分析测试学报2012，Vol.31Issue(11)：1365-1372,8.DOI:10.3969/j.issn.1004-4957.2012.11.004
油脂低场核磁(LF-NMR)检测参数的优化试验
Determination of Oil Quality by LF-NMR: Optimization of Measurement Parameters
摘要
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, t = 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. Tne results can provide appropriate detection conditions for the latter application of LF-NMR technique in the determination of oil quality.关键词
低场核磁共振(LF-NMR)/油脂/参数优化Key words
LF-NMR/ edible oil/ optimal parameters分类
数理科学引用本文复制引用
史然,王欣,刘宝林,赵婷婷,卢海燕,杨培强..油脂低场核磁(LF-NMR)检测参数的优化试验[J].分析测试学报,2012,31(11):1365-1372,8.基金项目
国家自然科学基金项目(NSFC31201365) （NSFC31201365）
上海市科委重点攻关项目(11142200403) （11142200403）
上海市教委科研创新项目(11YZ109) （11YZ109）
