توضیحات محصول
WHATMAN
Filter Paper : Ashless
Grade : ۴۲
Cat No. : 1442
کاغذ صافی واتمن نمره ۴۲
Whatman No.42
تماس بگیرید
بسته 100 عددی ،
قطر 55 الی 150 میلیمتر ،
موجود در دو ورژن جدید و قدیم ،
محصول شرکت واتمن ،
ضمانت اصالت محصول .
Grade 42 Quantitative Filter Paper Ashless (Ash 0.007%), circle
A world standard for critical gravimetric analysis with the finest particle retention of all Whatman cellulose filter papers from GE Healthcare.
Ashless: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades. These are very pure filters suitable for a wide range of critical analytical filtration procedures.
Whatman quantitative filters from GE Healthcare are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet specific needs.
Grade 42: 2.5 um
Typical analytical precipitates include barium sulfate, metastannic acid, and finely precipitated calcium carbonate.
Product properties
| Complete Pack |
100 Pieces
|
| Grade |
Grade 42
|
| Format |
Circles |
| Type |
Ashless
|
| Typical Thickness |
200 µm
|
| Basis Weight |
100 g/m2
|
| Filtration Speed (Herzberg) |
1870 s |
| Air Flow Rate |
107 s/100 mL/in2
|
| Ash Content |
0.007%
|
| Material |
High-quality cotton linters
|
| Alpha Cellulose Content Min. |
0.98%
|
| Tensile M/D Dry |
55.8 N/15 mm
|
| Trace Elements | Aluminum: 2 µg/g Antimony: <0.02 µg/g Arsenic: <0.02 µg/g Barium: <1 µg/g Boron: 1 µg/g Bromine: 1 µg/g Calcium: 13 µg/g Chlorine: 80 µg/g Chromium: 0.3 µg/g Copper: 0.3 µg/g Fluorine: 0.2 µg/g Iron: 6 µg/g Lead: 0.2 µg/g Magnesium: 1.8 µg/g Manganese: 0.05 µg/g Mercury: <0.005 µg/g Nitrogen: 12 µg/g Potassium: 1.5 µg/g Silicon: <2 µg/g Sodium: 33 µg/g Sulfur: <5 µg/g Zinc: 0.6 µg/g |
1)This data shown may be based on historic Whatman records. We are in the process of updating our supporting information as the manufacturing site for these products is changing or have changed already. We will update with new data as soon as it is available (expected to be completed by Jan. 2016). As is normal practice, customers should determine and validate for themselves (as necessary) that the products are suitable for their specific application. 2)Ash is determined by ignition of the cellulose filter at 900°C in air.
