重量法测定水中石油类和动植物油类方法研究
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韩少强,杨璟爱,关玉春,王琳
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Determination of petroleum oils, animal and vegetable oils in water by gravimetric method
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Shaoqiang Han,Jing'ai Yang,Yuchun Guan,Lin Wang
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表5 方法精密度和准确度的测定结果
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| 项目 | 石油类 | | 动植物油类 | | 1 | 2 | 3 | 1 | 2 | 3 | | 测定结果/(mg·L-1) | 1 | 10 | 25 | 104 | | 9 | 24 | 101 | | 2 | 10 | 31 | 94 | | 8 | 32 | 96 | | 3 | 12 | 27 | 97 | | 8 | 25 | 93 | | 4 | 12 | 30 | 99 | | 12 | 28 | 98 | | 5 | 12 | 29 | 102 | | 9 | 29 | 99 | | 6 | 13 | 27 | 94 | | 8 | 26 | 94 | | 平均值/(mg·L-1) | 11 | 28 | 98 | | 9 | 27 | 97 | | 标准偏差/(mg·L-1) | 1.2 | 2.3 | 4.1 | | 1.5 | 2.9 | 3.0 | | 相对标准偏差/% | 11 | 7.8 | 4.2 | | 17 | 11 | 3.2 | | 加标量/(mg·L-1) | 10 | 30 | 100 | | 10 | 30 | 100 | | 加标回收率/% | 110 | 93.3 | 98.0 | | 90.0 | 90.0 | 97.0 |
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