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- W2394894105 abstract "OBJECTIVE To analyze characterization and determination of nitrogen in the preparation of Qingkailing injection and its intermediate products. METHOD Hitich amino acid auto analyzer was used, with the packed analysis column (2.6 mm x 50 mm) and the type of was Hitich 2622 SC resin. The speed of buffer solution and ninhydrin colorimetric solution were 0.4 mL x min(-1) and 0. 3 mL x min(-1) respectively. Program heating was used for controlling column temperature, from 57 degrees C (0.0 min) to 65 degrees C (36 min) to 57 (50 min). The reaction temperature was set at 130 degrees C. RESULT Free and binding amino acid the existenceare the main form of nitrogen is amino acid in Qingkailing injection and its intermediate products. The total contents of amino acid in the preparation of Qingkailing injection and its intermediate products, including hydrolyzed solution which is made from neutralization of Concha Margaritifera solution extracted by diluted sulfuric acid and Cornu Bubali solution extracted by diluted sodium hydroxide, aqueous solution of Radix Isatidis extract, 4-blended solution, 6-blended solution and 8-blenede solution, were 59.56%, 24.88%, 41.84%, 13.49, 14.63% respectively. The type of bonded amino acid was founded in the preparation of Qingkailing injection and its intermediate products, including hydrolyzed aqueous solution of Radix Isatidis extract, 4-blended solution, 6-blended solution and 8-blenede solution, and the contents were 9.33%, 15.07%, 16.85%, 19.94% and 19.55%, respectively. CONCLUSION The main resource of the total nitrogen was Bubalus bubalis L. and Isatis indigotica Fort." @default.
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- W2394894105 date "2008-07-01" @default.
- W2394894105 modified "2023-10-16" @default.
- W2394894105 title "Characterization and determination of nitrogen in preparation of qingkailing injection and its intermediate products" @default.
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