降低这个句子的重复率：Alginate was purchased from Sinopharm Shanghai China with a molecular weight of 100 kDa determined by the high-performance size exclusion chromatography Ref Pectin was purchased from Yuanye

Alginate with a molecular weight of 100 kDa was purchased from Sinopharm (Shanghai, China) [Ref]. Pectin was purchased from Yuanye Bio-Technology (Shanghai, China). Fucoidan from Fucus vesiculosus, chondroitin sulfate A sodium salt, and dermatan sulfate were purchased from Sigma (MO, USA). Hyaluronic acid and Chondroitin sulfate C sodium salt were purchased from Macklin (Shanghai, China). Laminarin, fucoidan from Ascophyllum nodosum, and Heparin sodium were purchased from Aladdin (Shanghai, China), Carbosynth (Oxford, UK), and Sangon Biotech (Shanghai, China) respectively.