practical grade：

外观Appearance                                  白色至浅灰色簿片或粉末

红外光谱鉴定Infrared spectrometry       和对照品匹配

总氮Total Nitrogen(N)                          6.5 - 7.2 %(以干基计)

干燥失重Drying loss                            ≤10.0 %

碳酸钙calcium carbonate:                    < 4.5%

蛋白含量protein-content:                     < 3%

平均分子量average M.W.:                    大约 400000

来源Origin                                         shrimp shells

品级Grade                                         生物试剂级，用于几丁质酶分析  

                                                        (for analysis of chitinase, powder）

外观appearance                                   yellow to tan powder

用作几丁质酶底物实验               Test for use as a substrate for chitinase. 

                                                         Pass

(Enzymatic Positive response after 2 hours of

  incubation in the presence of Chitinase.）