The measure of translational diffusion using pulsed field gradient NMR has seen a recent renewal of interest with the development of the DOSY experiment (Morris, K. F.; Johnson, C. S., Jr. J. Am. Chem. Soc. 1992,114, 3139), which has a wide field of application as a noninvasive analytical method. In the case of spectral superpositions or of polydisperse species, the processing of the DOSY experiment requires a Laplace transform analysis because this analysis does not make any assumption on the data. We present here the use of the maximum entropy (Max-Ent technique for this processing and compare this method with the other approaches currently used in the literature. We found that MaxEnt produces simultaneously an accurate estimate of the amplitudes of the components of the Laplace spectrum and a reliable detection of their positions.
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机译：随着DOSY实验的发展，使用脉冲场梯度NMR进行平移扩散的测量已引起了人们的关注（Morris，KF; Johnson，CS，Jr. J. Am。Chem。Soc。1992,114，3139），作为无创分析方法具有广泛的应用前景。对于光谱叠加或多分散物种，DOSY实验的处理需要进行拉普拉斯变换分析，因为该分析未对数据做任何假设。我们在这里介绍了最大熵（Max-Ent技术）的使用，并将此方法与文献中当前使用的其他方法进行了比较。我们发现，MaxEnt同时生成了拉普拉斯频谱分量幅度的准确估计。并可靠地检测其位置。
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