title: Quantitative analysis of chondroitin sulfate in raw materials, ophthalmic solutions, soft capsules and liquid preparations.
abstract: We performed the quantitative analysis of chondroitin sulfate (CS) obtained from raw materials and various pharmaceutical preparations. To quantify CS content in raw materials and in an ophthalmic solution, each test sample and the authentic CS were first digested by chondroitinase ABC. The CS disaccharides produced were analyzed by strong anion-exchange high-performance liquid chromatography (SAX-HPLC) and CS content was quantified by calculating the total peak areas of the disaccharides derived from a CS calibration curve. In the case of soft capsules, CS was first extracted with hexane followed by phenol-chloroform to remove oil and protein ingredients. The extracted CS samples were depolymerized by chondroitinase ABC and CS content was determined. Quantitative analysis of the disaccharides derived from raw materials and an ophthalmic solution showed the CS contents (%) were 39.5+/-0.1 to 105.6+/-0.1 and 103.3+/-1.2, respectively. In case of CS analysis in soft capsules and liquid preparations, the overall recovery (%) of the spiked CS was 96.79+/-0.53-103.54+/-1.78 and 97.10+/-1.82 to 103.17+/-2.34, respectively. In conclusion, the quantitative analysis of the disaccharides produced by enzymatic digestion can be used in the direct quantitation of CS containing pharmaceutical formulations.
authors.affiliation: Natural Products Research Institute, College of Pharmacy, Seoul National University, 28 Yeonkun-Dong, Jongno-Ku, Seoul 110-460, South Korea.
authors.forename: Joon-Soo
authors.initials: JS
authors.lastname: Sim
authors.forename: Gyungjin
authors.initials: G
authors.lastname: Jun
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Toida
authors.forename: So Yean
authors.initials: SY
authors.lastname: Cho
authors.forename: Don Woong
authors.initials: DW
authors.lastname: Choi
authors.forename: Seung-Yeup
authors.initials: SY
authors.lastname: Chang
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Linhardt
authors.forename: Yeong Shik
authors.initials: YS
authors.lastname: Kim
mesh_terms: D000818:Animals; D002214:Capsules / Q000737:chemistry*; D002356:Cartilage / Q000737:chemistry; D019765:Chondroitin ABC Lyase / Q000378:metabolism; D002809:Chondroitin Sulfates / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D003238:Connective Tissue / Q000737:chemistry*; D004187:Disaccharides / Q000032:analysis; D008970:Molecular Weight; D009883:Ophthalmic Solutions / Q000737:chemistry*; D004364:Pharmaceutical Preparations / Q000737:chemistry*; D012754:Sharks
chemical_list: D002214:Capsules; D004187:Disaccharides; D009883:Ophthalmic Solutions; D004364:Pharmaceutical Preparations; D002809:Chondroitin Sulfates; D019765:Chondroitin ABC Lyase