Automated NMR analysis using solvents and sample tube materials to control frequency shifts

   
   

Test tubes with different dielectric properties are used for holding different samples/solvents within a nuclear magnetic resonance (NMR) probe of an NMR spectrometer. The test tube dielectric properties are chosen such that the overall capacitance seen by the NMR probe coils remains constant as different samples and test tubes are inserted into the probe. Samples having different solvents introduce substantially equal frequency shifts into the measurement circuitry. The disclosed systems and methods facilitate automated NMR measurements, and do not require specialized electronic or moving mechanical components for tuning compensation.

Os tubos de teste com propriedades dieléctricas diferentes são usados prendendo samples/solvents diferente dentro de uma ponta de prova (NMR) do resonance magnético nuclear de um spectrometer NMR. As propriedades dieléctricas do tubo de teste são escolhidas tais que a capacidade total vista pela constante NMR do remains das bobinas da ponta de prova como amostras diferentes e os tubos de teste estão introduzidos na ponta de prova. As amostras que têm solventes diferentes introduzem deslocamentos substancialmente iguais da freqüência nos circuitos da medida. Os sistemas e os métodos divulgados facilitam medidas NMR automatizadas, e não requerem componentes mecânicos eletrônicos ou móveis especializados para a compensação ajustando.

 
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