I have glucosamine hydrochloride and glucosamine sulfate to analyze. Does someone have some good methods for these two analytes?

Try the following:

C18 column, a mobile phase of acetonitrile: water: acetic acid: triethylamine (4.5: 95.5:0.1:0.05), a flow rate of 0.9 mL/min, and a UV detector set at 254 nm

Are you interested in determination of glucosamine, chloride and sulfate or all three? There are many methods for analyzing carbohydrates such as glucosamine. The right choice depend somewhat upon your analytical requirements regarding determination of other contaminant carbohydrates. If you're simply interested in an assay for glucosamine, a reversed phase method will do nicely but high pH anion exchange is a better choice for high-resolution separations of contaminant carbohydrates. If you are interested in determining chloride and sulfate, the best option is to use Ion Chromatography. Again there are many different approaches to accomplish the separation and detection but most commonly these are separated by anion exchange and detected using suppressed conductivity detection.

There are a lot of articles that use size-exclusion for glucosamine as well.

Does this one have ned to derivitize the glcosamine? It must since glucosamine does not absorb at 254 nm. "C18 column, a mobile phase of acetonitrile: water: acetic acid: triethylamine (4.5: 95.5:0.1:0.05), a flow rate of 0.9 mL/min, and a UV detector set at 254 nm"