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| Determination of Oil Quality by LF-NMR:Optimization of Measurement Parameters |
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| DOI：10.3969/j.issn.1004-4957.年份.月份 |
| KeyWord:LF-NMR edible oil optimal parameters |
| Author | Institution |
| 史然,王欣,刘宝林,赵婷婷,卢海燕,杨培强 |
1．上海理工大学食品质量与安全研究所;2．上海纽迈电子科技有限公司 |
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| Abstract: |
| In order to get reliable results,the measurement parameters of low field NMR(LF-NMR) should be optimized.In this paper,effects of instrument parameter,temperature and volume of the sample on the stability and reproducibility of the results were investigated,by using soybean oil as the object.The results indicated that good stability and reproducibility can be guaranteed if the following parameters such as TR=2 000 ms,τ=200 μs,EchoCount=5 000,NS=4,TD=500 050 and SW=250 kHz are chosen.Before the measurement,a sample of 2.5 mL should be stabilized at 32 ℃ for 10 min,and subsequently transferred to the probe and tested after 1 min stabilization.The results can provide appropriate detection conditions for the latter application of LF-NMR technique in the determination of oil quality. |
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