Mr. Okugami,

You should pay attention to the instrumental scheme of NMR and the phenomenology therein. Thus, you shall answer to your own question.

Mr. Okugami,

In addition, you can use MS.

Bojidarka B. Ivanova Thank for the info. You have answer my question! By reading MS, the process is even much simpler that can be applied to many state of chemical compound. Excellent and thank for sharing your knowledge.

I have read about such an instrument few years ago, most likely in Journal of Magnetic Resonance (no warranty however). Big, heavy and power hungry electromagnet was replaced there by two concentric Halbach arrays made from permanent magnets. The field inside the working area is uniform, as it should be, and its strength is easily controlled by reorienting of both arrays.

thanks Marek. I agree more that uniformation and control factor are very important for future.

We are moving forward our analytic for continuous measure over the time using statistical control process.