توضیحات محصول
WHATMAN
Filter Paper : Qualitative
Grade : ۴
Cat No. : 1004
کاغذ صافی واتمن نمره ۴
Whatman No.4
تماس بگیرید
بسته 100 عددی ،
قطر 55 الی 150 میلیمتر ،
موجود در دو ورژن جدید و قدیم ،
محصول شرکت واتمن ،
ضمانت اصالت محصول .
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.
