现在发展到多少MHz了？

应该问商用NMR发展到多少M了

如果不是商用的呢？

就是的，实验室里研制的肯定比已经商品化的性能好

现阶段，Bruker生产的NMR最高的为950MHz
Varian生产的NMR最高为800MHz

中国最高的在北大，800MHz,Bruker产。

去美国高场实验室网站看看

varian 早就有900m的啦
^_^

Companies

Bruker Biospin, based in Massachusetts, US, sells a range of NMR equipment, including spectrometers. The company provides superconducting NMR magnets up to 900MHz. It also sells a range of NMR accessories, including cryoprobes and magic angle spinning probes.
Oxford Instruments is based in Oxfordshire, UK. The company sells NMR magnets for ultra-high field applications, offering NMR magnetic field strengths up to 950MHz. It also sells benchtop NMR machines and accessories.
Varian sells NMR magnets and a range of probes including cryoprobes and solid and liquid state probes. It also sells software to deal with data acquisition, processing and analysis.The company is based in Palo Alto, US.
JEOL, based in Tokyo, Japan, provides a range of NMR spectrometers. Its ECX range is available from 300 to 500 MHz field strengths. Meanwhile, its ECA NMR covers 300 to 920MHz. The company also sells NMR probes.

http://www.rsc.org/chemistryworld/restricted/2006/May/NMR3D.asp

有自攒、瞬时高达40T的（>1.6G)。


知之为知之，不知为不知，是知也。

就我所知, 英国的 Oxford 公司主要生产磁体, 本身不生产核磁超导谱仪. 950 兆的谱仪应该没有生产出来.
Varian 公司和 Oxford 合作了几十年, 近期解除了合作关系.