表1 液相色谱流动相洗脱梯度
时间(min) | A% | B% |
0 | 90.0 | 10.0 |
3.0 | 10.0 | 90.0 |
4.0 | 10.0 | 90.0 |
4.5 | 90.0 | 10.0 |
6.5 | 90.0 | 10.0 |
表2 监测离子对、碰撞气能量和锥孔电压
被测物名称及内标名称 | 定性离子对 (m/z) | 定量离子对 (m/z) | 驻留时间 (s) | 碰撞能量 (eV) | 锥孔电压 (V) |
吡虫啉 | 256.2>175.0 | 256.2>175.0 | 0.10 | 18 | 30 |
256.2>209.0 | 0.10 | 15 | 30 | ||
多菌灵 | 191.7>159.7 | 191.7>159.7 | 0.10 | 18 | 27 |
191.7>131.7 | 0.10 | 30 | 27 | ||
甲基硫菌灵 | 343.0>150.9 | 343.0>150.9 | 0.20 | 20 | 25 |
343.0>310.8 | 0.20 | 11 | 25 | ||
霜霉威 | 189.1>101.8 | 189.1>101.8 | 0.15 | 17 | 25 |
189.1>143.9 | 0.15 | 12 | 25 | ||
霜脲氰 | 198.9>127.9 | 198.9>127.9 | 0.10 | 8 | 20 |
198.9>111.0 | 0.10 | 18 | 20 | ||
灭多威 | 163.0>87.9 | 163.0>87.9 | 0.15 | 9 | 16 |
163.0>106.0 | 0.15 | 10 | 16 | ||
D4-吡虫啉 | 260.2>179.1 | 260.2>179.1 | 0.10 | 20 | 25 |
表3 定性确证时相对离子丰度的最大允许偏差
相对离子丰度/% | >50 | >20~50 | >10~20 | ≤10 |
允许的最大偏差/% | ±20 | ±25 | ±30 | ±50 |
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