Studies on the hygroscopicity of glucosamine sulfate powder
- VernacularTitle:硫酸氨基葡萄糖吸湿性研究
- Author:
Mingyan FENG
;
Chen XU
;
Ruizao YI
;
Jianzhong XU
;
Weizhu CHEN
- Publication Type:Journal Article
- Keywords:
glucosamine sulfate;
moisture sorption isotherms;
monolayer moisture content
- From:
Chinese Journal of Marine Drugs
2000;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the hygroscopicity of glucosamine sulfate powder.Methods Hygroscopic studies were conducted on glucosamine sulfate powder at 5℃ and 30℃ used gravimetric method,determined the equilibrium moisture content(EMC) and drew the moisture sorption isotherms.The experimental values were regressed using the BET model,calculated the monolayer moisture content.Results At 30℃,when water activity exceeded 0.43,samples agglomerated,browned and lose adsorbed water,EMC declined;At 5℃,the isotherm had typical ob-S shape,the EMC increased with water activity raising.At 30℃ and 5℃,the monolayer moisture content were 4.8633,5.5740g/100g respectively.Conclusion At 5,30℃ the appropriate aw for storage appeared to be below 0.3056,0.2784,respectively.
