Filter Circles, Qualitative, Grade 540
The general purpose hardened ashless filter paper with medium retention and flow rate. Extremely pure and strong with a hard surface. High chemical resistance to strong acid and alkali. Frequently used in the gravimetric analysis of metals in acid / alkali solutions and in collecting hydroxides after precipitation by strong alkalis.
|Particle retention in liquid:||8 µm|
|Filtration speed Herzberg:||200 s|
|Ash content:||< 0.006 %|
|Typical thickness:||160 µm|
|Basis weight:||88 g / m2|