BC

项目                                               分子生物学级     
                                                       (Molecular Biology grade)
纯度Purity                                      ≥99.0% (滴定)
pH (1 M):                                         4.7 - 7.0 
水分Water:                                    ≤0.3 % 
胺Ammonium:                               ≤0.1 % 
铁Iron:                                             ≤0.0001 %
铅Lead(%)                                     ≤0.0001
铜Copper(%)                                  ≤0.0001 
吸光度A (1 cm/6 M HPLC 水):  
280 nm:                                 ≤ 0.6 
300 nm:                                 ≤ 0.1
410nm :                                 ≤ 0.1 
红外光谱鉴别Identification (IR)         合格 
RNA酶 RNase                             无
DNA酶 DNase                             无
蛋白酶Protease                          无

项目                                                        生化试剂级
                                                              （BC）
纯度Purity                                               ≥98.0% (NT)
熔点Melting point                                   118°C - 122°C
水溶解试验Solubility in Water           溶液透明
重金属Heavy metals (as Pb)              <5 ppm
硫酸盐灰分Sulfated ash                      <0.05 %
硫酸根SO4                                           < 50 PPM
铁Fe                                                      < 1 PPM
紫外吸收值UV at 280 nm A:               <0.6
外观Appearance                                 白色结晶或结晶粉末
红外光谱鉴别Infrared spectrometry       符合