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    Dongyang quantitative filter paper 7cm9cm12.5cm15cm18cm filter paper experimental equipment teaching instrument clean brand
    Dongyang quantitative filter paper 7cm9cm12.5cm15cm18cm filter paper experimental equipment teaching instrument clean brand
    Dongyang quantitative filter paper 7cm9cm12.5cm15cm18cm filter paper experimental equipment teaching instrument clean brand
    Dongyang quantitative filter paper 7cm9cm12.5cm15cm18cm filter paper experimental equipment teaching instrument clean brand
    Dongyang quantitative filter paper 7cm9cm12.5cm15cm18cm filter paper experimental equipment teaching instrument clean brand
    Dongyang quantitative filter paper 7cm9cm12.5cm15cm18cm filter paper experimental equipment teaching instrument clean brand

    Dongyang quantitative filter paper 7cm9cm12.5cm15cm18cm filter paper experimental equipment teaching instrument clean brand

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    126,251 so'm

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    Dongyang quantitative filter paper 9cm medium speed

    126,251 so'm
    200 available

    Dongyang quantitative filter paper 12.5cm medium speed

    205,716 so'm
    200 available

    Dongyang quantitative filter paper 15cm medium speed

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    200 available

    Dongyang quantitative filter paper 18cm medium speed

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    Dongyang quantitative filter paper 7cm9cm12.5cm15cm18cm filter paper experimental equipment teaching instrument clean brand

    About the product

    Characteristic

    Item number

    014083601029

    Type

    Other

    Brand

    Other

    Model

    Dongyang qualitative filter paper

    Purpose

    Other

    Description

    宝贝图片                       

     

     

    商品详情                                          
    东阳定量滤纸 12.5cm
     
    滤纸一般可分为定性及定量两种。在分析化学的应用中,当无机化合物经过过滤分隔出沉淀物后,收集在滤纸上的残余物,可用作计算实验过程中的流失率。定性滤纸经过过滤后有较多的棉质纤维生成,因此只适用于作定性分析;定量滤纸,特别是无灰级的滤纸经过特别的处理程序,能够较有效地抵抗化学反应,因此所生成的杂质较少,可用作定量分析。
        在实验中使用滤纸多连同过滤漏斗及布氏漏斗等仪器一同使用。使用前需把滤纸折成合适的形状,常见的折法是把滤纸折成类似花的形状。滤纸的折迭程度愈高,能提供的表面面积亦愈高,过滤效果亦愈好,但要注意不要过度折迭而导致滤纸破裂。把引流的玻璃棒放在多层滤纸上,用力均匀,避免滤纸破坏。
      在滤纸选择上应主要考虑几点:
     
      1、有效面积有效面积大,即过滤纸使用面积大,容尘量就大,阻力就小,使用寿命就长,当然成本也就相应增加。
     
      2、纤维直径纤维直径越细,拦截效果越好,过滤效率相应较高。
     
      3、滤材中黏结剂含量黏结剂含量高,纸的抗拉强度就高,过滤效率就高,掉毛现象就少,滤材本底积尘小,抗性好,但阻力相应增大。

    Characters

    Properties

    Item number

    014083601029

    Type

    Other

    Brand

    Other

    Model

    Dongyang qualitative filter paper

    Description

    宝贝图片                       

     

     

    商品详情                                          
    东阳定量滤纸 12.5cm
     
    滤纸一般可分为定性及定量两种。在分析化学的应用中,当无机化合物经过过滤分隔出沉淀物后,收集在滤纸上的残余物,可用作计算实验过程中的流失率。定性滤纸经过过滤后有较多的棉质纤维生成,因此只适用于作定性分析;定量滤纸,特别是无灰级的滤纸经过特别的处理程序,能够较有效地抵抗化学反应,因此所生成的杂质较少,可用作定量分析。
        在实验中使用滤纸多连同过滤漏斗及布氏漏斗等仪器一同使用。使用前需把滤纸折成合适的形状,常见的折法是把滤纸折成类似花的形状。滤纸的折迭程度愈高,能提供的表面面积亦愈高,过滤效果亦愈好,但要注意不要过度折迭而导致滤纸破裂。把引流的玻璃棒放在多层滤纸上,用力均匀,避免滤纸破坏。
      在滤纸选择上应主要考虑几点:
     
      1、有效面积有效面积大,即过滤纸使用面积大,容尘量就大,阻力就小,使用寿命就长,当然成本也就相应增加。
     
      2、纤维直径纤维直径越细,拦截效果越好,过滤效率相应较高。
     
      3、滤材中黏结剂含量黏结剂含量高,纸的抗拉强度就高,过滤效率就高,掉毛现象就少,滤材本底积尘小,抗性好,但阻力相应增大。

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