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产品名称:
明胶
英文名称:
Gelatin
MDL:
MFCD00081638
分子式:
分子量:
别名:
白明胶,动物胶,筋胶,银明胶
产品订购:
品名 规格 包装 单价 货期
明胶 Type B 50g 297元 现货
明胶 Type B 100g 528元 现货
明胶 CP 500g 108.9元
明胶 BC 500g 130.9元
明胶 药用级,gel strength ~240 g Bloom 500g 130.9元
明胶 照相级,gel strength ~250 g Bloom 500g 130.9元
明胶 gel strength ~100 g Bloom 500g 130.9元
性状:
无色或浅黄色透明或半透明等薄片或粉粒,。系高分子水溶性蛋白质的混合体,几乎无臭,无味,在冷水中吸水膨胀,能膨胀至原重量的5~10倍。溶于热水、甘油和乙酸,不溶于乙醇、乙醚、氯仿等有机溶剂。无味、无臭。溶于热水,冷却后,冻成凝胶状。在干燥情况下能长期储存,遇湿空气受潮后,很容易受细菌作用而变质。 
质量标准:
项目Item                                         生化试剂    
                                                  (BC)
胶冻强度gel strength ,Bloom g                  ≥ 250 (按水份12%商品胶6.67%)      
臭气与水中不溶物Odour and insoluble matter         合格        
灰分Ash,%                                       ≤ 3.0        
亚硫酸盐(SO3)Sulfite                               合格        
砷(As)Arsenic,%                                 ≤ 0.0003      
重金属(以Pb计)Heavy metals,%                    ≤ 0.01        
干燥失重loss on drying,%                        ≤ 17.0  

备注:生化试剂级适用于细胞培养。
  

项目                                            化学纯
                                                  CP
外观:                                           黄色或微黄色块状或半透明,微带光泽的粉粒
粘度(15%浓度):                                  ≥ 15 ° E
透明度:                                         ≥ 100mm
水份,%                                          ≤ 16
灰份,%                                          ≤ 2
PH 值(1%)                                       5.5-7.0
重金属(Pb),%                                    ≤ 0.008


品级Grade                                       药用级  
                                        (Ph Eur ,USP,BP)
水  份  %                                      ≤ 14.0
胶冻强度gel strength ,Bloom g                ≥ 240 (按水份12%商品胶6.67%)
勃氏粘度(按水份12%商品胶6.67%)mPa·S         ≥ 4.7  
粘度下降 %                                     ≤ 7.0
透明度  mm                                     ≥ 450  
透过率 450nm                                   ≥ 90  
灰  份   %                                     ≤ 0.8  
二氧化硫mg/kg                                  ≤ 40
PH  值 5.0~6.5
水不溶物  %                                   ≤ 0.2
铬含量   ppm                                  ≤ 0.2
砷含量   ppm                                  ≤ 0.8
重金属   ppm                                  ≤ 50
细菌总数 个/g                                 ≤ 800
霉菌     个/g                                 ≤ 100
大肠杆菌                                      不得检出
沙门氏菌                                      不得检出


品级Grade                                       照相级  
                                        (Photography class)
水分                                          ≤ 14.0  
胶冻强度gel strength ,Bloom g                ≥ 250 (按水份12%商品胶6.67%)
粘度 mpa-s                                    ≥ 4.0  
粘度下降 %                                    ≤ 10.0
冻点 ≥                                        26.5  
透过率 450nm                                  ≥ 80  
620nm                                         ≥ 95  
溶解时间 min                                  ≤ 20  
PH值 pn                                       5.5~6.5
灰 分 %                                       ≤ 1.0  
二氧化硫 ppm                                  ≤ 20  
活性硫 ppm                                    ≤ 2.0  
易变硫 ppm                                    ≤ 2.0  
等电点 ph                                     4.7~5.0
不溶物 %≤                                    0.2  
油脂凹点 个/dm2                                2  
铁 ppm                                        ≤ 10.0  
氯化物 %                                      ≤ 0.03  
铜 ppm                                        ≤ 3  

贮存:
密封干燥保存,防止霉变。
用途  极谱法测铜,碱性镀锌发光剂,测二氧化硅,鉴别培养基的配制,比浊及比色测定中的保护胶体。
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