Source:http://linkedlifedata.com/resource/umls/id/C0008564
MSH: Separation technique in which the stationary phase consists of ion exchange resins. The resins contain loosely held small ions that easily exchange places with other small ions of like charge present in solutions washed over the resins.,CSP: separation technique in which the stationary phase consists of ion exchange resins; the resins contain loosely held small ions that easily exchange places with other small ions of like charge present in solutions washed over the resins.