图1 Flex HPSE高效溶剂萃取方法
图2 SPE-1000固相萃取方法
表1 16种多环芳烃及替代物、内标的主要特征离子
序号 | 化合物名称 | CAS号 | 保留时间/min | 定量/定性离子 |
1 | 萘-d8(IS 1) | 1146-65-2 | 5.95 | 136/108/154 |
2 | 萘 | 91-20-3 | 5.98 | 128/127/129 |
3 | 苊烯 | 208-96-8 | 8.21 | 152/151/153 |
4 | 苊-d10(IS2) | 15067-26-2 | 8.52 | 164/162/160 |
5 | 苊 | 83-32-9 | 8.52 | 154/153/152 |
6 | 芴 | 86-73-7 | 9.71 | 166/165/167 |
7 | 菲-d10(IS3) | 1517-22-2 | 13.23 | 188/189/160 |
8 | 菲 | 85-01-8 | 13.25 | 178/179/176 |
9 | 蒽 | 120-12-7 | 13.46 | 178/179/176 |
10 | 荧蒽 | 206-44-0 | 17.39 | 202/200/203 |
11 | 芘 | 129-00-0 | 18.06 | 202/200/203 |
12 | 苯并[a]蒽 | 56-55-3 | 21.41 | 228/226/229 |
13 | 屈-d12(IS4) | 1719-03-5 | 21.45 | 240/236/241 |
14 | 屈 | 218-01-9 | 21.49 | 228/226/229 |
15 | 苯并荧蒽 | 205-99-2 | 24.06 | 252/253/250 |
16 | 苯并[k]荧蒽 | 207-08-9 | 24.06 | 252/253/250 |
17 | 苯并[a]芘 | 50-32-8 | 24.96 | 252/253/250 |
18 | 苝-d12(IS5) | 1520-96-3 | 25.11 | 264/260/263 |
19 | 茚苯[1,2,3-cd]芘 | 193-39-5 | 29.06 | 276/277 |
20 | 二苯并[a, h]蒽 | 53-70-3 | 29.18 | 278/279 |
21 | 苯并[ghi]苝 | 191-24-2 | 29.06 | 276/274 |
图3 2000ng/mL的多环芳烃混标SIM色谱图
图4 多环芳烃目标化合物标准曲线绘制结果
图5 空白样品的SIM色谱图
图6污泥样品SIM色谱图
表2 沉积物样品的定量结果
序号 | 名称 | RT/min | 目标化合物含量mg/kg | 平均含量mg/kg | RSD | |
1 | 2 | |||||
1 | 萘 | 5.98 | ND | ND | ND | ND |
2 | 苊烯 | 8.21 | ND | ND | ND | ND |
3 | 苊 | 8.53 | ND | ND | ND | ND |
4 | 芴 | 9.72 | ND | ND | ND | ND |
5 | 菲 | 13.26 | 0.06 | 0.07 | 0.1 | / |
6 | 蒽 | 13.46 | ND | ND | ND | ND |
7 | 荧蒽 | 17.39 | 0.07 | 0.07 | 0.1 | / |
8 | 芘 | 18.06 | 0.06 | 0.06 | 0.1 | / |
9 | 苯并[a]蒽 | 21.41 | ND | ND | ND | ND |
10 | 屈 | 21.49 | ND | ND | ND | ND |
11 | 苯并荧蒽 | 24.06 | ND | ND | ND | ND |
12 | 苯并[k]荧蒽 | 24.06 | ND | ND | ND | ND |
13 | 苯并[a]芘 | 24.96 | ND | ND | ND | ND |
14 | 茚苯[1,2,3-cd]芘 | 29.06 | ND | ND | ND | ND |
15 | 二苯并[a, h]蒽 | 29.18 | ND | ND | ND | ND |
16 | 苯并[ghi]苝 | 30.74 | ND | ND | ND | ND |
图6加标样品SIM色谱图
表3加标回收率结果
序号 | 名称 | 回收率/% | 平均值/% | RSD/% | |||||
1 | 2 | 3 | 4 | 5 | 6 | ||||
1 | 萘 | 67.2 | 66.9 | 77.6 | 77.6 | 65.0 | 65.2 | 69.9 | 8.6 |
2 | 苊烯 | 60.3 | 60.5 | 72.0 | 71.7 | 61.6 | 59.4 | 64.2 | 9.3 |
3 | 苊 | 60.4 | 60.5 | 72.9 | 69.8 | 58.7 | 58.7 | 63.5 | 9.8 |
4 | 芴 | 65.5 | 65.0 | 77.3 | 77.4 | 64.6 | 65.5 | 69.2 | 9.1 |
5 | 菲 | 76.0 | 75.9 | 89.1 | 92.4 | 75.5 | 78.0 | 81.2 | 9.3 |
6 | 蒽 | 76.0 | 75.4 | 80.7 | 83.6 | 74.4 | 79.1 | 78.2 | 4.6 |
7 | 荧蒽 | 95.9 | 94.4 | 102.0 | 102.8 | 95.4 | 95.6 | 97.7 | 3.8 |
8 | 芘 | 96.5 | 95.4 | 102.6 | 103.7 | 97.8 | 98.0 | 99.0 | 3.4 |
9 | 苯并[a]蒽 | 103.8 | 100.9 | 110.0 | 113.5 | 106.7 | 106.7 | 106.9 | 4.2 |
10 | 屈 | 91.7 | 83.1 | 93.7 | 99.7 | 89.7 | 89.3 | 91.2 | 6.0 |
11 | 苯并荧蒽 | 83.7 | 85.3 | 92.7 | 92.7 | 89.9 | 90.8 | 89.2 | 4.3 |
12 | 苯并[k]荧蒽 | 76.8 | 80.7 | 82.3 | 85.4 | 81.5 | 86.7 | 82.2 | 4.3 |
13 | 苯并[a]芘 | 80.1 | 80.9 | 89.5 | 89.7 | 86.6 | 87.2 | 85.7 | 4.9 |
14 | 茚苯[1,2,3-cd]芘 | 94.1 | 98.0 | 109.7 | 113.3 | 108.1 | 106.8 | 105.0 | 7.0 |
15 | 二苯并[a, h]蒽 | 97.1 | 100.6 | 109.5 | 108.9 | 107.4 | 107.0 | 105.1 | 4.8 |
16 | 苯并[ghi]苝 | 92.3 | 96.7 | 110 | 112.5 | 105.3 | 104.3 | 103.5 | 7.5 |