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訂購電話:4001650900

明膠

Cas號:
9000-70-8
英文名稱:
Gelatin
MDL:
MFCD00081638
分子式:
分子量:
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(jī)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(xì)菌作用而變質(zhì)。 
質(zhì)量標(biāo)準(zhǔn):
項目Item                                         生化試劑    
                                                  (BC)
膠凍強(qiáng)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(xì)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(qiáng)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(xì)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(qiáng)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(diǎn) ≥                                        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(diǎn) ph                                     4.7~5.0
不溶物 %≤                                    0.2  
油脂凹點(diǎn) 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(hù)膠體。
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