MDL：
MFCD00081638

別名：
白明膠,動物膠,筋膠,銀明膠

產(chǎn)品訂購：

品名	規(guī)格	包裝	單價	貨期
明膠	Type B	50g	297元	現(xiàn)貨
明膠	Type B	100g	528元	現(xiàn)貨
明膠	CP	500g	108.9元
明膠	BC	500g	130.9元
明膠	藥用級，gel strength ~240 g Bloom	500g	130.9元
明膠	照相級，gel strength ~250 g Bloom	500g	130.9元
明膠	gel strength ~100 g Bloom	500g	130.9元

性狀：
無色或淺黃色透明或半透明等薄片或粉粒，。系高分子水溶性蛋白質(zhì)的混合體，幾乎無臭，無味，在冷水中吸水膨脹，能膨脹至原重量的5～10倍。溶于熱水、甘油和乙酸，不溶于乙醇、乙醚、氯仿等有機溶劑。無味、無臭。溶于熱水，冷卻后，凍成凝膠狀。在干燥情況下能長期儲存，遇濕空氣受潮后，很容易受細菌作用而變質(zhì)。 

質(zhì)量標(biāo)準：
項目Item                                         生化試劑    
                                                  (BC)
膠凍強度gel strength ，Bloom g                  ≥ 250 （按水份12%商品膠6.67%）      
臭氣與水中不溶物Odour and insoluble matter         合格        
灰分Ash,%                                       ≤ 3.0        
亞硫酸鹽(SO3)Sulfite                               合格        
砷(As)Arsenic,%                                 ≤ 0.0003      
重金屬(以Pb計)Heavy metals,%                    ≤ 0.01        
干燥失重loss on drying,%                        ≤ 17.0  

備注：生化試劑級適用于細胞培養(yǎng)。
  

項目                                            化學(xué)純
                                                  CP
外觀:                                           黃色或微黃色塊狀或半透明，微帶光澤的粉粒
粘度(15%濃度):                                  ≥ 15 ° E
透明度:                                         ≥ 100mm
水份,%                                          ≤ 16
灰份,%                                          ≤ 2
PH 值(1%)                                       5.5-7.0
重金屬(Pb),%                                    ≤ 0.008

品級Grade                                       藥用級  
                                        (Ph Eur ，USP,BP)
水  份  %                                      ≤ 14.0
膠凍強度gel strength ，Bloom g                ≥ 240 （按水份12%商品膠6.67%）
勃氏粘度（按水份12%商品膠6.67%）mPa·S         ≥ 4.7  
粘度下降 %                                     ≤ 7.0
透明度  mm                                     ≥ 450  
透過率 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
鉻含量   ppm                                  ≤ 0.2
砷含量   ppm                                  ≤ 0.8
重金屬   ppm                                  ≤ 50
細菌總數(shù) 個/g                                 ≤ 800
霉菌     個/g                                 ≤ 100
大腸桿菌                                      不得檢出
沙門氏菌                                      不得檢出

品級Grade                                       照相級  
                                        (Photography class)
水分                                          ≤ 14.0  
膠凍強度gel strength ，Bloom g                ≥ 250 （按水份12%商品膠6.67%）
粘度 mpa-s                                    ≥ 4.0  
粘度下降 %                                    ≤ 10.0
凍點 ≥                                        26.5  
透過率 450nm                                  ≥ 80  
620nm                                         ≥ 95  
溶解時間 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  
易變硫 ppm                                    ≤ 2.0  
等電點 ph                                     4.7~5.0
不溶物 %≤                                    0.2  
油脂凹點 個/dm2                                2  
鐵 ppm                                        ≤ 10.0  
氯化物 %                                      ≤ 0.03  
銅 ppm                                        ≤ 3  

貯存：
密封干燥保存，防止霉變。
用途  極譜法測銅，堿性鍍鋅發(fā)光劑，測二氧化硅，鑒別培養(yǎng)基的配制，比濁及比色測定中的保護膠體。