کاغذ صافی واتمن نمره ۴
Whatman No.4

بسته 100 عددی ،

قطر 55 الی 150 میلیمتر ،

موجود در دو ورژن جدید و قدیم ،

محصول شرکت واتمن ،

ضمانت اصالت محصول .

توضیحات محصول

WHATMAN

Filter Paper : Qualitative

Grade : ۴

Cat No. : 1004


Grade 4 Qualitative Filter Paper Standard Grade, circle, 125 mm

A standard grade filter used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.

These cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.

Grade 4: 25 um

Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.


Product properties

 
Complete Pack
100 Pieces
Grade
Grade 4
Format
Circles
Type
Standard
Typical Thickness
210 µm
Basis Weight
92 g/m2
Filtration Speed (Herzberg)
54 s
Air Flow Rate
4 s/100 ml/in2
Ash Content
0.06%
Material
Cellulose
Alpha Cellulose Content Min.
0.98%

1)Particle retention rating at 98% efficiency.2)Ash is determined by ignition of the cellulose filter at 900°C in air.