 |
三氟氯氰菊酯 | 87.9~95.1 | 2.9 | 89.0~93.4 | 4.1 |
氯菊酯 | 88.9~94.2 | 4.3 | 87.5~95.6 | 3.8 |
氟氰戊菊酯 | 89.0~93.1 | 3.8 | 87.1~90.5 | 3.6 |
溴氰菊酯 | 88.4~92.8 | 2.9 | 87.7~93.5 | 3.4 |
氰戊菊酯 | 90.0~94.8 | 4.0 | 86.1~91.5 | 2.9 |