1 材料与方法
1.1 仪器与试剂
1.2 样品前处理
1.3 试验方法
1.3.1 色谱谱条件的优化
1.3.3 净化条件的选择
1.3.4 定容液的选择
1.4 测定指标和方法
1.4.1 线性范围与检出限
1.4.2 回收率与精密度
1.5 色谱、质谱参数
1.5.1 色谱参数
表1 梯度洗脱程序 |
| 时间/min | 流动相V A/% | 流动相V B/% |
|---|---|---|
| 0 | 90 | 10 |
| 1.00 | 90 | 10 |
| 3.00 | 10 | 90 |
| 5.00 | 10 | 90 |
| 5.01 | 90 | 10 |
| 7.00 | 90 | 10 |
1.5.2 质谱参数
表2 多反应监测模式(MRM)参数 |
| 名称 | 母离子/ (m/z) | 子离子/ (m/z) | 传输电 压/V | 碰撞能 量/eV |
|---|---|---|---|---|
| 泰地罗新 | 734.4 | 98.2* | 100 | 40 |
| 174.4 | 100 | 45 | ||
| 泰地罗新-D10 | 744.7 | 108.1 | 100 | 40 |
|
2 结果与分析
2.1 仪器条件的选择
2.1.1 色谱条件的优化
2.1.2 质谱条件的优化
2.2 净化条件的选择
2.3 定容液的选择
2.4 线性范围与检出限
表4 泰地罗新线性关系 |
| 名称 | 泰地罗新 |
|---|---|
| 线性范围/(μg/L) | 5~50 |
| 相关系数r | 0.999 7 |
| 线性方程 | y=0.069 98x-0.065 15 |
2.5 回收率与精密度
表5 泰地罗新的回收率和精密度 |
| 基质 | 添加水平 /(μg/kg) | 标准添加基质实测值/(μg/kg) | 平均值 | 回收率范围/% | RSD/% | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |||||
| 猪肉 | 5 | 4.52 | 4.71 | 5.18 | 4.49 | 5.41 | 4.88 | 4.87 | 89.8~108.2 | 6.02 |
| 10 | 10.42 | 10.74 | 9.86 | 9.49 | 10.74 | 9.87 | 10.19 | 94.9~107.4 | 4.38 | |
| 100 | 96.00 | 93.60 | 86.50 | 93.00 | 87.60 | 96.60 | 92.22 | 86.5~96.6 | 3.74 | |
| 1 200 | 1 109.00 | 1 128.00 | 1 108.00 | 1 106.00 | 1 206.00 | 1 210.00 | 1 145.00 | 92.2~100.8 | 3.70 | |
| 牛肉 | 5 | 5.42 | 4.75 | 5.26 | 5.56 | 4.89 | 4.43 | 5.05 | 88.6~108.5 | 7.14 |
| 10 | 10.28 | 10.49 | 10.26 | 10.26 | 9.89 | 10.20 | 10.23 | 98.9~104.9 | 1.21 | |
| 100 | 92.40 | 92.00 | 93.40 | 90.60 | 104.00 | 94.60 | 94.50 | 90.6~104 | 3.39 | |
| 400 | 395.00 | 402.00 | 410.00 | 406.00 | 407.00 | 412.00 | 405.00 | 98.8~103.0 | 1.12 | |
| 羊肉 | 5 | 5.34 | 4.57 | 4.88 | 4.99 | 5.11 | 5.04 | 4.99 | 91.4~108.2 | 3.52 |
| 10 | 10.32 | 10.81 | 9.86 | 10.58 | 9.89 | 10.02 | 10.25 | 98.9~108.1 | 3.16 | |
| 100 | 96.80 | 91.20 | 89.00 | 97.40 | 93.40 | 92.60 | 93.40 | 89.0~97.4 | 2.64 | |
| 猪肝 | 5 | 5.10 | 4.45 | 4.90 | 5.21 | 4.79 | 5.46 | 4.98 | 89.8~109.2 | 5.48 |
| 10 | 11.06 | 10.23 | 10.49 | 10.89 | 11.02 | 10.38 | 10.68 | 102.3~110.6 | 2.92 | |
| 100 | 85.80 | 84.60 | 97.60 | 87.80 | 90.80 | 89.60 | 89.37 | 84.6~97.6 | 3.69 | |
| 5 000 | 4 911.00 | 4 892.00 | 5 003.00 | 5 010.00 | 5 120.00 | 5 006.00 | 4 990.00 | 97.8~102.4 | 1.19 | |
| 猪肾 | 5 | 5.02 | 5.12 | 4.52 | 4.86 | 5.13 | 4.98 | 4.94 | 90.4~102.5 | 3.33 |
| 10 | 10.29 | 10.69 | 10.26 | 9.96 | 10.59 | 10.56 | 10.39 | 99.6~106.9 | 2.14 | |
| 100 | 92.80 | 88.60 | 91.00 | 95.20 | 96.60 | 97.60 | 93.63 | 88.6~97.6 | 3.03 | |
| 10 000 | 9 998.00 | 10 226.00 | 10 134.00 | 9 989.00 | 10 350.00 | 10 123.00 | 10 137.00 | 99.8~103.5 | 1.00 | |
| 牛肝 | 5 | 4.98 | 4.71 | 4.48 | 5.05 | 5.12 | 5.04 | 4.90 | 94.2~102.4 | 4.13 |
| 10 | 10.63 | 10.45 | 10.06 | 10.56 | 10.23 | 10.28 | 10.37 | 100.6~106.3 | 1.73 | |
| 100 | 91.80 | 94.40 | 85.20 | 100.40 | 94.80 | 89.20 | 92.63 | 85.2~100.4 | 4.21 | |
| 2 000 | 1 886.00 | 1 926.00 | 2 104.00 | 2 016.00 | 1 906.00 | 1 963.00 | 1 967.00 | 94.3~105.2 | 3.16 | |
| 牛肾 | 5 | 4.72 | 4.98 | 4.99 | 4.80 | 5.40 | 4.82 | 4.95 | 94.4~108.0 | 3.51 |
| 10 | 10.30 | 10.16 | 9.57 | 9.89 | 10.26 | 10.02 | 10.03 | 95.7~103.4 | 2.07 | |
| 100 | 92.00 | 95.36 | 86.20 | 94.60 | 95.00 | 91.20 | 92.39 | 86.2~95.4 | 2.81 | |
| 3 000 | 2 806.00 | 2 796.00 | 2 936.00 | 2 874.00 | 2 966.00 | 3 005.00 | 2 897.00 | 93.2~100.7 | 2.48 | |
| 羊肝 | 5 | 4.49 | 5.38 | 5.04 | 5.26 | 5.26 | 4.50 | 4.99 | 89.7~107.6 | 6.59 |
| 10 | 10.38 | 10.24 | 10.61 | 10.26 | 10.05 | 9.98 | 10.25 | 99.8~106.2 | 1.60 | |
| 100 | 85.60 | 85.60 | 91.40 | 86.00 | 97.40 | 100.60 | 91.10 | 85.6~100.6 | 5.89 | |
| 羊肾 | 5 | 4.51 | 5.27 | 4.69 | 5.05 | 5.12 | 5.06 | 4.95 | 90.2~105.4 | 4.73 |
| 10 | 10.26 | 10.24 | 10.59 | 10.06 | 9.86 | 10.06 | 10.18 | 98.6~105.9 | 1.82 | |
| 100 | 86.00 | 88.80 | 98.00 | 84.60 | 81.80 | 95.00 | 89.03 | 81.8~98.0 | 5.59 | |
| 牛奶 | 5 | 4.80 | 5.09 | 5.34 | 4.69 | 5.15 | 5.12 | 5.03 | 93.7~102.6 | 3.83 |
| 10 | 10.61 | 10.24 | 10.39 | 10.28 | 9.98 | 10.23 | 10.29 | 99.8~106.1 | 1.38 | |
| 100 | 100.20 | 92.20 | 92.60 | 91.80 | 93.40 | 93.80 | 94.00 | 91.8~100.2 | 2.20 | |