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纤维素滤膜

纤维素滤膜

简要描述:Whatman纤维素滤纸广泛应用于实验室样品制备、微生物研究、水溶液过滤,有硝酸纤维素膜、醋酸纤维素膜和混合纤维素膜。其中硝酸纤维素膜和混合纤维素膜提供网格供选择,网格线的墨水无毒,并且不含有细菌生长抑制剂。

产品型号: 7001-0004

所属分类:Whatman滤膜滤筒滤器

更新时间:2021-06-27

详细说明:

Cellulose Membranes纤维素滤膜

Whatman提供以下纤维素膜:纯醋酸纤维素膜,纯硝酸纤维素膜,醋酸和硝酸混合纤维素酯膜.

 

Cellulose Acetate Membranes醋酸纤维素膜

Whatman醋酸纤维素膜由纯的醋酸纤维素制造而成,这使得这种膜用于生物和临床分析、无菌测试和闪烁测量非常理想。

醋酸纤维素膜的蛋白吸附力很低。它是亲水性膜,适用于水溶液和酒精(介质)。醋酸纤维素膜已经提高了溶剂抗性,尤其是对低分子量的醇类,同时加强了热稳定性。由于物理强度高,这种滤膜可以耐180摄氏度高温,所以适用于热气体以及用各种办法进行消毒,而保持膜的完整性。

技术参数-醋酸纤维素膜

型号           厚度            水流速                空气流速           起泡点

                  μm             p=0.9bar                 p=3mbar                bar

                                      (ml/min/cm²       (ml/min/cm²

OE 66         115             20                         -                          3.7

OE 67         115             40                        25                        2.7

ST 68         140             170                       50                        1.5

ST 69         140             300                       90                        0.9

 

订货信息-醋酸纤维素膜

尺寸(mm       孔径(μm          目录号                     无菌                 数量/包装

WCA

25                        0.2                      7001-0004                      100

25                        0.45                    7000-0002                      100

47                        0.45                    7000-0004                      100

OE 66

25                       0.2                       10404106                       100

47                       0.2                       10404112                       100

47                       0.2                       10404170                       100

50                       0.2                       10404114                       100

110                     0.2                       10404126                       50

142                     0.2                       10404131                       25

293                     0.2                       10404139                       25

300x600             0.2                       10404180                       5

OE 67

13                      0.45                      10404001                       100

25                      0.45                      10404006                       100

47                      0.45                      10404012                       100

50                      0.45                      10404014                       100

85                      0.45                      10404044                       50

100                    0.45                      10404021                       50

110                    0.45                      10404026                       50

142                    0.45                      10404031                       25

OE 67/A

142                    0.45                      10404331                       25

ST 68

47                      0.8                        10403112                       100

50                      0.8                        10403114                       100

ST 69

47                      1.2                        10403012                       100

50                      1.2                        10403014                       100

Cellulose Nitrate Membranes硝酸纤维素膜

推荐用于大多数日常应用,是在严格控制室内清洁的条件下生产的。一般情况下,无需要求任何明显的技术改变,就可以直接替换掉其他生产厂商的用于一般过滤目的的滤膜。使用者会从Whatman现有的滤膜的改进中获得益处。

 

更高的强度和韧性

大多数膜本质上都很脆弱而且不容易操作;但是很少在装载到过滤器或在使用过程中损坏掉。Whatman硝酸纤维素膜韧性很明显加强了,能承受住在不破坏膜完整性的条件下操作、装载和消毒时的撕裂。经破裂测试已是最强的膜。

 

低可提取水平

滤膜中可提取物水平和过滤或吸附技术的改进一样变得越来越重要。尤其是在药学、免疫学、生物学组织培养和衡量分析应用方面,高的提取物水平会起到负面影响。Whatman硝酸纤维素膜的提取物水平一般比其它同种型号的膜低。

 

孔径精确

Whatman滤膜一个主要特征是孔径精确度很高。膜的孔径率经先进的生产和控制系统严格控制。另外,批间差的变化最小,保持一致的实验结果。

 

增加的温度稳定性

滤膜可以在不失完整性的情况下在121摄氏度下进行正常消毒。硝酸纤维素膜有圆片、方片和卷状等规格。

 

收缩量减小

过多的收缩在消毒过程中会产生问题,也经常会在消毒后再滤器中发生膜的撕裂,也可能导致流速的降低和整个过滤量的减少。Whatman滤膜在消毒过程中收缩量低。

 

特征和优点:

一、孔径分布精确能改进表面俘获和分析。

二、提取物水平低,保证样品的完整性。

 

应用

一、样品分离

二、微生物研究

三、水溶液过滤

 

Cellulose Nitrate Filter Types硝酸纤维素膜类型

白色光滑滤膜

这是大多数实验室应用的标准滤膜,用于1.0μm-5.0μm大小的颗粒和细胞。过滤后的残留物大多数保留在膜的表面,可以进行沉淀物物理性回收和显微镜观察。

 

用于核算和蛋白分析的硝酸纤维素膜

1975年,EMSouthern发明了从琼脂凝胶转移DNA到一张硝酸纤维素膜的技术。这个技术以它的发明者命名为Southern Blotting。随后,蛋白和RNA转移的技术也发展起来了。与层析技术相关的是需要相当数量的高质量的色谱纸,3MM纸已经成为的层析纸。

技术参数-硝酸纤维素膜

                                                 硝酸纤维

厚度                                         125μm

爆裂强度                                 >2 psi

重量                                         3.6-5.5 mg/cm²

最高操作温度                          80

孔率                                          66-84%

蒸汽高压灭菌                          yes

亲水性                                      yes

 

典型应用-硝酸纤维素膜

应用领域                     孔径(μm)           应用领域                                孔径(μm)

普通                                                       沉淀物分析                            0.45

微过滤                         0.1                    悬浮颗粒                                 5

超净                             0.1                    空气污染监测             

灭菌                             0.2                    Asbestos Monitoring(NIOSH)   0.8

去除大多数微生物     0.45                  食品饮料控制            

分析性沉淀物             0.65                  大肠杆菌                                 0.45(网格)

纯化过滤                     1                       总细菌计数                             0.2

去除颗粒物                 5                       组织培养基              

水中微生物分析                                  去除支原体                             0.1

细菌计数                     0.45(网格)  灭菌过滤                                 0.2

 

订货信息-硝酸纤维素膜

尺寸(mm            孔径(μm           目录号                     数量/

WCN

13                              0.2                           7182-001                100

13                              0.45                         7184-001                100

25                              0.2                           7182-002                100

25                              0.1                           7181-002                100

25                              0.45                         7184-002                100

25                              0.65                         7186-002                100

25                              0.8                           7188-002                100

25                              1.0                           7190-002                100

25                              3.0                           7193-002                100

25                              5.0                           7195-002                100

37                              0.45                         7184-003                100

37                              0.8                           7188-003                100

47                              0.1                           7181-004                100

47                              0.2                           7182-004                100

47                              0.45                         7141-004                100

47                              0.45                         7141-104                100

47                              0.45                         7141-114                100

47                              0.45                         7141-204                100

47                              0.45                         7141-124                200

47                              0.45                         7141-154                1000

47                              0.45                         7184-004                100

47                              0.65                         7186-004                100

47                              0.8                           7188-004                100

47                              1.0                           7190-004                100

47                              3.0                           7193-004                100

47                              5.0                           7195-004                100

82                              0.45                         7184-008                25

90                              0.2                           7182-009                25

90                              0.45                         7184-009                25

90                              0.8                           7188-009                25

90                              1.0                           7190-009                25

90                              5.0                           7195-009                25

142                            0.2                           7182-014                25

142                            0.45                         7184-014                25

293                            0.45                         7184-029                25

 

 

化学稳定性和惰性

PTFE适用于化学腐蚀性强的有机溶剂、水溶液和气体,它对大多数的酸性、碱性和溶液都有抗性,非



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